Vincent Onywera
Biographic Data
| ID | 6680175 |
|---|---|
| NAME | Vincent Onywera |
| GIVEN NAMES | Vincent |
| FAMILY NAME | Onywera |
| SIGNATURE | ONYWERA V |
| AFFILIATIONS | Kenyatta University |
| ORCID | 0000-0001-8351-4696 |
| VERIFIED | Yes |
| TOTAL WORKS | 16 |
| TOTAL CITATIONS | 2 |
| WORKS AS AUTHOR | 16 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 2013 |
| LATEST PUBLICATION YEAR | 2025 |
| H-INDEX | 1 |
Differences Between Health- and Skill-Related Physical Fitness Profiles of Kenyan Children from Urban and Rural Areas
Physical fitness is a key indicator of children's health, yet amidst rising inactivity and obesity, data on Kenyan children are scarce. This study assessed health- and skill-related fitness differences between rural and urban Kenyan children while examining demographic influences. Cardiorespiratory fitness (CRF), BMI, strength, flexibility, speed, agility, and coordination were assessed in 1131 children aged 11.07 ± 0.9 years (52.7% girls) recrui…
Wealth and obesity in pre-adolescents and their guardians
The prevalence of non-communicable diseases is increasing in lower-middle-income countries as these countries transition to unhealthy lifestyles. The transition is mostly predominant in urban areas. We assessed the association between wealth and obesity in two sub-counties in Nairobi City County, Kenya, in the context of family and poverty. This cross-sectional study was conducted among of 9–14 years old pre-adolescents and their guardians living…
Low leptin levels are associated with elevated physical activity among lean school children in rural Tanzania
Our cross-sectional field study is the first that supports the hypothesis of low leptin levels as a potential endocrine trigger of high PA in lean children of a LMIC. We observed early signs of a PA transition towards a less active lifestyle in a subgroup residing in areas with better infrastructure that concomitantly tended to have higher leptin concentrations. Considering that area-dependent PA differences were more pronounced among girls than …
Parental-perceived home and neighborhood environmental correlates of accelerometer-measured physical activity among school-going children in Uganda
The benefits of physical activity (PA) on children’s health and well-being are well established. However, many children do not meet the PA recommendations, increasing their risk of being overweight, obese, and non-communicable diseases. Environmental characteristics of homes and neighborhoods may constrain a child’s ability to engage in PA, but evidence is needed to inform country-specific interventions in understudied low-income countries. This …
Breastfeeding and childhood obesity
This study aimed to examine the association between breastfeeding and childhood obesity. A multinational cross-sectional study of 4,740 children aged 9-11 years was conducted from 12 countries. Infant breastfeeding was recalled by parents or legal guardians. Height, weight, waist circumference, and body fat were obtained using standardized methods. The overall prevalence of obesity, central obesity, and high body fat were 12.3%, 9.9%, and 8.1%, r…
Association between breakfast frequency and physical activity and sedentary time
The International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE) is registered at (Identifier NCT01722500 )
Development and convergent validity of new self-administered questionnaires of active transportation in three African countries
The questionnaires provided valid information on the number of trips to/from various destinations and show acceptable and modest convergent validity for measuring barriers to active transport in a sample of children from three African countries. These questionnaires may be suitable for future research on active transport among school children in Sub-Saharan African countries
Sleep patterns and sugar-sweetened beverage consumption among children from around the world
Objective To examine the relationships between objectively measured sleep patterns (sleep duration, sleep efficiency and bedtime) and sugar-sweetened beverage (SSB) consumption (regular soft drinks, energy drinks, sports drinks and fruit juice) among children from all inhabited continents of the world. Design Multinational, cross-sectional study. Setting The International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE). Subject…
Socioeconomic status and dietary patterns in children from around the world
This study provides evidence of diet-SES gradients across all levels of human development and that lower within-country SES is strongly related to unhealthy dietary patterns. Consistency in within-country diet-SES gradients suggest that interventions and public health strategies aimed at improving dietary patterns among children may be similarly employed globally. However, future studies should seek to replicate these findings in more representat…
Associations of neighborhood social environment attributes and physical activity among 9–11 year old children from 12 countries
Assessment of Physical Fitness Status of Athletes with Intellectual Disabilities Participating in Special Olympics Programs in Nairobi County, Kenya
Information on the fitness status of people with disabilities in Kenya is scanty, particularly for those who participate in Special Olympics sports. The study aimed to assess the physical fitness level of athletes with Intellectual Disability participating in the Special Olympics program in Nairobi region and compare their fitness levels across different centers and gender, using the commonly used race-specific percentiles. A total of 208 childre…
Global Matrix 2.0
The Active Healthy Kids Global Alliance organized the concurrent preparation of Report Cards on the physical activity of children and youth in 38 countries from 6 continents (representing 60% of the world’s population). Nine common indicators were used (Overall Physical Activity, Organized Sport Participation, Active Play, Active Transportation, Sedentary Behavior, Family and Peers, School, Community and the Built Environment, and Government Stra…
Proportion of children meeting recommendations for 24-hour movement guidelines and associations with adiposity in a 12-country study
BACKGROUND: The Canadian 24-h movement guidelines were developed with the hope of improving health and future health outcomes in children and youth. The purpose of this study was to evaluate adherence to the 3 recommendations most strongly associated with health outcomes in new 24-h movement guidelines and their relationship with adiposity (obesity and body mass index z-score) across countries participating in the International Study of Childhood…
Correlates of objectively measured overweight/obesity and physical activity in Kenyan school children
This study provided the evidence for an existing prevalence of childhood overweight/obesity in Nairobi. Children were spending a considerable amount of time in sedentary and light intensity physical activity, with few meeting physical activity guidelines. Higher socioeconomic status and parental education attainment were associated with a higher likelihood of children being overweight/obese and a lower likelihood of children meeting the physical …
Direct and self-reported measures of physical activity and sedentary behaviours by weight status in school-aged children
The results of this study found a number of differences in the accumulation of MVPA and sedentary time by weight status and weak-to-moderate correlations between self-report and direct measures of weekday and weekend-day physical activity among the under/healthy weight children
The International Study of Childhood Obesity, Lifestyle and the Environment (Iscole)
The results of this study will provide a robust examination of the correlates of adiposity and obesity in children, focusing on both sides of the energy balance equation. The results will also provide important new information that will inform the development of lifestyle, environmental, and policy interventions to address and prevent childhood obesity that may be culturally adapted for implementation around the world. ISCOLE represents a multi-n…
The International Study of Childhood Obesity, Lifestyle and the Environment (Iscole)
The results of this study will provide a robust examination of the correlates of adiposity and obesity in children, focusing on both sides of the energy balance equation. The results will also provide important new information that will inform the development of lifestyle, environmental, and policy interventions to address and prevent childhood obesity that may be culturally adapted for implementation around the world. ISCOLE represents a multi-n…
Correlates of objectively measured overweight/obesity and physical activity in Kenyan school children
This study provided the evidence for an existing prevalence of childhood overweight/obesity in Nairobi. Children were spending a considerable amount of time in sedentary and light intensity physical activity, with few meeting physical activity guidelines. Higher socioeconomic status and parental education attainment were associated with a higher likelihood of children being overweight/obese and a lower likelihood of children meeting the physical …
Direct and self-reported measures of physical activity and sedentary behaviours by weight status in school-aged children
The results of this study found a number of differences in the accumulation of MVPA and sedentary time by weight status and weak-to-moderate correlations between self-report and direct measures of weekday and weekend-day physical activity among the under/healthy weight children
Global Matrix 2.0
The Active Healthy Kids Global Alliance organized the concurrent preparation of Report Cards on the physical activity of children and youth in 38 countries from 6 continents (representing 60% of the world’s population). Nine common indicators were used (Overall Physical Activity, Organized Sport Participation, Active Play, Active Transportation, Sedentary Behavior, Family and Peers, School, Community and the Built Environment, and Government Stra…
Proportion of children meeting recommendations for 24-hour movement guidelines and associations with adiposity in a 12-country study
BACKGROUND: The Canadian 24-h movement guidelines were developed with the hope of improving health and future health outcomes in children and youth. The purpose of this study was to evaluate adherence to the 3 recommendations most strongly associated with health outcomes in new 24-h movement guidelines and their relationship with adiposity (obesity and body mass index z-score) across countries participating in the International Study of Childhood…
Socioeconomic status and dietary patterns in children from around the world
This study provides evidence of diet-SES gradients across all levels of human development and that lower within-country SES is strongly related to unhealthy dietary patterns. Consistency in within-country diet-SES gradients suggest that interventions and public health strategies aimed at improving dietary patterns among children may be similarly employed globally. However, future studies should seek to replicate these findings in more representat…
Associations of neighborhood social environment attributes and physical activity among 9–11 year old children from 12 countries
Assessment of Physical Fitness Status of Athletes with Intellectual Disabilities Participating in Special Olympics Programs in Nairobi County, Kenya
Information on the fitness status of people with disabilities in Kenya is scanty, particularly for those who participate in Special Olympics sports. The study aimed to assess the physical fitness level of athletes with Intellectual Disability participating in the Special Olympics program in Nairobi region and compare their fitness levels across different centers and gender, using the commonly used race-specific percentiles. A total of 208 childre…
Development and convergent validity of new self-administered questionnaires of active transportation in three African countries
The questionnaires provided valid information on the number of trips to/from various destinations and show acceptable and modest convergent validity for measuring barriers to active transport in a sample of children from three African countries. These questionnaires may be suitable for future research on active transport among school children in Sub-Saharan African countries
Sleep patterns and sugar-sweetened beverage consumption among children from around the world
Objective To examine the relationships between objectively measured sleep patterns (sleep duration, sleep efficiency and bedtime) and sugar-sweetened beverage (SSB) consumption (regular soft drinks, energy drinks, sports drinks and fruit juice) among children from all inhabited continents of the world. Design Multinational, cross-sectional study. Setting The International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE). Subject…
Association between breakfast frequency and physical activity and sedentary time
The International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE) is registered at (Identifier NCT01722500 )
Breastfeeding and childhood obesity
This study aimed to examine the association between breastfeeding and childhood obesity. A multinational cross-sectional study of 4,740 children aged 9-11 years was conducted from 12 countries. Infant breastfeeding was recalled by parents or legal guardians. Height, weight, waist circumference, and body fat were obtained using standardized methods. The overall prevalence of obesity, central obesity, and high body fat were 12.3%, 9.9%, and 8.1%, r…
Parental-perceived home and neighborhood environmental correlates of accelerometer-measured physical activity among school-going children in Uganda
The benefits of physical activity (PA) on children’s health and well-being are well established. However, many children do not meet the PA recommendations, increasing their risk of being overweight, obese, and non-communicable diseases. Environmental characteristics of homes and neighborhoods may constrain a child’s ability to engage in PA, but evidence is needed to inform country-specific interventions in understudied low-income countries. This …
Low leptin levels are associated with elevated physical activity among lean school children in rural Tanzania
Our cross-sectional field study is the first that supports the hypothesis of low leptin levels as a potential endocrine trigger of high PA in lean children of a LMIC. We observed early signs of a PA transition towards a less active lifestyle in a subgroup residing in areas with better infrastructure that concomitantly tended to have higher leptin concentrations. Considering that area-dependent PA differences were more pronounced among girls than …
Wealth and obesity in pre-adolescents and their guardians
The prevalence of non-communicable diseases is increasing in lower-middle-income countries as these countries transition to unhealthy lifestyles. The transition is mostly predominant in urban areas. We assessed the association between wealth and obesity in two sub-counties in Nairobi City County, Kenya, in the context of family and poverty. This cross-sectional study was conducted among of 9–14 years old pre-adolescents and their guardians living…
Differences Between Health- and Skill-Related Physical Fitness Profiles of Kenyan Children from Urban and Rural Areas
Physical fitness is a key indicator of children's health, yet amidst rising inactivity and obesity, data on Kenyan children are scarce. This study assessed health- and skill-related fitness differences between rural and urban Kenyan children while examining demographic influences. Cardiorespiratory fitness (CRF), BMI, strength, flexibility, speed, agility, and coordination were assessed in 1131 children aged 11.07 ± 0.9 years (52.7% girls) recrui…
Medicine (16 works) · Obesity, Physical Activity, Diet (13 works) · Demography (11 works) · Environmental health (11 works) · Obesity (10 works) · Demography (8 works) · Children's Physical and Motor Development (7 works) · Overweight (7 works) · Physical therapy (7 works) · Physical activity (6 works)