Han C G Kemper

• PhD
• Amsterdam University Medical Center

Background Adiposity can be measured using BMI (which is based on weight and height) as well as indices of abdominal adiposity. We examined the association between BMI and waist-to-height ratio (WHtR) within and across populations of different world regions and quantified how well these two metrics discriminate between people with and without hyper...

The Developmental Origins of Health and Disease hypothesis (DOHaD) proposes that growth during the prenatal period might play a critical role in health, affecting the development of diseases, such as osteoporosis. Bone health is particularly affected by human behaviors when sports participation constitutes the main manifestation of physical exercis...

Summary Background Underweight and obesity are associated with adverse health outcomes throughout the life course. We estimated the individual and combined prevalence of underweight or thinness and obesity, and their changes, from 1990 to 2022 for adults and school-aged children and adolescents in 200 countries and territories. Methods We used data...

Non-communicable diseases (NCDs) have been a growing concern globally, with their prevalence escalating at an alarming rate. While many studies have been conducted on NCDs in Africa, very few have investigated the longitudinal development of cardio-metabolic risk factors. Therefore, the aim of this study was to review the literature on studies whic...

Hypertension and obesity have been a growing concern globally. Their prevalence continues to escalate, affecting a lot of people, especially in cold seasons. This leads to high mortality in cold seasons due to the increased prevalence of non-communicable diseases. This study investigated seasonal variation in blood pressure and visceral fat indices...

Optimal growth and development in childhood and adolescence is crucial for lifelong health and well-being1–6 . Here we used data from 2,325 population-based studies, with measurements of height and weight from 71 million participants, to report the height and body-mass index (BMI) of children and adolescents aged 5–19 years on the basis of rural an...

Osteoporosis is a public health problem, which negatively impacts society and national health services worldwide. Altered mineralization of the skeleton can be caused by persistent vitamin D deficiency. However, the combined impact of both on bone health is still under investigation. In fact, although there is compelling evidence in the literature...

Background Regular sport has favourable influence on the physical and mental state. Our aim was to analyse the relationship between regular sport activities, body parameters, cortisol level, perceived stress and the frequency of psychosomatic symptoms in male and female university students. Methods Subjects were university students ( N = 200). The...

Background: The purpose of our study was to compare the physiological effects of extreme physical and psychological stress tests in male soccer players, since these two types of stress apply to athletes with high performance requirements. Methods: A total of 63 healthy male soccer players participated in this study, all of whom underwent both of...

Background: Continuously rising performances in elite adolescent athletes requires increasing training loads. This training overload without professional monitoring, could lead to overtraining in these adolescents. Methods: 31 elite adolescent athletes (boys: n = 19, 16 yrs; girls: n = 12, 15 yrs) participated in a field-test which contained a u...

Background Hypertension can be detected at the primary health-care level and low-cost treatments can effectively control hypertension. We aimed to measure the prevalence of hypertension and progress in its detection, treatment, and control from 1990 to 2019 for 200 countries and territories. Methods We used data from 1990 to 2019 on people aged 30...

The objective of this study was to identify predictors of 12-month areal bone density accrual in different body segments, lean soft tissue, and osteogenic characteristics attributed to sports participation among adolescent girls and boys. Adolescents (Girls [n=64], [aged=14.7]); Boys [n=129], [aged=14.6]) were stratified into three groups according...

From 1985 to 2016, the prevalence of underweight decreased, and that of obesity and severe obesity increased, in most regions, with significant variation in the magnitude of these changes across regions. We investigated how much change in mean body mass index (BMI) explains changes in the prevalence of underweight, obesity, and severe obesity in di...

From 1985 to 2016, the prevalence of underweight decreased, and that of obesity and severe obesity increased, in most regions, with significant variation in the magnitude of these changes across regions. We investigated how much change in mean body mass index (BMI) explains changes in the prevalence of underweight, obesity, and severe obesity in di...

Background Comparable global data on health and nutrition of school-aged children and adolescents are scarce. We aimed to estimate age trajectories and time trends in mean height and mean body-mass index (BMI), which measures weight gain beyond what is expected from height gain, for school-aged children and adolescents. Methods For this pooled ana...

Background: Evidence is lacking on the effects of binge alcohol consumption on metabolic syndrome in the rural South African population. The purpose of this study was to investigate the association between binge drinking and components of metabolic syndrome (MetS) amongst Ellisras rural young adults aged 21 to 31 years who are part of the Ellisras...

In this review, the career of a pediatric exercise physiologist (HCGK) is given over a period of almost 50 years. His research was concentrated on the relationship of physical activity (physical education, sport, and daily physical activity) with health and fitness in teenagers in secondary schools. (1) His first experiment was an exercise test on...

Objective: To systematically review the literature to verify the relationship between neuromuscular fitness indicators in childhood/adolescence and bone strength variables in adulthood. Data sources: A systematic review was conducted in PUBMED, SCOPUS, SPORTDiscus, Web of Science, PsycINFO, LILACS, and SciELO, covering the entire period until Marc...

To analyze the impact of participation in sports with different cardiorespiratory fitness (CRF) demands on changes in metabolic and cardiovascular markers in adolescents. Longitudinal study with 12 months of follow‐up (Analysis of Behaviors of Children During Growth [ABCD Growth Study]). Overall, 184 adolescents (age 15.6 ± 2.1) were classified acc...

The harm alcohol abuse does to physical and mental health is well established. The perception of cardiovascular disease risk factors and alcohol use requires attention. This study aims to investigate the association between alcohol usage and knowledge of cardiovascular diseases (CVDs) risk factors among Ellisras rural adolescents and young adults a...

Objectives: The aim of the study was to determine which anthropometric indices can best predict the presence of common cardiovascular risk factors among young adults in the rural village of Ellisras in the Limpopo Province, South Africa. Methods: A total of 624 young adults (306 males and 318 females) aged 18 to 29 years took part in this cross-...

Background: Three important results came from the Amsterdam Growth and Health Longitudinal Study (AGAHLS). This study followed three birth cohorts (1962, 1963 and 1964) of boys and girls in the Amsterdam region in the Netherlands. The follow-up period was 25 years, with 10 measurements from age 12 to 42 years. The main purpose of the AGAHLS was to...

Background: Sports participation plays an important role in bone gain during childhood and adolescence. The aim here was to identify sex-related determinants of bone mineral density (BMD) differences between male and female adolescents, with emphasis on the role of sports participation. Design and setting: Longitudinal study conducted in a publi...

Body-mass index (BMI) has increased steadily in most countries in parallel with a rise in the proportion of the population who live in cities1,2. This has led to a widely reported view that urbanization is one of the most important drivers of the global rise in obesity3–6. Here we use 2,009 population-based studies, with measurements of height and...

Background: To compare bone density accrual and markers of bone geometry and formation between female adolescents engaged and not engaged in artistic gymnastics (AGs). Methods: This was a 12-month longitudinal study involving 20 female adolescents, including 10 controls and 10 gymnasts (AGs) aged 11 to 16 years. At baseline, the gymnasts had a m...

The main aim of this study was to compare anthropometric and physical fitness indicators of boys of the same chronical age but with different fat percentages. Subjects were Hungarian boys aged 9–13 years (N = 6919). Anthropometry was measured according the guidelines of the International Biological Program. Relative body fat was estimated by Drinkw...

PROCEEDINGS

Physical activity plays an important role in the prevention of chronic lifestyle-related diseases. The development of valid instruments for the assessment of physical activity remains a challenge in field studies. The purpose of the present study was therefore to determine the level of agreement between physical activity objectively measured by the...

Change in the prevalence of raised blood pressure could be due to both shifts in the entire distribution of blood pressure (representing the combined effects of public health interventions and secular trends) and changes in its high-blood-pressure tail (representing successful clinical interventions to control blood pressure in the hypertensive pop...

Background: Change in the prevalence of raised blood pressure could be due to both shifts in the entire distribution of blood pressure (representing the combined effects of public health interventions and secular trends) and changes in its high-blood-pressure tail (representing successful clinical interventions to control blood pressure in the hype...

Conclusion: Inflammation decreased in adolescents engaged in organized sports, independently of trunk fatness and biological maturation. Moreover, inflammation was related to arterial thickening only in adolescents not engaged in sports. What is Known: • Intima media thickness is a relevant marker of cardiovascular disease in pediatric groups, bei...

Background: Change in the prevalence of raised blood pressure could be due to both shifts in the entire distribution of blood pressure (representing the combined effects of public health interventions and secular trends) and changes in its high-blood-pressure tail (representing successful clinical interventions to control blood pressure in the hyp...

Het handhaven van een constant lichaamsgewicht is het resultaat van een balans in de energiewisseling. Veel energie en relatief veel vet wordt gebruikt tijdens matig intensieve lichamelijke activiteiten die met grote spiergroepen worden uitgevoerd en lang kunnen worden volgehouden. Personen met overgewicht kunnen het best afvallen door een combinat...

AIM The aim of this longitudinal study was to analyze the relationship between sleep disorder and intima-media thickness. METHOD Baseline measurements included carotid intima-media thickness, assessed by an ultrasound device; questionnaires about sleep and other behavioral variables; physical activity was measured by pedometer; body fatness was es...

Underweight, overweight, and obesity in childhood and adolescence are associated with adverse health consequences throughout the life-course. Our aim was to estimate worldwide trends in mean body-mass index (BMI) and a comprehensive set of BMI categories that cover underweight to obesity in children and adolescents, and to compare trends with those...

BACKGROUND:Underweight, overweight, and obesity in childhood and adolescence are associated with adverse health consequences throughout the life-course. Our aim was to estimate worldwide trends in mean body-mass index (BMI) and a comprehensive set of BMI categories that cover underweight to obesity in children and adolescents, and to compare trends...

Worldwide trends in body-mass index, underweight, overweight, and obesity from 1975 to 2016: a pooled analysis of 2416 population-based measurement studies in 128•9 million children, adolescents, and adults NCD Risk Factor Collaboration (NCD-RisC)* Summary Background Underweight, overweight, and obesity in childhood and adolescence are associated w...

Background Underweight, overweight, and obesity in childhood and adolescence are associated with adverse health consequences throughout the life-course. Our aim was to estimate worldwide trends in mean body-mass index (BMI) and a comprehensive set of BMI categories that cover underweight to obesity in children and adolescents, and to compare tr...

Haptotherapy is a relatively new therapy with little sound scientific research to substantiate its effectiveness on health and well being of the clients. Unbiased and well-controlled research is sorely needed. In this article, a few research-related topics will be discussed with regard to haptotherapeutic treatment. The five topics to be discussed,...

The aim of this cross-sectional study was to investigate the association between birth weight, underweight, and blood pressure (BP) among Ellisras rural children aged between 5 and 15 years. Data were collected from 528 respondents who participated in the Ellisras Longitudinal Study (ELS) and had their birth weight recorded on their health clinic c...

Purpose: To compare bone mineral density gains in adolescents of both genders stratified according to different martial art styles in a 9-month follow-up study. Methods: The longitudinal study consisted of 29 adolescents of both genders and age between 11 and 17 years stratified into control group ([CG] not engaged in any sport) and 50 fighters...

Background: : The 2016 Dar Es Salaam Call to Action on Diabetes and Other non-communicable diseases (NCDs) advocates national multi-sectoral NCD strategies and action plans based on available data and information from countries of sub-Saharan Africa and beyond. We estimated trends from 1980 to 2014 in age-standardized mean body mass index (BMI) an...

CONTEXT AND OBJECTIVE: Peak height velocity (PHV) is an important maturational event during adolescence that affects skeleton size. The objective here was to compare bone variables in adolescents who practiced different types of sports, and to identify whether differences in bone variables attributed to sports practice were dependent on somatic mat...

Low cardiorespiratory fitness and inactivity are strong health predictors associated with excessive fatness. The objective of this study was to determine the associations between physical activity (PA) and cardiorespiratory fitness and body fatness in South African adolescents. A cross-sectional study was performed with a subsample of 149 school-go...

Comprehensive and up to date, this textbook on children’s sport and exercise medicine features research and practical experience of internationally recognized scientists and clinicians that informs and challenges readers. Four sections—Exercise Science, Exercise Medicine, Sport Science, and Sport Medicine—provide a critical, balanced, and thorough...

Unhealthy lifestyle characteristics such as low physical activity (PA) and high plasma glucose levels (PGLs) may lead to the development of type 2 diabetes mellitus in adulthood. The aim of this study was to investigate (i) the level of physical activity; (ii) the prevalence of pre-diabetes and (iii) the relationship between PA and plasma glucose l...

Peak oxygen uptake (peak V ˙ O 2 ) measured by clinical exercise testing is the benchmark for aerobic fitness. Aerobic fitness, estimated from maximal treadmill exercise, is a predictor of mortality in adults. Peak V ˙ O 2 was shown to predict longevity in patients aged 7–35 years with cystic fibrosis over 25 years ago. A surge of exercise studies...

Background: Raised blood pressure is an important risk factor for cardiovascular diseases and chronic kidney disease. We estimated worldwide trends in mean systolic and mean diastolic blood pressure, and the prevalence of, and number of people with, raised blood pressure, defined as systolic blood pressure of 140 mm Hg or higher or diastolic blood...

Background Raised blood pressure is an important risk factor for cardiovascular diseases and chronic kidney disease. We estimated worldwide trends in mean systolic and mean diastolic blood pressure, and the prevalence of, and number of people with, raised blood pressure, defined as systolic blood pressure of 140 mm Hg or higher or diastolic blood p...

The objective of the present study was to investigate the effects of different sports on stress fractures among adolescents during a 9-month follow-up period. The sample was composed of 184 adolescents divided into three groups (impact sports [n = 102]; swimming [n = 35]; non-sports [n = 47]). The occurrence of stress fracture was reported by parti...

Objective: The aim of this study was to analyse whether changes in physical activity and body fatness are related to modifications in cardiovascular risk factors among adolescents. Material and methods A sample of 89 healthy adolescents was recruited for this study. We assessed habitual physical activity, body fat percentage, arterial thickness, b...

Being taller is associated with enhanced longevity, and higher education and earnings. We reanalysed 1472 population-based studies, with measurement of height on more than 18.6 million participants to estimate mean height for people born between 1896 and 1996 in 200 countries. The largest gain in adult height over the past century has occurred in S...

Being taller is associated with enhanced longevity, and higher education and earnings. We reanalysed 1472 population-based studies, with measurement of height on more than 18.6 million participants to estimate mean height for people born between 1896 and 1996 in 200 countries. The largest gain in adult height over the past century has occurred in S...

Being taller is associated with enhanced longevity, and higher education and earnings. We reanalysed 1472 population-based studies, with measurement of height on more than 18.6 million participants to estimate mean height for people born between 1896 and 1996 in 200 countries. The largest gain in adult height over the past century has occurred in S...

Summary Background Underweight and severe and morbid obesity are associated with highly elevated risks of adverse health outcomes. We estimated trends in mean body-mass index (BMI), which characterises its population distribution, and in the prevalences of a complete set of BMI categories for adults in all countries. Methods We analysed, with use...

Als er een begrip is dat met de dood verbonden is, dan is het wel ‘skelet’. Het skelet is uiteindelijk datgene wat overblijft als het leven geweken is. Duurzaam en onverwoestbaar lijkt het, maar meer niet. Dat is een misvatting, want het skelet mag dan inderdaad duurzaam en slijtvast zijn, onverwoestbaar is het al tijdens ons leven zeker niet (Lips...

Het vermogen van kinderen om lichamelijke prestaties te leveren, is afhankelijk van de soort prestatie en de daarmee samenhangende fysiologische systemen (zie hoofdstuk 4). Bij gymnastische oefeningen gaat het om spierkracht, snelheid, evenwicht en lenigheid. Deze functies worden geregeld door de hersenen en de spieren: samen het neuromusculair sys...

Zowel te veel als te weinig eten kan leiden tot gezondheidsproblemen en voor een individueel kind de kans vergroten op een gewichtsprobleem (Hills et al. 2008).

Er worden met betrekking tot jongeren dikwijls de volgende drie termen gebruikt: groei, rijping en ontwikkeling (Malina et al. 2004). Groei is een louter kwantitatief begrip: door groei ontstaat een toename in cellen en/of afmetingen van cellen (zoals spier- en hersencellen), van delen van het lichaam (zoals romp, hoofd en ledematen) of van het hel...

Een kind is geen verkleinde kopie van een volwassene. In de schilder- en beeldhouwkunst van verschillende oude culturen worden kinderen afgebeeld als miniatuurvolwassenen met een veel te klein hoofd en te lange armen en benen. Nog tot ver na de middeleeuwen worden kinderen als grote mensen in volwassen kleding afgebeeld.

In de voorgaande hoofdstukken is geprobeerd het belang van lichaamsbeweging voor groei, ontwikkeling en gezondheid van jongeren aan te tonen.

De definitie van lichamelijke activiteit is: elke lichaamsbeweging die wordt veroorzaakt door skeletspieren en die leidt tot een toename van het energiegebruik boven het energiegebruik van het lichaam in rust. Het energiegebruik van jongeren bestaat uit drie principiele componenten: het energiegebruik in rust, het thermische effect van voedsel en h...

Hoewel er sprake is van overlap tussen de begrippen ‘gezondheid’ en ‘fitheid’, zijn ze niet identiek. Wie fit is hoeft niet gezond te zijn en ook het omgekeerde geldt: wie gezond is, hoeft niet fit te zijn (zie figuur 4.1). Goedgetrainde sporters hebben een uitstekende fitheid. Afhankelijk van het soort training beschikken ze over een groot uithoud...

Tot de jaren zestig van de vorige eeuw richtte het wetenschappelijk onderzoek van gezondheid en bewegen zich voornamelijk op de jonge volwassenen en dan ook nog vooral op het mannelijke deel.

De inspiratie voor dit boek is afkomstig van mijn in 2005 overleden collega en vriend Oded Bar-Or. Met hem heb ik meer dan dertig jaar samengewerkt in een internationale wetenschappelijke groep van onderzoekers. Wij deelden elkaars bevlogenheid voor het onderzoeksterrein, getypeerd als het belang van lichaamsbeweging voor het kind.

Wat is nu precies de invloed van bewegen en sport op de gezondheid en fitheid van jongeren? Dit boek geeft actuele, wetenschappelijke informatie over fysiologische aspecten van groei, ontwikkeling en rijping van jongeren. Daarmee biedt het inzicht in de effecten van lichaamsbeweging op hun gezondheid. Fysiologische en anatomische verschillen tussen...

Obesity and low level of cardiorespiratory fitness are associated with high blood pressure in both adolescents and adults. The objective of this study was to assess the relationship of adiposity and cardiorespiratory fitness with resting blood pressure in 14-year-old male and female adolescents. Cross-sectional data on 310 adolescents (31.8% boys)...

The Canadian Assessment of Physical Literacy (CAPL) was conceptualized as a tool to monitor children's physical literacy. The original model (fitness, activity behavior, knowledge, motor skill) required revision and relative weights for calculating/interpreting scores were required. Nineteen childhood physical activity/fitness experts completed a 3...

To analyze the association between physical inactivity in different domains and direct public healthcare expenditures in adults and to identify whether the clustering of physical inactivity in different domains would contribute to increased public healthcare. The sample composed of 963 adults randomly selected in a middle-size Brazilian city. Annua...

Underweight and overweight are adverse effects of malnutrition and both are associated with negative health consequences in children and adolescents. In South Africa, the burden of economic and social disparity coexists with malnutrition in children. The purpose of this study was to review available South Africa studies regarding the comprehensive...

Introduction: It is not clear if early and current physical activity (even interrelated) constitute two independent variables and, thus, affecting independently health outcomes in adulthood. Objective: To analyze the relationship of early sport practice with hemodynamic variables and metabolic in adulthood. Methods: Participated in the study 69 men...

In children, levels of play, physical activity, and fitness are key indicators of health and disease and closely tied to optimal growth and development. Cardiopulmonary exercise testing (CPET) provides clinicians with biomarkers of disease and effectiveness of therapy, and researchers with novel insights into fundamental biological mechanisms refle...

A young woman showed a significant decrease in lumbar bone mass after one year of endurance running. She succeeded in running the Boston marathon. In spite of her lifestyle, that was supposed to be beneficial with a high calcium intake (1000 mg/day) and high weight bearing physical activities (7000 MET’s/week), she was not able to maintain lumbar b...

The Amsterdam Growth and Health Longitudinal Study (AGHLS) is a unique, multidisciplinary cohortstudy that was initially set up to examine growth and health among teenagers. Throughout the years, the AGHLS has aimed to answer research questions dealing with the relationships between the (natural) development of anthropometry, lifestyle and health f...

The use of tobacco products is the major cause of chronic diseases morbidity and mortality. Most smokers start the smoking habits from childhood and adolescent stages. This was a cross-sectional study. A total of 1654 subjects (854 boys and 800 girls), aged 11 to 18 years, who were part of the Ellisras Longitudinal Study completed the questionnaire...

Indirect causes of childhood obesity are complex and are sometimes linked to psychological factors, social expectation or pressure, and fat stigmatization. Obesity in children may also be somewhat attributed to psychological stress such as low esteem, poor peer acceptance, and low participation in social and sport activities. However, in some Afric...

A unique observational long-term study In a long follow-up period of 23 years about 600 teenagers were observed till their young adult age in order to investigate the longitudinal relationship between health and lifestyles considering physical activity, diet, smoking and alcohol consumption. Longitudinal studies with a follow-up lasting for a quart...

Hands can be a vector for transmitting pathogenic microorganisms to foodstuffs and drinks, and to the mouths of susceptible hosts. Hand washing is the primary barrier to prevent transmission of enteric pathogens via cross-contamination from infected persons. Conventional hand washing involves the use of water, soap, and friction to remove dirt and...

Individuals grow and accumulate central patterns of body fat into the diseases they will suffer from as older adults. The need to elicit the development and tracking of central patterns of body fat from younger age into adolescent remains to be explored. Skinfolds measurements were done according to the standard procedures in the Ellisras Longitudi...

This study aimed to compare neuromotor fitness test scores of 9-12-year-old Dutch youth in 2006 with scores of same aged children in 1980. Body height, body weight and performance on neuromotor fitness test items were measured in 2050 Dutch children from 9 to 12 years in 2006 and were compared with data of 2603 same aged Dutch children measured in...

Reduced bone mineral density (BMD), altered body composition, impaired motor performance and passive ankle dorsiflexion are side effects of acute lymphoblastic leukemia (ALL) treatment. We performed a randomized study investigating whether an exercise program could prevent these side effects. At diagnosis we randomized 51 ALL patients (median age:...

In a 15 year longitudinal study (Amsterdam Growth and Health Study) is evaluated the effect of daily calcium intake (CAI) during adolescence and young adulthood on the development of peak bone mass at age 27 when the influence of weight-bearing activity (WBA) and body weight was accounted for. A group of 84 males and 98 females were measured longit...

The purpose of this observational prospective cohort study was to investigate the development and tracking of body mass index (BMI) of Ellisras rural children from preschool age into late adolescence from the Ellisras Longitudinal Growth and Health Study. Heights and weights of children were measured according to the standard procedures recommended...

Reduction in bone mineral density (BMD), fractures, altered body composition, deteriorated motor performance and impaired passive ankle dorsiflexion are side-effects of chemotherapy during childhood acute lymphoblastic leukemia (ALL). Because only scarce information is available on the value of regular exercise to prevent these side-effects, we per...