scholarly journals THE MOTOR ABILITIES OF HANDBALL PLAYERS OF DIFFERENT BIOLOGICAL MATURATION

2019 ◽  
pp. 125
Author(s):  
Mladen Živković ◽  
Nenad Stojiljković ◽  
Vladimir Antić ◽  
Ljubomir Pavlović ◽  
Nemanja Stanković ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Univariate Analysis ◽  
Peak Height ◽  
Height Velocity ◽  
Training Design ◽  
Peak Height Velocity ◽  
Motor Abilities ◽  
Explosive Power ◽  
Biological Maturation ◽  
Significant Difference

The aim of this research was to determine the differences between the results from the tests of motor abilities carried out on a selected group of handball players in relation to their biological maturation. A total of 23 handball players, belonging to a selected group, took part in this research. The overall sample of participants was divided into three groups based on their biological maturation. The measurements of motor abilities were carried out using the following tests: explosive power, sprint speed and rapid changes in direction. The statistical analysis included descriptive statistics, a univariate analysis of variance and the Bonferroni PostHoc test in order to determine whether a statistically significant difference could be detected between the groups on the tests of motor abilities. Based on the statistical analysis (ANOVA method), a difference was determined between the peak height velocity (PHV) groups for all the variables. The PostHoc test later determined that there were no differences for any of the variables between the PrePHV and MidPHV groups. Differences in all the variables were determined between the PrePHV and PostPHV groups. Differences between the MidPHV and PostPHV groups were determined for 7 variables, while no statistically significant difference was determined for 3 of the variables (5JT, T-test and the Slalom). The main contribution of this research is that it indicates to coaches the inevitability of being familiar with the biological maturation of their players for optimal selection, for adequate training design, and a decrease in the risk of injury. 

scholarly journals Biological maturity and the anthropometric, physical and technical assessment of talent identified U16 Australian footballers

2017 ◽  
Vol 12 (3) ◽  
pp. 344-350 ◽  
Author(s):  
Ashley J Cripps ◽  
Christopher Joyce ◽  
Carl T Woods ◽  
Luke S Hopper
Keyword(s):  
Characteristic Curve ◽  
Vertical Jump ◽  
Binary Logistic Regression ◽  
Peak Height ◽  
Technical Skill ◽  
Height Velocity ◽  
State Representation ◽  
Peak Height Velocity ◽  
Biological Maturation ◽  
Australian Football

This study compared biological maturation, anthropometric, physical and technical skill measures between talent and non-talent identified junior Australian footballers. Players were recruited from the under 16 Western Australian Football League and classified as talent (state representation; n = 25, 15.7 ± 0.3 y) or non-talent identified (non-state representation; n = 25, 15.6 ± 0.4 y). Players completed a battery of anthropometric, physical and technical skill assessments. Maturity was estimated using years from peak height velocity calculations. Binary logistic regression was used to identify the variables demonstrating the strongest association with the main effect of ‘status’. A receiver operating characteristic curve was used to assess the level of discrimination provided by the strongest model. Talent identified under 16 players were biologically older, had greater stationary and dynamic leaps and superior handball skill when compared to their non-talent identified counterparts. The strongest model of status included standing height, non-dominant dynamic vertical jump and handball outcomes (AUC = 83.4%, CI = 72.1%–95.1%). Biological maturation influences anthropometric and physical capacities that are advantageous for performance in Australian football; talent identification methods should factor biological maturation as a confound in the search for junior players who are most likely to succeed in senior competition.

scholarly journals Ossification of the phalanges of the foot and its relationship to peak height velocity and the calcaneal system

2018 ◽  
Vol 12 (1) ◽  
pp. 84-90 ◽  
Author(s):  
M. R. Garcia ◽  
A. D. Nicholson ◽  
A. M. Nduaguba ◽  
J. O. Sanders ◽  
R. W. Liu ◽  
...  
Keyword(s):  
Skeletal Maturity ◽  
Strong Association ◽  
Intraclass Correlation ◽  
Bone Age ◽  
Peak Height ◽  
Height Velocity ◽  
Peak Height Velocity ◽  
Guided Growth ◽  
Significant Difference ◽  
Stage System

Purpose There are multiple skeletal maturity grading systems, but none of them utilizes the phalanges of the foot. To minimize radiation, it would be ideal if one could assess the skeletal maturity of a foot based on bones seen on routine foot radiographs, if guided growth is being considered as a treatment option. We developed a system that correlates changes of the appearance of the foot phalanges to peak height velocity (PHV) and the recently described calcaneal apophyseal ossification grading system. Methods We selected 94 children from the Bolton-Brush study, each with consecutive radiographs from age ten to 15 years old. Using the anteroposterior view, we analyzed the ossification patterns of the phalanges and developed a six-stage system. We then determined the PHV for each subject and defined its relationship with our system. Our system was then compared with the previously established calcaneal system. Results We calculated an Intraclass correlation coefficient (ICC) range of 0.957 to 0.985 with a mean of 0.975 and interclass reliability coefficient of 0.993 indicating that this method is reliable and consistent. Our system showed no significant difference between gender with respect to PHV, which makes it a reliable surrogate for determining bone age in paediatric and adolescent patients. Conclusions Our system has a strong association with the calcaneal system. It is a simple six-stage system that is reliable and correlated more strongly with PHV than chronological age. The system requires knowledge of the ossification markers used for each stage but is easily used in a clinical setting.

Effect of Biological Maturation on Performance of the Athletic Ability Assessment in Australian Rules Football Players

2021 ◽  
Vol 16 (1) ◽  
pp. 28-36
Author(s):  
Daniel K. Rogers ◽  
Ian McKeown ◽  
Gaynor Parfitt ◽  
Darren Burgess ◽  
Roger G. Eston
Keyword(s):  
Statistical Significance ◽  
A Priori ◽  
Developmentally Appropriate ◽  
Peak Height ◽  
Height Velocity ◽  
Football Players ◽  
Peak Height Velocity ◽  
Athletic Ability ◽  
Biological Maturation ◽  
Australian Rules Football

Purpose: To determine the effect of biological maturation on athletic movement competency as measured using the Athletic Ability Assessment-6. Methods: Fifty-two junior Australian Rules football players were split into 3 groups based on proximity to peak height velocity, while 46 senior players were split into 2 groups based on playing status. The subjects completed the Athletic Ability Assessment-6 (inclusive of the overhead squat, double lunge, single-leg Romanian dead lift, push-up, and chin-up). All subjects were filmed and retrospectively assessed by a single rater. A 1-way analysis of variance and effect-size statistics (Cohen d) with corresponding 90% confidence intervals were used to describe between-groups differences in the component movement scores. The statistical significance was set a priori at P < .05. Results: There were significant between-groups differences for all component movements (P < .05). Post hoc testing revealed that older, more mature subjects possessed greater competency in all movements except the overhead squat. The effect sizes revealed predominantly moderate to very large differences in competency between the senior and junior groups (range of d [90% confidence interval]: 0.70 [0.06 to 1.30] to 3.01 [2.18 to 3.72]), with unclear to moderate differences found when comparing the 3 junior groups (0.08 [−0.50 to 0.65] to 0.97 [0.22–1.61]). Conclusions: The findings suggest that biological maturation may be associated with changes in athletic movement competency in youth Australian Rules football players. Therefore, it is recommended that strength and conditioning coaches monitor maturity status when working with 12- to 15-y-old players. This can allow for a comparison of an individual’s athletic movement competency to maturity-based standards and help guide developmentally appropriate training programs.

scholarly journals Effect of biological maturation on gross motor coordination in boys: a mediation analysis

2020 ◽  
Vol 33 ◽  
Author(s):  
Douglas Henrique Bezerra-Santos ◽  
Leonardo Gomes de Oliveira Luz ◽  
Braulio Patrick da Silva-Lima ◽  
Ingrid Kelly Alves dos Santos-Pinheiro ◽  
Arnaldo Tenório da Cunha-Júnior ◽  
...  
Keyword(s):  
Physical Activity ◽  
Motor Coordination ◽  
Peak Height ◽  
Early Years ◽  
Height Velocity ◽  
Peak Height Velocity ◽  
Gross Motor ◽  
Sitting Height ◽  
Biological Maturation ◽  
Walking Backward

Abstract Introduction: The literature emphasizes the importance of acquiring good motor coordination in the early years of life and its relationship with physical fitness and physical activity during adolescence and adulthood. Objective: To analyze the effect of biological maturation on the motor coordination in boys. Method: The sample was composed by 203 boys between 11 and 14 years old. Height, body mass, sitting height, waist circumference (WC) and skinfolds were measured. Somatic maturation (SM) was assessed by maturity offset (estimated age at peak height velocity). The gross motor coordination was evaluated by Körperkoordinationstest für Kinder (KTK) battery. Results: The SM exerted an effect on the walking backward on balance beams (WB) mediated by the WC. Conclusion: The results showed that the performance of boys in the WB was negatively influenced by the greater volume of fat in the trunk related to a more advanced state of SM.

scholarly journals Self-perceived social relationships are related to health risk behaviors and mental health in adolescents

2021 ◽  
Vol 26 (suppl 3) ◽  
pp. 5273-5280
Author(s):  
Danilo Rodrigues Pereira da Silva ◽  
André de Oliveira Werneck ◽  
Ricardo Ribeiro Agostinete ◽  
Afrânio de Andrade Bastos ◽  
Rômulo Araújo Fernandes ◽  
...  
Keyword(s):  
Mental Health ◽  
Public Schools ◽  
Social Relationships ◽  
Tobacco Smoking ◽  
Health Risk Behaviors ◽  
Peak Height ◽  
Height Velocity ◽  
Peak Height Velocity ◽  
Cross Sectional ◽  
Biological Maturation

Abstract Although changes have been observed in social relationships in the recent years, especially among younger generations, little evidence is available concerning factors associated with adolescents’ perceived social relationships. In this study we investigated the association between self-perceived social relationships, health-related behaviors, biological maturation, and mental health in adolescents. This is a cross-sectional study conducted with 1,336 adolescents (605 boys and 731 girls) aged between 10 to 17 years from public schools. Self-perceived social relationships (family, friends, and teachers), feelings of stress and sadness, academic performance, tobacco smoking, alcohol and fat consumption, physical activity, and screen time were evaluated by a questionnaire. Biological maturation was assessed by the peak height velocity. We observed that worse perceived social relationships were associated with tobacco smoking (family and teachers), alcohol drinking (teachers), higher consumption of fat (teachers), greater feelings of stress (family and teachers) and sadness (family and friends), and poor academic achievement (friends and teachers).

scholarly journals Birth weight, biological maturation and obesity in adolescents: a mediation analysis

2017 ◽  
Vol 8 (4) ◽  
pp. 502-507 ◽  
Author(s):  
A. O. Werneck ◽  
D. R. P. Silva ◽  
P. J. Collings ◽  
R. A. Fernandes ◽  
E. R. V. Ronque ◽  
...  
Keyword(s):  
Birth Weight ◽  
Waist Circumference ◽  
Body Fat ◽  
Economic Status ◽  
Peak Height ◽  
Height Velocity ◽  
Peak Height Velocity ◽  
Mediation Analyses ◽  
School Based ◽  
Biological Maturation

This study was aimed to investigate associations between birth weight and multiple adiposity indicators in youth, and to examine potential mediating effects by biological maturation. This was a school-based study involving 981 Brazilian adolescents aged between 10 and 17 years. Birth weight was reported retrospectively by mothers. Maturation was estimated by age of peak height velocity. Adiposity indicators included body mass index (BMI), waist circumference and percent body fat estimated from triceps and subscapular skinfolds. Multilevel mediation analyses were performed using the Sobel test, adjusted for chronological age, gestational age, cardiorespiratory fitness and socio-economic status. Except for body fat in girls, biological maturation partly or fully mediated (P<0.05) positive relationships between birth weight with all other obesity indicators in both sexes with their respective values of indirect effects with 95% confidence intervals: BMI [boys: 0.44 (0.06–0.82); girls: 0.38 (0.13–0.64)], waist circumference [boys: 1.14 (0.22–2.05); girls: 0.87 (0.26–1.48)] and body fat [boys: 0.60 (0.13–1.07)]. To conclude, birth weight is associated with elevated obesity risk in adolescence and biological maturation seems to at least partly mediate this relationship.

scholarly journals Age-related differences in linear sprint in adolescent female soccer players

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Elena Mainer-Pardos ◽  
Oliver Gonzalo-Skok ◽  
Hadi Nobari ◽  
Demetrio Lozano ◽  
Jorge Pérez-Gómez
Keyword(s):  
Body Mass ◽  
Peak Height ◽  
Sprint Performance ◽  
Soccer Players ◽  
Height Velocity ◽  
Adolescent Female ◽  
Peak Height Velocity ◽  
Running Speed ◽  
Biological Maturation ◽  
Age Related

Abstract Background Several studies have observed the contribution of chronological age, biological maturation, and anthropometric characteristics to sprinting performance in young soccer players. Nevertheless, there are no studies that have analysed the contribution of these characteristics to running speed qualities in adolescent female soccer players. Objective This study investigated age-related differences in sprint performance in adolescent female soccer players. Also, it examined the possible influence of anthropometry [body mass and body mass index (BMI)] and biological maturation [age at peak height velocity (APHV)] in sprint performance. Methods Eighty adolescent female soccer players [under (U) 14, n = 20; U16, n = 37; U18, n = 23] participated in this study. Players were tested for 40 m sprint (each 10 m split times). Results Posthoc analysis revealed better performance in all split sprint times of older soccer players (U18 and U16) compared with younger category (F: 3.380 to 6.169; p < 0.05; ES: 0.64 to 1.33). On the contrary in all split sprint times, there were no significant changes between U16 and U18 (p < 0.05; ES: 0.03 to 0.17). ANCOVA revealed differences in all parameters between groups, controlled for APHV (p < 0.05). In contrast, all between-group differences disappeared after body mass and BMI adjustment (p > 0.05). Finally, the results indicate that BMI and body mass were significantly correlated with 40 m sprint (p < 0.05; r: -0.31) and 20 m flying (p < 0.01; r: 0.38), respectively. Conclusion In the present players’ sample, body mass and BMI had a significant impact on running speed qualities.

scholarly journals Biological maturation of Portuguese rhythmic gymnasts in different competition levels of performance

2019 ◽  
Vol 8 (1) ◽  
pp. 38-48
Author(s):  
Amanda Batista ◽  
Rui Garganta ◽  
Lurdes Ávila-Carvalho
Keyword(s):  
Pearson Correlation ◽  
Pubertal Development ◽  
Peak Height ◽  
Height Velocity ◽  
Chronological Age ◽  
Training Volume ◽  
Competitive Performance ◽  
Peak Height Velocity ◽  
Biological Maturation ◽  
Competition Level

The aims of the present study were: (1) identify and compare the biological maturity in Portuguese gymnasts across competitive levels; (2) investigate how morphological variables and training volume behave in the different status and indicators of maturity and (3) determinate if the maturity status influences the competitive performance. The sample (n=164) consisted of three competition levels (Base, 1st division and Elite) from Portugal. Anthropometric measurements and body composition were performed. For analysis of biological maturation, the sexual and somatic maturation were evaluated. For the statistical analysis, Mann-Whitney and Kruskal-Wallis tests, Pearson correlation and Linear Regression were used. In total, 63.4% of gymnasts had not yet reached menarche and the higher competition level, lower the number of gymnasts with menarche. On mean, all groups had reached the age at peak height velocity. The higher the competition level, higher the chronological age and age at peak height velocity. Thus, the maturation indicators showed a delay in pubertal development in all competition levels and the elite gymnasts seem present a later pubertal development. The chronological age, the values of body mass, height, BMI and body fat increased with the maturity status according all maturity indicators. However, gymnasts with different maturity status revealed similar training volume. Finally, the maturational status explained 11.5% of competition success with higher advantage in the competitive performance to prepubertal gymnasts. Thus, the premenarcheal status and a higher age at peak height velocity contribute to performance in Rhythmic Gymnastics.

scholarly journals Secular trend of the skeletal maturation in relation to peak height velocity–a comparison between two groups of children born 1969-1973 and 1996-2000

2020 ◽  
Vol 42 (6) ◽  
pp. 612-618
Author(s):  
Louise Miltenburg Caspersen ◽  
Liselotte Sonnesen
Keyword(s):  
Secular Trend ◽  
Peak Height ◽  
Individual Growth ◽  
Skeletal Maturation ◽  
Height Velocity ◽  
Growth Spurt ◽  
Early Event ◽  
Peak Height Velocity ◽  
Significant Difference ◽  
Maturation Stages

Summary Background/Objectives The aims were to study the presence of a secular trend in (a) age at peak height velocity (PHV), (b) velocity at PHV, and (c) duration of skeletal maturation in relation to PHV. Material/Method Two groups of children: 100 children (63 boys, 37 girls) born between 1969–1973 and 71 children (49 boys, 22 girls) born between 1996 and 2000, were compared. Age and velocity at PHV were measured on individual growth velocity curves. Skeletal maturation stages were assessed on hand-wrist radiographs, and duration from the skeletal maturation stages to PHV was determined. Results Age at PHV occurred significantly earlier (0.47 years, CI 95% 0.19–0.76, P &lt; 0.001), and velocity at PHV was significantly higher (0.68 cm/year, CI 95% 1.47–2.06, P &lt; 0.003) in children born 1996–2000 compared to 1969–1973. No significant difference in duration of skeletal maturation was seen between the groups. Skeletal maturation stages occurred significantly in the following order before PHV for both genders: PP2= 2.18 years (P = 0.002), MP3= 1.60 year (P = 0.008), S 1.07 year (P = 0.003), and MP3cap 0.38 year (P = 0.037). Limitations Most radiographs were taken before PHV, the duration thus mainly reflects the early event of pubertal growth spurt. Conclusion A secular trend was evident: significantly decreased age at PHV and significantly increased velocity at PHV. No evidence of a secular trend regarding duration of the skeletal maturation in relation to PHV was found. Due to the declining age at PHV, the skeletal maturation stages occurred earlier in relation to chronological age.

scholarly journals Reference norms for evaluating maximum expiratory flow of children and adolescents of the Maule Region in Chile

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e5157
Author(s):  
Marco Antonio Cossio-Bolaños ◽  
Cynthia Andruske ◽  
Miguel Arruda ◽  
Jose Sulla-Torres ◽  
Jaime Pacheco-Carrillo ◽  
...  
Keyword(s):  
Children And Adolescents ◽  
Peak Height ◽  
Biological Age ◽  
Height Velocity ◽  
Chronological Age ◽  
International Studies ◽  
Peak Height Velocity ◽  
Biological Maturation ◽  
Maximum Expiratory Flow ◽  
Expiratory Flow

Background The norms for evaluating the maximum expiratory flow (MEF) usually are developed according to chronological age and height. However, to date, little research has been conducted using reference values that take into account the temporal changes of biological maturation. The objectives of this study were to (a) compare the MEF with those of other international studies, (b) align the MEF values with chronological and biological age, and (c) propose reference standards for children and adolescents. Methods The sample studied consisted of 3,566 students of both sexes (1,933 males and 1,633 females) ranging in age from 5.0 to 17.9 years old. Weight, standing height, and sitting height were measured. Body mass index was calculated. Biological maturation was predicted by using age of peak height velocity growth (APHV). MEF (L/min) was obtained by using a forced expiratory manoeuvre. Percentiles were calculated using the LMS method. Results and Discussion Predicted APHV was at age 14.77 ± 0.78 years for males and for females at age 12.74 ± 1.0 years. Biological age was more useful than chronological age for assessing MEF in both sexes. Based on these findings, regional percentiles were created to diagnose and monitor the risk of asthma and the general expiratory status of paediatric populations.

Sign in / Sign up

Export Citation Format

Share Document