Adam Dominic George Baxter‐jone
Datos Biográficos
| ID | 4355689 |
|---|---|
| NOMBRE | Adam Dominic George Baxter‐jone |
| NOMBRES | Adam Dominic George |
| APELLIDO | Baxter‐jone |
| FIRMA | JONE A D G B |
| AFILIACIONES | University of Saskatchewan |
| ORCID | 0000-0003-0430-0556 |
| VERIFICADO | Sí |
| TOTAL DE OBRAS | 34 |
| TOTAL DE CITAS | 7 |
| TOTAL COMO AUTOR | 34 |
| TOTAL COMO EDITOR | 0 |
| PRIMER AÑO DE PUBLICACIÓN | 1994 |
| AÑO MÁS RECIENTE DE PUBLICACIÓN | 2025 |
| ÍNDICE H | 1 |
Enhancement of a Mathematical Model for Predicting Puberty Stage in Boys
Background Previously, we developed a mathematical model capable of predicting pubertal development (PD) through seven anthropometric variables, with an accuracy of 75%. We believe that it is possible to develop a similar model that uses fewer anthropometric measurements and provides greater precision. Objective Develop a mathematical model capable of predicting PD through anthropometric variables. Methods We evaluated the anthropometric profile …
Site and sex specific bone mineral content, and density trajectories from adolescence through to 15 years post peak bone mass
Comparing the change to the precision of the instrument it was found that males and females showed real change in BMC at the TB, LS and TH but no real change at the FN from PBM to 15 years post PBM. In aBMD a real increase was found in TB and decrease in FN. Future studies should explore the roles of other factors, such as changes in lifestyle, related to bone mineral change after PBM attainment on bone trajectories
Professor Donald A. Bailey Jan 5 th 1934 to June 3 rd 2023
This is an open Access article distributed under the terms of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use,distribution, and reproduction in any medium, provided the original work is properly cited. The terms on which this article has been published allow the posting of the Acceptedmanuscript in a repository by the author(s) or with their consent
Parents, Teachers, and Community
Increasing children's physical activity engagement has short- and long-term health benefits. Developing physical competence is a key component of children's engagement in physical activity. The purpose of our study was to assess if a 12-week home, school, and community-based physical literacy intervention improved the physical competence of children in kindergarten and grade one. Four schools were either assigned to receive the intervention (n = …
Modeling the Dynamics of Children’s Musculoskeletal Fitness
This study models children's musculoskeletal fitness (MSF) developmental trajectories and identifies individual differences related to effects of time-invariant, as well as time-varying covariates. A total of 348 Portuguese children (177 girls) from six age cohorts were followed for three years. MSF tests (handgrip strength, standing long jump and shuttle run), age, body mass index (BMI), socioeconomic status (SES), gross motor coordination (GMC)…
The effects of body size and training environment on the physical performance of adolescent basketball players
Leaner players have advantages in physical performance and individual characteristics play an important role, over and beyond club structure, in developing physical performance
Reliability of biological maturation analyses performed by equations predicting skeletal age and peak height velocity with hand and wrist X ‐ray results
BACKGROUND: Hand-wrist radiography is the gold standard for the assessment of skeletal age (SA) and the assignment of biological maturation (BM) status. However, its practical use in the field is questioned, prompting the development of anthropometric equations to estimate BM. However, there is no consensus on the reliability of these equations in relation to hand-wrist X-rays. OBJECTIVE: To test the reliability of the BM estimated from predictiv…
Tracking Technical Skill Development in Young Basketball Players
This study investigated developmental stability, or tracking, in the development of technical skills in youth male basketball players and retrospectively profiled stable and unstable tracking patterns over time. A total of 97 basketball players were tracked bi-annually over 3 consecutive years. Players were divided into two age-categories according to their age at baseline: under-12; and under-14. Technical skills were assessed using the American…
Body Physique, Body Composition, Physical Performance, Technical and Tactical Skills, Psychological Development, and Club Characteristics of Young Male Portuguese Soccer Players
Youth soccer performance is multifaceted, includes physical growth, biological maturation, and physical fitness, and is linked to the sporting environment to which the players are exposed. We aim to describe age-related associations in body physique, body composition, physical performance technical and tactical skills, psychological and club characteristics of male soccer players aged 12 to 14 years. A total of 157 male soccer players clustered i…
Muscular Strength Spurts in Adolescent Male Basketball Players
Although successful performance in basketball requires high levels of muscular strength during adolescence, its development is confounded by the effects of normal growth. We examine the timing, intensity and sequence of muscular strength according to biological age (years from peak height velocity (PHV)) and hypothesize that young basketball players attain their peak muscular strength spurts around PHV. A total of 160 adolescent male basketballer…
Sex differences in bone mineral content and bone geometry accrual
Context Girls’ and boys’ growth patterns differ in timing and tempo, and they have different lifestyles with regards to diet and physical activity. These factors have all been linked with bone mineral accrual.Objective To identify the associations of boys’ and girls’ growth, maturation, and lifestyle choices relating to parameters of bone geometry and mineral accrual.Methods Between 1991 and 1993, 251 children aged 8–15 years were recruited into …
Exploring the relationship between adolescent biological maturation, physical activity, and sedentary behaviour
While this review demonstrates some evidence for early maturational timing as a risk factor for disengagement from physical activity and increase in sedentary behaviours, the reviewed literature also demonstrates that this relationship is complex. Future research that tracks maturity-related variations in physical activity and sedentary behaviours over adolescence is warranted
Patterns of physical performance spurts during adolescence
Data relating physical performance to the timing of the adolescent growth spurt are limited. Aim: This study identifies: (i) age-at-peak height velocity (APHV), (ii) physical performance spurt patterns aligned to APHV; and (iii) cross-cultural and time patterns in Canadian, Brazilian and Portuguese boys. Subjects and methods: A total of 512 boys (131 Canadian, 250 Portuguese and 131 Brazilian), 8-17 years of age were followed serially using longi…
The role of growth and maturation during adolescence on team-selection and short-term sports participation
It was found that youth who attended sports team's try-outs were more likely to be born early in the selection year, be tall for their age, and in some sports early maturers. The majority of both the selected and deselected participants continued to participate in sport 36 months after try-outs, with the majority continuing to participate in their try-out sport
Are there gross motor coordination spurts during mid‐childhood
Objectives The aims of this study were (1) to identify the timing of the mid‐growth spurt (MGS) in stature in children and (2) to identify gross motor coordination (GMC) spurts when aligned by the age of attainment of the MGS (aMGS). Methods Stature, weight, and GMC were measured in 245 Portuguese children followed annually from 6 to 10 years. GMC was assessed and to estimate children's MGS in stature as well as GMC spurts in each of the four tes…
Development of Physical Performance Tasks during Rapid Growth in Brazilian Children
Growth and physical performance scores were studied around three years of attainment of peak height velocity (PHV). We aimed to estimate the age at peak velocity, or at peak rate, in physical performance tasks, and sex-differences when aligned by biological age. A total of 131 boys and 123 girls, 8 to 14 years of age were recruited from the Cariri region of Brazil. A mixed longitudinal design was used with four overlapping age cohorts: 8, 10, 12,…
Longitudinal patterns in BMI and percent total body fat from peak height velocity through emerging adulthood into young adulthood
OBJECTIVES: Emerging adulthood, a potential critical period, is an understudied period of fat mass accrual. The aim of this study was to describe patterns of fat mass accrual, and weight status, from adolescence, through emerging adulthood, into young adulthood. METHODS: One-hundred-eighteen participants (59 male) were measured repeatedly for 20 years. Annual measures of height, weight, and body composition (DXA) were taken. Calculated measures i…
At what age do normal weight Canadian children become overweight adults? Differences according to sex and metric
In summary, overweight onset occurs during young adulthood with the exception of WC in males. BMI in males and %FM in females were the metrics identifying overweight the earliest
A mixed-longitudinal study of children’s growth, motor development and cognition. Design, methods and baseline results on sex-differences
Baseline results from the GMDC-Vouzela study indicate the dynamic relationships between children's biological and environmental characteristics. They also highlight lifestyle traits that will most likely effect subsequent growth, motor and cognitive development
Fat Mass Centile Charts for Brazilian Children and Adolescents and the Identification of the Roles of Socioeconomic Status and Physical Fitness on Fat Mass Development
This paper presents fat mass centile charts for Brazilian youth and investigates the roles of socioeconomic status and physical fitness (PF) on fat mass (FM) development. Two northeast Brazilian samples were used: a cross-sectional sample of 3659 (1921 girls) aged 8 to 16 years and a mixed-longitudinal series of cohorts (8-10, 10-12, 12-14, 14-16 years) with 250 boys and 250 girls. A measure of somatic maturity was used as a marker of biological …
Height, weight, body composition, and waist circumference references for 7- to 17-year-old children from rural Portugal
Enhancing a Somatic Maturity Prediction Model
PURPOSE: Assessing biological maturity in studies of children is challenging. Sex-specific regression equations developed using anthropometric measures are widely used to predict somatic maturity. However, prediction accuracy was not established in external samples. Thus, we aimed to evaluate the fit of these equations, assess for overfitting (adjusting as necessary), and calibrate using external samples. METHODS: We evaluated potential overfitti…
Effects of Individual and School-Level Characteristics on a Child’s Gross Motor Coordination Development
The aim of this study was to identify child and school-level characteristics that explained inter-individual differences in gross motor coordination (GMC). Participants (n = 390), recruited from 18 Portuguese primary schools, were aged 6 to 10 years of age. Birth weight, body fat (BF), physical activity (PA), physical fitness (PF) and GMC were assessed. School size, setting, infrastructure and physical education classes were considered as school …
Clustering of body composition, blood pressure and physical activity in Portuguese families
The results suggest familial resemblance in the variation of body fat, BP and TPA, showing partial pleiotropic effects in the variation in body fat phenotypes and BP. TPA only shares common environmental influences with BP and body fat traits
Tracking of aerobic fitness from adolescence to mid-adulthood
Aerobic fitness has a low tracking between APHV and adulthood
Walkable for Whom? Examining the Role of the Built Environment on the Neighbourhood-based Physical Activity of Children
Site and sex specific bone mineral content, and density trajectories from adolescence through to 15 years post peak bone mass
Comparing the change to the precision of the instrument it was found that males and females showed real change in BMC at the TB, LS and TH but no real change at the FN from PBM to 15 years post PBM. In aBMD a real increase was found in TB and decrease in FN. Future studies should explore the roles of other factors, such as changes in lifestyle, related to bone mineral change after PBM attainment on bone trajectories
Menarche in intensively trained gymnasts, swimmers and tennis players
It has been hypothesized that young athletes, undertaking intensive training, have delayed menarche due to the effects of training at an early age, although it is known that other genetic and environmental factors contribute to this observed later menarche. As part of a longitudinal study of the effects of intensive training during puberty and adolescence we investigated age of menarche in 222 athletes and their mothers. All the sports studied (g…
Growth and development of male gymnasts, swimmers, soccer and tennis players
Elite adult athletes are known to have physical and physiological characteristics specifically suited to their sport. However, it is not clear whether the observed adult differences arise because of training or whether the sport selects the individual with the appropriate characteristics. The purpose of this prospective study was to compare and contrast the physical development of young athletes (8-19 years), and in so doing provide a possible re…
Secular trend in the development of fatness during childhood and adolescence
This study examined the development of fatness, as indexed by skinfold thickness, in healthy Caucasian children and adolescents residing in the same location in Canada in the 1960s and the 1990s. The data comes from two longitudinal studies, conducted approximately 30 years apart, of children aged 8–16 years. The first study (1964–1973) annually measured 207 males and 140 females. The second investigation (1991–1997) repeatedly measured 113 males…
A longitudinal analysis of sex differences in bone mineral accrual in healthy 8-19-year-old boys and girls
Although a statistical significant sex effect is observed, it is less than the error of the measurement, and thus sex difference are debatable. In general, sex difference are explained by anthropometric difference
Limitations to the use of secondary sex characteristics for gender comparisons
Boys and girls differ in the timing and tempo of somatic and sexual maturity. Thus boys and girls should not be aligned on secondary sex characteristics when controlling for the confounding effects of maturity
The influence of dance training on growth and maturation of young females
Results suggest that moderate-high levels of dance training do not affect linear growth and maturation. Thus, girls should not be discouraged from dance participation on the basis of potential growth delays
The relationship between body composition and onset of menarche
Data on 61 girls were retained for analysis. The range in BM, TBF and %BF at menarche was 50.10 kg, 35050.06 g and 31.61%, respectively. Reductions in variability of body fat and weight were not apparent at menarche, which does not provide support for the hypothesis that a critical body weight/fat is required for menarche
The relationship between girls’ (8–14 years) physical activity and maternal education
Research investigating the relationship between maternal education and child's physical activity should explore, at higher resolution, when activity is accumulated, in particular separating weekday and weekend physical activity
Walkable for Whom? Examining the Role of the Built Environment on the Neighbourhood-based Physical Activity of Children
Clustering of body composition, blood pressure and physical activity in Portuguese families
The results suggest familial resemblance in the variation of body fat, BP and TPA, showing partial pleiotropic effects in the variation in body fat phenotypes and BP. TPA only shares common environmental influences with BP and body fat traits
Tracking of aerobic fitness from adolescence to mid-adulthood
Aerobic fitness has a low tracking between APHV and adulthood
Height, weight, body composition, and waist circumference references for 7- to 17-year-old children from rural Portugal
Enhancing a Somatic Maturity Prediction Model
PURPOSE: Assessing biological maturity in studies of children is challenging. Sex-specific regression equations developed using anthropometric measures are widely used to predict somatic maturity. However, prediction accuracy was not established in external samples. Thus, we aimed to evaluate the fit of these equations, assess for overfitting (adjusting as necessary), and calibrate using external samples. METHODS: We evaluated potential overfitti…
Effects of Individual and School-Level Characteristics on a Child’s Gross Motor Coordination Development
The aim of this study was to identify child and school-level characteristics that explained inter-individual differences in gross motor coordination (GMC). Participants (n = 390), recruited from 18 Portuguese primary schools, were aged 6 to 10 years of age. Birth weight, body fat (BF), physical activity (PA), physical fitness (PF) and GMC were assessed. School size, setting, infrastructure and physical education classes were considered as school …
Fat Mass Centile Charts for Brazilian Children and Adolescents and the Identification of the Roles of Socioeconomic Status and Physical Fitness on Fat Mass Development
This paper presents fat mass centile charts for Brazilian youth and investigates the roles of socioeconomic status and physical fitness (PF) on fat mass (FM) development. Two northeast Brazilian samples were used: a cross-sectional sample of 3659 (1921 girls) aged 8 to 16 years and a mixed-longitudinal series of cohorts (8-10, 10-12, 12-14, 14-16 years) with 250 boys and 250 girls. A measure of somatic maturity was used as a marker of biological …
Longitudinal patterns in BMI and percent total body fat from peak height velocity through emerging adulthood into young adulthood
OBJECTIVES: Emerging adulthood, a potential critical period, is an understudied period of fat mass accrual. The aim of this study was to describe patterns of fat mass accrual, and weight status, from adolescence, through emerging adulthood, into young adulthood. METHODS: One-hundred-eighteen participants (59 male) were measured repeatedly for 20 years. Annual measures of height, weight, and body composition (DXA) were taken. Calculated measures i…
At what age do normal weight Canadian children become overweight adults? Differences according to sex and metric
In summary, overweight onset occurs during young adulthood with the exception of WC in males. BMI in males and %FM in females were the metrics identifying overweight the earliest
A mixed-longitudinal study of children’s growth, motor development and cognition. Design, methods and baseline results on sex-differences
Baseline results from the GMDC-Vouzela study indicate the dynamic relationships between children's biological and environmental characteristics. They also highlight lifestyle traits that will most likely effect subsequent growth, motor and cognitive development
Are there gross motor coordination spurts during mid‐childhood
Objectives The aims of this study were (1) to identify the timing of the mid‐growth spurt (MGS) in stature in children and (2) to identify gross motor coordination (GMC) spurts when aligned by the age of attainment of the MGS (aMGS). Methods Stature, weight, and GMC were measured in 245 Portuguese children followed annually from 6 to 10 years. GMC was assessed and to estimate children's MGS in stature as well as GMC spurts in each of the four tes…
Development of Physical Performance Tasks during Rapid Growth in Brazilian Children
Growth and physical performance scores were studied around three years of attainment of peak height velocity (PHV). We aimed to estimate the age at peak velocity, or at peak rate, in physical performance tasks, and sex-differences when aligned by biological age. A total of 131 boys and 123 girls, 8 to 14 years of age were recruited from the Cariri region of Brazil. A mixed longitudinal design was used with four overlapping age cohorts: 8, 10, 12,…
Exploring the relationship between adolescent biological maturation, physical activity, and sedentary behaviour
While this review demonstrates some evidence for early maturational timing as a risk factor for disengagement from physical activity and increase in sedentary behaviours, the reviewed literature also demonstrates that this relationship is complex. Future research that tracks maturity-related variations in physical activity and sedentary behaviours over adolescence is warranted
Patterns of physical performance spurts during adolescence
Data relating physical performance to the timing of the adolescent growth spurt are limited. Aim: This study identifies: (i) age-at-peak height velocity (APHV), (ii) physical performance spurt patterns aligned to APHV; and (iii) cross-cultural and time patterns in Canadian, Brazilian and Portuguese boys. Subjects and methods: A total of 512 boys (131 Canadian, 250 Portuguese and 131 Brazilian), 8-17 years of age were followed serially using longi…
The role of growth and maturation during adolescence on team-selection and short-term sports participation
It was found that youth who attended sports team's try-outs were more likely to be born early in the selection year, be tall for their age, and in some sports early maturers. The majority of both the selected and deselected participants continued to participate in sport 36 months after try-outs, with the majority continuing to participate in their try-out sport
Tracking Technical Skill Development in Young Basketball Players
This study investigated developmental stability, or tracking, in the development of technical skills in youth male basketball players and retrospectively profiled stable and unstable tracking patterns over time. A total of 97 basketball players were tracked bi-annually over 3 consecutive years. Players were divided into two age-categories according to their age at baseline: under-12; and under-14. Technical skills were assessed using the American…
Body Physique, Body Composition, Physical Performance, Technical and Tactical Skills, Psychological Development, and Club Characteristics of Young Male Portuguese Soccer Players
Youth soccer performance is multifaceted, includes physical growth, biological maturation, and physical fitness, and is linked to the sporting environment to which the players are exposed. We aim to describe age-related associations in body physique, body composition, physical performance technical and tactical skills, psychological and club characteristics of male soccer players aged 12 to 14 years. A total of 157 male soccer players clustered i…
Medicine (30 obras) · Demography (26 obras) · Demography (19 obras) · Psychology (17 obras) · Obesity, Physical Activity, Diet (15 obras) · Biology (13 obras) · Internal Medicine (13 obras) · Physical therapy (13 obras) · Anthropometry (11 obras) · Children's Physical and Motor Development (11 obras)