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Beschreibung

Lifestyle diseases and related conditions present a major healthcare challenge for children, posing a significant threat to their well-being. The Editors have compiled chapters to present a multicentric approach to the subject.
This book is an insightful reference on lifestyle diseases and its management in adolescents. It includes twelve topics with a focus on physical, emotional and behavioral aspects of lifestyle diseases. Starting with an introduction to lifestyle issues that can manifest into disease states, the book progresses to advanced topics, including emotional and cognitive developments, effects of mass media ranging from emotional and cognitive health, nutrition requirements and eating disorders, physical inactivity, eating and sleeping patterns, drug and alcohol-abuse, social behavior, anxiety and mental health.
The book highlights the risk factors and determinants of these diseases, and where an immediate intervention is needed. An updated understanding of the diseases with scientific references gives readers crucial information for setting the groundwork for long-term public health policy formulation.
This book serves as a primary resource for scholars and trainees in nursing, medical (pediatrics and endocrinologists) and paramedical courses who are required to understand lifestyle diseases with a focus on adolescents. Readers and professionals in public health, life-sciences and related disciplines can also use this as a secondary reference.
Readership
Primary: scholars and trainees in nursing, medical (pediatrics and endocrinologists) and paramedical courses. Secondary: readers in public health services and administration, life-sciences and related disciplines.

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Veröffentlichungsjahr: 2024

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Table of Contents
BENTHAM SCIENCE PUBLISHERS LTD.
End User License Agreement (for non-institutional, personal use)
Usage Rules:
Disclaimer:
Limitation of Liability:
General:
PREFACE
List of Contributors
Introduction to Adolescent Health and Lifestyle-Related Diseases
Abstract
1. INTRODUCTION
2. ONSET OF PUBERTY
3. PHYSICAL DEVELOPMENT
3.1. 10 to 14 Years of Age
3.2. 15 to 18 Years of Age
3.3. 19 to 21 Years of Age
4. Emotional Development
4.1. 10 to 14 Years of Age
4.2. 15 to 18 Years of Age
4.3. 19 to 21 Years of Age
5. MENSTRUAL CYCLE
5.1. Menarche
5.2. Premenstrual Syndrome
6. LIFESTYLE-RELATED DISEASES
CONCLUSION
References
Emotional and Cognitive Development in Adolescents
Abstract
1. INTRODUCTION
2. DEVELOPMENTAL CHANGES IN ADOLESCENCE
3. HORMONAL CHANGES
3.1. GnRH, FSH and LH
3.2. Dehydroepiandrosterone (DHEA)
3.2.1. DHEA Production
3.2.2. Role of DHEA in Sex Hormone Production
3.3. Sex Hormones
3.3.1. Testosterone
3.3.2. Estrogen
3.4. GABA
4. COGNITIVE DEVELOPMENT
5. FACTORS AFFECTING COGNITIVE DEVELOPMENT
6. EMOTIONAL DEVELOPMENT
7. HORMONAL CHANGES AND PUBERTY
8. Life Experiences
9. Neurobiological Basis of Emotions
10. Gender-related Variations in Emotions
11. Emotion Regulation in Adolescents
CONCLUSION
REFERENCES
Effect of Mass Media on the Psychological Development of Adolescents
Abstract
1. INTRODUCTION
2. MASS MEDIA
3. RISE OF SOCIAL MEDIA
4. INTERACTION OF YOUTH WITH SOCIAL MEDIA
5. POSITIVE IMPACT OF SOCIAL MEDIA ON YOUTH
5.1. Learning Skills
5.2. Self-Expression Medium
5.3. Knowledgebase
5.4. Extracurricular Activity
5.5. Connecting Minds and Hearts
5.6. Helping Hand
5.7. Understanding World Culture
5.8. Personality Development
6. NEGATIVE EFFECT OF SOCIAL MEDIA ON YOUTH
6.1. Like and Share
6.2. Developing Addiction
6.3. Waste of Time
6.4. Anxiety and Mood Swings
6.5. Misunderstanding Among Youth
6.6. Self-obsession
6.7. Selfie Addiction
6.8. The Effects on Sleep
6.9. Mass Media and Mass Violence
7. ROLE OF PARENTS
8. FUTURE ASPECTS
CONCLUSION
References
Adolescent Nutritional Requirements: Myth vs. Reality
Abstract
1. INTRODUCTION
2. DEVELOPMENTAL CHANGES DURING ADOLESCENCE
2.1. Physical Development
2.2. Cognitive Development
2.3. Emotional Development
3. NUTRITIONAL REQUIREMENTS AND DEFICIENCY DISEASES
3.1. Food Pyramid
3.2. Energy
3.3. Protein
3.4. Fat
3.5. Vitamin
3.6. Minerals
4. NUTRITIONAL CONSIDERATIONS
4.1. Food Choice Factors
4.1.1. Personal
4.1.2. Environmental
4.1.3. Health
4.2. Weight Status
4.3. Plant-Based Diets
5. NUTRITIONAL PROBLEMS IN ADOLESCENTS
6. Iron Deficiency, Nutritional Deficits, and Anemia
CONCLUSION
References
Eating Disorders in Adolescents
Abstract
1. INTRODUCTION
2. WHAT IS BULIMIA NERVOSA (BN)
2.1. Epidemiology of BN
2.2. Prevalence of BN
2.3. Etiology of BN
2.4. Signs and Symptoms of BN
2.5. Treatment for BN
2.6. Complications in BN
3. WHAT IS ANOREXIA NERVOSA (AN)
3.1. Etiology of AN
3.2. Epidemiology of AN
3.3. Signs, Symptoms and Complications of AN
3.4. Treatment of AN
4. BINGE EATING DISORDER (BED)
4.1. Etiology of BED
4.2. Symptoms, Consequences and Diagnosis of BED
4.3. Treatment Approaches
CONCLUSION
References
Physical Inactivity among Adolescents
Abstract
1. INTRODUCTION
2. PHYSICAL INACTIVITY
3. FACTORS CAUSING PHYSICAL INACTIVITY
4. RISKS OF BEING PHYSICALLY INACTIVE
4.1. Cardiovascular Diseases
4.2. Obesity
4.3. Neurological and Mental Health
5. BENEFITS OF BEING PHYSICALLY ACTIVE
6. Promotion of physical activity among adolescents
CONCLUSION
References
Irregular Sleeping Patterns in Adolescents
Abstract
1. INTRODUCTION
2. ADOLESCENT SLEEP AND ITS BIOLOGY
3. SLEEP DISORDERS IN ADOLESCENTS
4. RELATION BETWEEN SLEEP AND HEALTH
5. TEENAGE SLEEP DEPRIVATION CAUSES
5.1. Hormonal Time Shift
5.2. Utilizing Gadgets with Screens
5.3. Busy After-school Routine
5.4. Leisure Pursuits
5.5. Exposure to Light
5.6. Disorder of Sleep
6. EFFECTS OF IRREGULAR SLEEP ON HUMAN HEALTH
6.1. Sleep and Mental Health
6.2. Sleep and Obesity
6.3. Sleep and Lethargy
6.4. Accidents and Injuries
6.5. Sleep and Cognitive Ability
7. Sleep-Related Disorders in Adolescents
7.1. Obstructive Sleep Apnea and Snoring
7.2. Gastroesophageal Reflux Disease
7.3. Restless Legs Syndrome
7.4. Narcolepsy
7.5. Sleep Problems Involving the Circadian Rhythm
8. SLEEP MANAGEMENT IN ADOLESCENTS
CONCLUSION
REFERENCES
Obesity in Adolescents-Causes and Consequences
Abstract
1. INTRODUCTION
2. THE MEANING OF THE TERM“CHILDHOOD OBESITY”
3. WHAT LEADS TO OBESITY IN CHILDREN AND TEENS?
3.1. Sugary Drinks
3.2. Snacks and Nibbles
3.3. Portion Size
3.4. The Degree of Activity
4. ENVIRONMENTAL CONSIDERATIONS
5. Socio-cultural Variables
6. Family Considerations
7. ASPECTS OF A PERSON's PSYCHE
7.1. Both Depressive and Anxious States
7.2. Dissatisfaction with One's Body
7.3. Symptoms of Excess Eating
7.4. Emotional Complications
8. THE REPERCUSSIONS OF OBESITY IN ADOLESCENTS AND CHILDREN
8.1. Medical Repercussions
8.2. Socio-emotional Repercussions
8.3. Academic Ramifications
CONCLUSION
References
Consumption of Drugs and Substances of Abuse among Adolescents: Risk and Reasons
Abstract
1. INTRODUCTION
2. REASONS BEHIND SUBSTANCE INTAKE
3. ADDICTIVES CONSUMED BY ADOLESCENTS
3.1. Alcohol
3.1.1. Cigarettes
3.1.2. E-cigarettes (Vaping)
3.2. Tobacco
3.3. Cannabis
4. NEUROBIOLOGY OF DRUG-ADDICTED ADOLESCENT
5. CATEGORIES OF DRUG
6. Hallucinogens
7. Depressants
8. Stimulants
9. DISEASES ASSOCIATED WITH SUBSTANCE ABUSE
9.1. HIV
9.2. Hepatitis C
9.3. Cardiovascular disease
9.4. Syphilis
9.5. COVID-19
10. RISK FACTORS OF DRUG ABUSE
11. LAW AND ORDER FOR DRUG USE ACROSS THE WORLD
12. OVERCOMING DRUG ADDICTION
CONCLUSION
References
Prevalence of Tobacco Use and Alcohol Consumption among Adolescents
Abstract
1. INTRODUCTION
2. UNHEALTHY LIFESTYLE ASSOCIATED WITH ALCOHOL CONSUMPTION
2.1. Harmful Ingredients Found in Alcohol
2.2. Factors Affecting Alcohol Consumption and Alcohol-related Harm in Adolescents
2.3. Social Impact of Alcohol Consumption on Youth
2.4. Economic Impact of Alcohol
2.5. Psychological Impact of Alcohol
2.6. Family and Relationship Problems Due to Alcohol Consumption
3. HEALTH-RELATED PROBLEMS DUE TO ALCOHOL CONSUMPTION
4. TREATMENT
5. UNHEALTHY LIFESTYLE ASSOCIATED WITH TOBACCO CONSUMPTION
6. HISTORY OF TOBACCO CONSUMPTION
6.1. Nicotine: The Addictive Chemical in Tobacco
6.2. Consumption of Tobacco
6.3. Smoking Tobacco Causes Cancer
7. PREVENTIVE MEASURES
CONCLUSION
REFERENCES
Anxiety and Depression-Related Problems Associated with Adolescents
Abstract
1. INTRODUCTION
2. ADOLESCENT BRAIN
3. LIFESTYLE FACTORS CONTRIBUTING TO ANXIETY AND DEPRESSION IN ADOLESCENTS
4. Symptoms of anxiety and depression
5. Neuropsychiatric overview
6. Interventions, treatment, and key targets
Conclusion
References
Pollution and Youth Health
Abstract
1. INTRODUCTION
2. AIR POLLUTION AND ITS EXPOSURE
3. EFFECT OF PARTICULATE MATTER (PM) ON HEALTH
4. EFFECTS OF AIR POLLUTION
4.1. Effects on Pulmonary Health
4.1.1. Asthma
4.1.2. Tuberculosis and Respiratory Infection
4.1.3. Abnormal Functioning of Lungs
4.1.4. Chronic Obstructive Pulmonary Diseases (COPD)
4.2. Effects on Brain Function
4.3. Effects on Cardiovascular System
4.4. Impact on Reproductive Health
CONCLUSION
References
Lifestyle Diseases in Adolescents: Addressing Physical, Emotional, and Behavioral Issues
Edited by
Aditi Singh
&
Abhishek Nandy
Amity Institute of Biotechnology
Amity University Uttar Pradesh, Lucknow Campus
Lucknow-226028
India

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PREFACE

In a person's life, adolescence is a crucial period since it determines how they will view the world and interact with it as adults. It is imperative to understand adolescent development, environmental influences, and risk and protective variables that can affect adolescent health to support the health and healthy development of all adolescents. Thus, maintaining a healthy youth population will ensure a healthy adult population in the future. Approximately 20% of adolescents experience a mental health disorder each year, with depression and anxiety being the most common. About 11% of adolescents aged 13-15 years use tobacco products worldwide. Eating disorders like Anorexia and Bulimia are more prevalent in high-income countries, affecting 1-3% of adolescents. The three modifiable lifestyle behaviours strongly associated with development of LSRDs - Smoking, unhealthy diet, and physical inactivity, are alarmingly increasing in youth and adolescents.

If teenagers are equipped with information and have life skills, they will not only benefit socially and economically, but also support the country's future development in a much better way. Several factors have been identified as leading causes of lifestyle diseases, including lack of physical activity, irregular eating habits, changing lifestyle choices, and sedentary work and stress. For example, the prevalence of obesity among adolescents has increased dramatically in many parts of the world, including both developed and developing countries. As of 2022, over 340 million children and adolescents aged 5-19 were overweight or obese.

The objective of the book “Lifestyle Related Diseases in Adolescents: Addressing Physical, Emotional, and Behavioural Issues” is to give an insight on the adolescent health as it is a distinct period in human development. There are twelve chapters in which we have taken a multicentric approach with topics ranging from emotional and cognitive health, nutrition, physical inactivity, eating and sleeping patterns. prevalence of obesity to drug and alcohol-abuse, social behaviour, and anxiety during adolescence. With this book we try to highlight the risk factors and determinants of all these LSRDs, which are a looming threat, endangering the youth of the world and where an immediate intervention is needed.

Aditi Singh &Abhishek Nandy Amity Institute of Biotechnology Amity University Uttar Pradesh, Lucknow Campus Lucknow-226028 India

List of Contributors

Aditi SinghAmity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow Campus, Lucknow-226028, IndiaAbhishek NandyAmity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow Campus, Lucknow-226028, IndiaAthira R. NathDepartment of Life Sciences, Mount Carmel College, Bengaluru, Karnataka, IndiaAnushka JainAmity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow Campus, Lucknow-226028, IndiaAyushi KeshriAmity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow Campus, Lucknow-226028, IndiaApurva K. SrivastavaDepartment of Microbiology and Pathology, Sardar Patel Post Graduate Institute of Dental and Medical Sciences, Lucknow, IndiaAlok KumarDepartment of Molecular Medicine and Biotechnology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow-226014, IndiaDevendra SinghFaculty of Biotechnology, Institute of Biological Sciences & Technology, Shri Ramswaroop Memorial University, Barabanki, Uttar Pradesh, Lucknow-225001, IndiaDevlina GhoshDepartment of Biochemistry, Saraswati Dental College and Hospital, 233, Ayodhya Road, Tiwari Ganj, Lucknow-226028, IndiaHarshit MishraDepartment of Biotechnology, Dr. Ambedkar Institute of Technology for Handicapped, Kanpur, IndiaHarshit JaiswalDepartment of Biotechnology, Dr. Ambedkar Institute of Technology for Handicapped, Kanpur, IndiaHumaira SaeedAmity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow Campus, Lucknow-226028, IndiaIrena KostovaDepartment of Chemistry, Faculty of Pharmacy, Medical University of Sofia, Sofia, BulgariaKumari DeepaliAmity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow Campus, Lucknow-226028, IndiaManish Singh RajputDepartment of Biotechnology, Dr. Ambedkar Institute of Technology for Handicapped, Kanpur, IndiaMala TrivediAmity Institute of Biotechnology, Amity University Uttar Pradesh Lucknow Campus, Lucknow-226028, IndiaMohammad Haris SiddiquiFaculty of Agricultural Science & Technology & Department of Bioengineering, Faculty of Engineering Integral University, Lucknow, IndiaMedha DwivediAmity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow Campus, Lucknow-226028, IndiaManish DwivediAmity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow Campus, Lucknow-226028, IndiaParul JohriDepartment of Biotechnology, Dr. Ambedkar Institute of Technology for Handicapped, Kanpur, IndiaRishika SinghAmity Business School, Amity University Uttar Pradesh, Lucknow Campus, Lucknow-226028, IndiaRitesh PandeyAmity Institute of Biotechnology, Amity University Uttar Pradesh Lucknow Campus, Lucknow-226028, IndiaSowmya KumarDepartment of Life Sciences, Mount Carmel College, Bengaluru, Karnataka, IndiaShubhaDepartment of Life Sciences, Mount Carmel College, Bengaluru, Karnataka, IndiaSantosh AnandDepartment of Biotechnology, School of Applied Sciences, REVA University, Bengaluru, Karnataka, IndiaSana MoidAmity Business School, Amity University Uttar Pradesh, Lucknow Campus, Lucknow-226028, IndiaSakshi SrivastavaDepartment of Biotechnology, Dr. Ambedkar Institute of Technology for Handicapped, Kanpur, IndiaSushmita SinghAmity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow Campus, Lucknow-226028, IndiaSunil Kumar VermaFaculty of Biotechnology, Institute of Biological Sciences & Technology, Shri Ramswaroop Memorial University, Barabanki, Uttar Pradesh, Lucknow-225001, IndiaShipra SrivastavaAmity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow Campus, Lucknow-226028, IndiaShreya AgrawalAmity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow Campus, Lucknow-226028, IndiaShreetama BhattacharjeeAmity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow Campus, Lucknow-226028, IndiaVartika NishadDepartment of Biotechnology, Dr. Ambedkar Institute of Technology for Handicapped, Kanpur, IndiaYashwardhan SinghAmity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow Campus, Lucknow-226028, India

Introduction to Adolescent Health and Lifestyle-Related Diseases

Aditi Singh1,*,Abhishek Nandy1
1 Amity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow Campus, Lucknow-226028, India

Abstract

Adolescence is a crucial developmental stage that has long-term effects on a person's health and well-being as well as the welfare of society at large. Children learn how to understand abstract concepts, form moral beliefs, and create and sustain fulfilling relationships during adolescence. During adolescence, young people go through a variety of transformations as they become physically adults. Changes in the youth begin with the appearance of secondary sexual traits. Dynamic brain development that is distinguished by interaction with social circumstances throughout adolescence impacts the talents that a person carries into adulthood. In girls, there is the onset of the menstrual cycle, which leaves a big impact on their body. Adolescents across the globe have a lifestyle risk index comprising risky drug and alcohol consumption, unprotected sex, sleep duration, and smoking, which is a fair to good indicator of medical conditions connected to lethal (performing suicide and self-harm) and non-fatal (major depressive disorders and severe psychological distress) diseases. According to the findings of this study, the lifestyle risk index is a valuable summary indicator in the context of teenage health promotion and noncommunicable disease prevention. Adolescent lifestyle risk variables were discovered to cluster, giving additional backing for the deployment of numerous health behavior modification interventions rather than those having a single behavior emphasis.

Keywords: Adolescent, Lifestyle related disorders, Menstrual Cycle, Physical Development.
*Corresponding author Aditi Singh: Amity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow Campus, Lucknow-226028, India, Tel: +91 8303981347; E-mail: [email protected]

1. INTRODUCTION

Over 18 billion adolescents, or 27% of the global population, were under the age of 24 in 2008. This was the biggest cohort ever (UN, World Population Prospects, 2008). The number of people in this population and their health condition are the predictors of future population health (The World Bank, 2007) (WHO, Women and Health, 2009). Most people believe that adolescence is a period of excellent

health with a low disease burden (WHO, Global Health Risks, 2009). Risk elements and lifestyle choices that adolescents choose may not have a significant impact on their health at this time, but they could have a significant impact later in life and may have an impact on the health of generations to come (Patton et al., 2010). With an estimated population exceeding 1/8 billion, or roughly one-fourth of the world's population, the generation of persons aged 10 to 24 now is the greatest in history (United Nations, 2015). Nearly 90% of the world's population resides in low- and middle-income nations, where they make up a significantly larger percentage of the population than in high-income nations due to higher birth rates. A complex web of influences from family, peers, the community, society, and culture affects young people's health and well-being both now and in the future as they mature into adults (Viner et al., 2012).

2. ONSET OF PUBERTY

Similar to early infancy, adolescence is a delicate time when both healthy and unhealthy practices influence future course. This sensitivity has elements related to the physiologic changes occurring prior to, throughout, and after adolescence, as well as the social anchoring of health hazards. Hundred years ago, the general consensus was that puberty was simply a stage of physical development that thrust people into various social circumstances that had an impact on their health (Granville, 2016). We now recognize that adolescence is a highly programmed, physiologically influenced process that has a complicated impact on behavior, mental well-being, and health (Hall GS, 1905). For instance, the rise in behaviors associated with health or mental health states throughout adolescence is more closely connected to the date of puberty than to chronological age. These behavioral and mental health changes may be partially explained by alterations in oxytocin and vasopressin regulation that begin around puberty and have been connected to social connection, pair bonding, and parental behavior in other animals (Insel, 1997). Pubertal timing is also influenced by familial and societal variables, including parental health, marital conflict, and the existence of a stepfather, however, the underlying mechanisms are still unclear (Sandra et al. 2020) (Ellis & Garber, 2000).

3. PHYSICAL DEVELOPMENT

3.1. 10 to 14 Years of Age

These are often the first years of puberty. Early puberty is a time of fast growth for girls. The first menstrual cycle (menarche), which typically occurs between the ages of 11 and 14, causes development to halt (It can occur as young as at 9 years of age or as old as at 15 years of age). The height increase in males happens after the onset of other puberty symptoms. Despite being shorter than girls in early adolescence, guys eventually grow to be taller than girls. This occurs because guys develop more quickly and for a greater amount of time after growth begins.

Due to improved nutrition and health, there has been an ongoing tendency towards early puberty and greater development. The onset of puberty also appears to be influenced by race. Girls of African origin and Hispanic descent, for instance, may grow their breasts earlier than girls of Caucasian heritage (Physical Development., 2021).

Both boys and females frequently experience increased sex drive as a result of the puberty-related hormone surge. Members of both sexes frequently engage in private masturbation. Hormones may also be the cause of episodes of confrontational behavior toward parents and other authoritative figures (Reynolds and Wines., 1951).

The development of one bodily component might not follow the course of another. For instance, the development of the nose, arms, and legs may occur more quickly than that of other body parts. Other bodily changes that often occur throughout puberty include:

Bone development, which lengthens child's skeleton. Thickening of the skull's bones. The jaw moves forward, and the top of the head becomes more pronounced.Gaining weight. In adolescence, a teenager's weight almost doubles.Changes in the composition of body fat. Boys have more body fat than girls. Additionally, girls' current body fat migrates to the upper back, breasts, and pelvis.Increase in organ size. The size of the lungs grows, and the weight of the heart doubles.Boy's facial hair growth. Typically, hair grows from the top lip to the cheeks, then to the chin region.

Many males have gynecomastia, or the growth of breast tissue, between early and middle puberty. Usually, it disappears between six months to two years (van Sluijs et al., 2021).

3.2. 15 to 18 Years of Age

Teens develop at their own rates, and each adolescent experiences healthy growth in a unique way.

Most females experience their first period by the age of 15, after the occurrence of the puberty-related fast growth spurt. Teenage females grow an average of 4 to 7.5 cm (1.5 to 3 inches) after their first period. The development of pubic hair and breasts are two additional early signs of puberty. An average of four years following breast buds signify the start of puberty; in late teenage, typically, female breasts are fully developed (Reynolds EL., 1948).

Boys' growth spurts typically peak between early and middle adolescence. Despite being shorter than girls in their early adolescence, boys often catch up to girls in height by the age of 18. Boys develop more quickly and for an extended period of time after growth begins. Additionally, during the late adolescent years, facial hair, penis and testicles, and pubic hair continue to grow in boys (Blyth DA., 2023).

Individual differences in these and other bodily changes are significant. Some people “bloom” early, while others mature and develop later.

3.3. 19 to 21 Years of Age

The majority of young people's physical growth takes place when they are younger. However, those who go through puberty later in adolescence can still have physical changes. (Sawyer et al., 2012) Male facial hair may thicken at this point, and many young people may still have pimples and acne (Fig. 1 & Table 1).

Table 1Physical and emotional development in males and females of different age group.StageAgePhysical DevelopmentEmotional DevelopmentPuberty10 to 14 years1. Increase in height. 2. Growth of muscles and increase in body weight. 3. Appearance of facial hair in males 4. Onset of the menstrual cycle1. Get distant from relatives. 2. Development of same-sex friendship 3. Demand for freedom 4. Development of individualityAdolescence15 to 18 years1. Development of pubic hair and breasts in female 2. Growth in testicles and penis in males 3. Increase in size of organs. 4. Voice becomes in males while sharp and high-pitched in females.1. Frequently experiment with or focus heavily on their appearance.2. Mood fluctuates from time to time.3. Development of political belief and speech4. Hanging out in mixed-gender groups and on one-on-one datingYoung Adult19 to 21 years1. Thickening of facial hair in males 2. Appearance of pimples and acne1. Focus on career and start to develop focus. 2. Start to take responsibility of families.
Fig. (1)) Physical development between the age of 12-18 in males and females.

4. Emotional Development

4.1. 10 to 14 Years of Age

Between childhood and maturity, years 11 through 14 represent a transitional period. Adolescents naturally experience the psychological need to distance themselves from their relatives. This can occasionally be observed in an obsessive interest in friendships and teen interests. Strong, same-sex friendships often develop in the early adolescent years. Teenagers frequently get disinterested in family issues. They might prefer to be alone themselves at home, dancing to loud music in their rooms (Sacks et al., 2003). Parents may find it upsetting when their children act sullenly and distantly at times. But given the age, that is normal. Teenagers want to feel like adults, but when they are with their guardians, they are constantly reminded of the fact they are still children, even if their elders are not treating them that way (Thijssen, Sandra et al., 2020). The more parents want to maintain their children's innocence, the more freedom teenagers often demand (Ellis and Garber., 2000). Many teenagers engage with friends and work to be independent of their families in order to develop their individuality. As a source of support and guidance, the peer group frequently takes the position of parents, at least in part. Teenagers who have a positive sense of self may be less susceptible to peer pressure. They are most able to draw on principles instilled in them at home when they are presented with challenging situations (Thijssen et al., 2020).

4.2. 15 to 18 Years of Age

Teenagers become better at thinking about and comprehending abstract concepts like morality as they get older. Additionally, they start to comprehend others more fully. They frequently have a strong conviction that their own beliefs are the most accurate while having some empathy and the ability to comprehend that others may have different opinions. Finding one's place in the world plays a large part in the emotional and social development of adolescents. Therefore, it is expected that their moods may fluctuate from day to day (Harris et al., 2005).

Even after puberty, boys continue to grow stronger and more agile. Usually, girls level out. Boys and girls who exercise frequently have stronger muscles and better coordination. Teenagers frequently experiment with or focus heavily on their appearance, hair, jewelry, tattoos, piercings, political beliefs, and speech (Johnson et al., 2011). While parents frequently question whether their kids are self-centered, this conduct is really a means for them to “practice”, “evaluate,” and help define who they are. Typically, as teenagers mature, they outgrow it.

In the later adolescent years, teens become more at ease with their own identities and their peers become less significant. Teenagers start to hang out in mixed-gender groups and on one-on-one dating. They could develop close relationships with older children or adult mentors. These partnerships let teenagers discover more about themselves.

4.3. 19 to 21 Years of Age

Each young person has unique challenges with their adjustment to major familial and societal duties, as well as with basic development in both their bodies and minds. These physiological and social procedures, in addition to their onset and organization, have been impacted by wider factors of history and culture (Shanahan MJ., 2003). As a result, the returns on higher education—the amount someone earns throughout their career after acquiring their undergraduate or master's degree—have reached record levels, particularly in special subjects that support rapidly expanding economic sectors. Moreover, staying in school for a longer period of time can help develop skills . High school graduation as a middle-class entrant is no longer as conducive to flexibility as it once was (Granville S., 2016).

5. MENSTRUAL CYCLE

The menstrual cycle lasts from the first day of bleeding to the first day of the subsequent period. A cycle typically lasts 28 days. However, having a cycle that is either shorter or longer is common. A teen's periods can be lengthy (up to 45 days), eventually getting shorter as they age (Fig. 2).

Fig. (2)) A complete menstrual cycle of a healthy young teenager. Image Credit: How Does the Menstrual Cycle Impact Exercise & Nutrition? PureGym. PureGym; 2023.

Hormonal changes set off each of the three phases of your menstrual cycle.

Menstrual Phase: It may last between four and six days. The endometrium, the uterus' thicker lining, begins to shed on the first day of your cycle.Follicular stage: The egg follicle inside an ovary prepares for the release of an egg (ovulation) during the follicular phase.Premenstrual (Luteal) phase: When the egg is expelled from the ovary's egg follicle on ovulation day, this phase begins. It can occur at any moment during a typical menstrual cycle, from day 7 to day 22.

You might have red spotting or lower pelvic pain or discomfort (mittelschmerz) for less than a day during ovulation. These ovulation symptoms are typical.

A pregnancy starts when the egg implants in (attaches to) the endometrium after being fertilized by sperm (This pregnancy is tracked starting on the first day of this cycle).The endometrium begins to deteriorate if the egg does not get fertilized or if the fertilized egg does not implant.

To stop bleeding, tampons, pads, or menstrual cups are used. When swimming or engaging in other strenuous activities, tampons and menstrual cups should be worn since they are inserted into your vagina. A pad's adhesive strips make it easier for it to adhere to your pants. Tampons and pads need to be changed often. Girls may still engage in all of their regular activities when they are on a period. No one will know when you are having one.

5.1. Menarche

The term “menarche” refers to the first menstrual cycle, which often begins at the age of 12. However, it can begin sooner or later. The menstrual cycle includes your menstruation. The human body goes through a variety of changes throughout this cycle to get ready for a potential baby. Menarche also indicates that sperm can fertilize an egg through intercourse in order to become pregnant. Menarche and the menstrual cycle only occur in adolescent females (Singh et al., 2019).

One can feel anxious or emotional in the days leading up to the onset of your cycle of menstruation. One can feel bloated and gain water weight. Legs, back, or abdominal cramps that continue for several hours or more are possible. Some might develop acne and have sore breasts.

Girls will see a spot of blood on the cloth or in the bathroom when their period first starts. The blood flow from your vagina normally starts out mild and then gradually gets heavier over the course of a couple of days before slowing off. The blood may first be brownish in hue before becoming a brighter crimson. Each month, your period typically lasts 3 to 7 days.

Regular exercise, a heating pad, a warm bath, and non-steroidal anti-inflammatory medicines (NSAIDs) like ibuprofen or naproxen may be helpful if one experiences cramps during your period. Medications must be used with caution (Singh, Jerome Amir et al., 2019).

Menstrual symptoms may be alleviated by engaging in regular exercise, consuming a range of healthy foods, and lowering stress. Limiting foods and beverages like alcohol or caffeine that aggravate the symptoms may also be beneficial. Keeping a record of the day your period begins each month is a good practice. The calendar can assist you in determining when your next period will arrive if the cycle is regular. Recording the symptoms of self can be helpful to find out the pattern of premenstrual symptoms.

5.2. Premenstrual Syndrome

Premenstrual syndrome, also known as PMS, is a collection of bodily or emotional symptoms that appear before your monthly menstruation. The symptoms start one to two weeks before the start of menstruation and disappear in the first couple of days. A few days before your period, it is typical to have bloating, achy muscles, and sore breasts. These premenstrual symptoms are typical. However, PMS symptoms are those that affect your daily life. The hormonal changes that take place throughout the menstrual cycle are linked to PMS. It is still a mystery to doctors why some women experience premenstrual symptoms more severely than others.

Bloating, swollen and sore breasts, poor energy, headaches, cramps, and lower back pain are typical physical symptoms of PMS. It is also typical to experience sadness, rage, irritability, or anxiety. One to two weeks before the onset of your menstruation, symptoms may appear. Within the first several days of your period, these symptoms disappear. No one therapy is effective for everyone. Adapting your way of life might be beneficial. Healthy food, frequent exercise, and reducing alcohol and caffeine use are a few examples of these adjustments. After a few monthly cycles, if these adjustments do not help inreducing your symptoms, your doctor may recommend medication for bloating or severe PMS symptoms.

6. LIFESTYLE-RELATED DISEASES

The term “lifestyle diseases” refers to conditions whose development is mostly dependent on a person's daily routine and results from an unsuitable interaction between that person and their surroundings (Akseer et al., 2020). People are susceptible to a number of ailments that depend on their way of life and professional habits. Making nutritional and behavioral changes, and changing the environment can help minimize them. Lifestyle diseases are those whose occurrence is mostly influenced by people's daily activities and results from an inappropriate relationship that exists between humans and their surroundings (Nguyen et al., 2015).

These chronic illnesses creep up on you, take years to emerge, and are challenging to cure once they do. Poor food behaviors, inactivity, bad physique, and generally circadian clock are the primary root causes of lifestyle ailments. Studies show that individuals who emigrate from one nation to another often become prone to cancer, suggesting the role of environment. The main reasons for the variance in cancer rates among nations are not hereditary factors. The dietary habits of various groups may have an impact on the incidence of cancer (Age limits and adolescents., 2003).

Today, diseases associated with lifestyles are a major global public health concern. The World Health Organisation (WHO) estimated that in 2005, lifestyle-related illnesses caused 35 million deaths, or 61 percent of all fatalities, and 49 percent of the global disease burden. By 2030, it is anticipated that 56 percent of the world's population will have a medical condition and that diseases associated with lifestyles will be responsible for seventy percent of all fatalities. The largest increase is anticipated in Africa and the Eastern Mediterranean (United Nations Youth., 2015).

The adult population has been the center of the conversation about attempts to combat lifestyle-related illnesses thus far, with teenagers receiving little attention. The young population is typically seen as being in good health, and since lifestyle-related disorders are sometimes referred to as “chronic illnesses”, limited attempts have been made to evaluate their health, disease prevention, and lifestyle modification. But teens bear a disproportionately large burden of the world's lifestyle-related ailments (King et al., 2009; Sharma et al., 2009).

Youth worldwide are at significant risk of lifestyle-related illnesses, the most prevalent of which are conduct disorders and mental health conditions, including depression in both sexes. Our findings indicate that these modifiable factors that begin in youth are responsible for a significant amount of the economic burden of lifestyle-associated disorders in adults (Amy et al., 2012). The prevalence of illness among teens is significantly influenced by nearby behavioral and lifestyle risk factors. The primary causes of lifestyle illnesses in adults are poor diets, smoking, excessive alcohol consumption, drug use, and symptoms of metabolic conditions (high cardiovascular disease, elevated cholesterol level, and diabetes), and the risks of each of these frequently begin in adolescence (Lichtenstein et al., 2000).

By gender and geography, there are significant differences in the risk and protective factors for lifestyle illnesses among teenagers, including alcohol consumption, smoking, being stationary and jobless, and being overweight. These findings are in line with past empirical research on young populations' susceptibility to disease, indicators of risk, and beneficial behaviors (Supplement NZ-WMW., 1990). It also draws attention to the necessity of reducing the current burden of lifestyle illnesses among youth and preventing substantial adult morbidity and death associated with chronic illnesses acquired early in life. The discrepancies and trends highlight the need for policies and programs to be developed at the regional and national levels that particularly address the main causes of the financial strain due to chronic illnesses.

Additional significant intermediate variables that significantly contribute to lifestyle-related diseases among teenagers include infrastructure like urbanization and access to power, resources like health spending and personnel for wellness, equality by gender, and empowering young people. The relevance of underlying macro-level determinants is highlighted by these findings, which throw doubt on the generally accepted belief that individual risk factors and livelihood safeguards are the primary causes of lifestyle-related disorders (Patton et al., 2016). Additionally, several research studies have shown associations between mortality, morbidity, risk factors, and protective variables among adolescents and larger economic and social variables of health.

CONCLUSION

Teenagers are not exempted from chronic diseases. Teenagers also suffer from chronic noncommunicable diseases that have largely gone untreated by the worldwide community, including cardiovascular disease, hypertension, diabetes, and chronic respiratory disorders.

National efforts must include the detection and treatment of noncommunicable diseases and other chronic medical conditions in adolescents. By properly counseling parents and teenagers, behavioral risk factors, including smoking, drinking alcohol, insufficient exercise, sitting about, and eating poorly, may be controlled. When the entire family is willing to make a change and embrace healthy behaviors, such habits are more likely to be disregarded. Counseling strategies should be used to control smoking and other usage of tobacco. With the right guidance, parents and teenagers may be taught how to encourage a healthy diet and regular exercise, how to avoid accidents, and how to abstain from using cigarettes, alcohol, and other drugs. It isalso critical to understand genetic risk factors like increased sensitivity to light. Such young people's families should be encouraged to embrace healthy lifestyles that include frequent physical activity and fewer sedentary pursuits.

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Emotional and Cognitive Development in Adolescents

Sowmya Kumar1,Athira R. Nath1,Shubha1,Santosh Anand2,*
1 Department of Life Sciences, Mount Carmel College, Bengaluru, Karnataka, India
2 Department of Biotechnology, School of Applied Sciences, REVA University, Bengaluru, Karnataka, India

Abstract