scholarly journals Relationship between bone age, hormonal markers and physical capacity in adolescents

2017 ◽  
Vol 27 (1) ◽  
pp. 77 ◽  
Author(s):  
Vanessa Carla Monteiro Pinto ◽  
Petrus Gantois Massa Dias dos Santos ◽  
Matheus Peixoto Dantas ◽  
João Paulo De Freitas Araújo ◽  
Suzet De Araújo Tinoco Cabral ◽  
...  
Keyword(s):  
Body Weight ◽  
Upper Limb ◽  
Body Height ◽  
Bone Age ◽  
Skeletal Age ◽  
Lower Limbs ◽  
Chronological Age ◽  
Testosterone Levels ◽  
Explosive Strength ◽  
And Performance

Introduction: Physical capabilities are an important parameter of the functional development of adolescents, not only by chronological age but also by their maturational state, as individuals with the same chronological age can have different performance to their less mature counterparts. Objective: To compare and relate the physical capabilities and hormonal markers according to sex and maturity of adolescents. Method: The sample consisted of adolescents of both sexes, aged 10 to 14 years. We evaluated the maturity achieved by a predictive equation of skeletal age, physical capabilities (explosive power of upper and lower limbs, velocity of upper limbs and agility) and hormonal markers (testosterone and oestradiol) via chemiluminescence. Results: Females showed more advanced maturational status, higher weight, body height and oestradiol levels; males performed better in the explosive force of upper and lower limbs, upper limb speed, agility and testosterone levels. In the normal maturational state males showed greater skeletal age, body weight, body height, explosive strength of upper and lower limbs, and testosterone levels; the females in the normal maturational state had higher skeletal age, body weight, body height, explosive upper limb strength and oestradiol levels. In the male correlation analysis, bone age was related to the explosive strength of upper and lower limbs and testosterone; while bone age in females was related to explosive upper limb strength and oestradiol. Conclusion: It is concluded that maturation, testosterone and oestradiol levels play an important role in the physical aspects and performance of motor skills of adolescents, especially in upper limb force which was more related to the maturation obtained by skeletal age of males and females.

ANTHROPOMETRIC CHARACTERISTICS AND ANAEROBIC POWER OF LOWER LIMBS AND THEIR RELATIONSHIPS WITH RACE TIME IN FEMALE SPEED CLIMBERS

2018 ◽  
Vol 4 ◽  
pp. 118-126
Author(s):  
Marcin Krawczyk ◽  
Mariusz Ozimek ◽  
Robert Rokowski ◽  
Mariusz Pociecha ◽  
Pawel Draga
Keyword(s):  
Body Weight ◽  
Lean Body Mass ◽  
Body Mass ◽  
Muscle Power ◽  
Body Height ◽  
Lower Limbs ◽  
Race Time ◽  
National Team ◽  
Explosive Strength ◽  
High Level

Previous research indicates that high results in speed climbing are determined by a high level of explosive strength and muscle power in the lower limbs. However, a literature review shows that no studies have analysed women practicing this climbing discipline. Therefore, the main goal of the study was to assess the level of development of physique and the level of explosive strength and muscle power of the lower limbs of female speed climbers at a representative level. Furthermore, an attempt was made to analyse the relationships between the variables studied and race time in female speed climbers.The study included 5 female players (speed climbers) who were members of the national team in 2016. The measurements were made during the Polish National Team Camp.  The analysis was based on the results of the fastest races expressed in seconds. The measurements and indices computed in the study included body height, body weight, lean body mass, BMI and ponderal index. The assessment of the power of the lower limbs was carried out using two jump tests: CMJ with arm swing and CMJ. Power was expressed relative to body weight and to lean body mass.The highest relationships with race time were recorded for body height (r = 0.94, p <0.05), body weight (r = 0.96, p <0.01) and lean body mass (LBM) ( r = 0.98, p <0.01). Strong but statistically insignificant relationships were recorded between race time and power indicators of the lower limbs (correlations above r = -0.66).In female speed climbing, race time can be determined by the level of physique. Smaller body size can allow female climbers to perform faster and achieve better times in speed climbing. It can be suggested that in female speed climbing, a high level of maximum alactic anaerobic capacity of the lower limbs is an important factor that affects race time. The results of our own research suggest that in female speed climbing, specific body characteristics may to a greater extent determine the race time compared to anaerobic maximum power of the lower limbs.

scholarly journals Maturational stages: comparison of growth and physical capacity indicators in adolescents

2018 ◽  
Vol 28 (1) ◽  
pp. 42 ◽  
Author(s):  
Vanessa Carla Monteiro Pinto ◽  
Petrus Gantois Massa Dias dos Santos ◽  
Rafaela Catherine Da Silva Cunha de Medeiros ◽  
Francisco Emílio Simplício Souza ◽  
Thaisys Blanc dos Santos Simões ◽  
...  
Keyword(s):  
Upper Limb ◽  
Motor Performance ◽  
Evaluation Method ◽  
Physical Capacity ◽  
Lower Limbs ◽  
Stage Iii ◽  
Childhood And Adolescence ◽  
Upper Limbs ◽  
Explosive Strength ◽  
Maturational Stage

Introduction: The identification of physical capacity is an important marker related to healthy behavior during childhood and adolescence, in which some factors appear to contribute to motor performance such as maturation and hormonal levels. Objective: To compare growth indicators, physical capacity and hormonal markers according to gender and maturational stage in adolescents. Methods: Eighty-nine adolescents of both genders aged 10-13 years participated in the study. Sexual maturation was evaluated using the Tanner’s self-evaluation method. Physical capacity (explosive strength of upper and lower limbs, upper limb velocity and agility) and hormonal markers (testosterone and estradiol) were evaluated through the chemiluminescence method. Results: In the comparison by gender, girls had higher weight (p = 0.023), height (p = 0.018) and fat percentage values (p = 0.001), while boys presented better motor performance for the explosive strength of upper limbs (p = 0.005) and lower limbs (p = 0.011), agility (0.018) and upper limb velocity (p = 0.014). Regarding maturational stage, boys did not present differences in any variable analyzed; (Stage V versus I), height (stage III, IV and V versus I) and upper limb explosive strength (stage III and IV versus I). Conclusion: Growth, weight and height, as well as explosive strength of upper limbs were higher in girls at more advanced maturational stages and appear to be gender dependent.

scholarly journals Skeletal age and explosive strength in young volleyball players

2017 ◽  
Vol 19 (3) ◽  
pp. 331 ◽  
Author(s):  
Petrus Gantois ◽  
Vanessa C. M. Pinto ◽  
Kezianne R. de Castro ◽  
Paulo V. João ◽  
Paulo M. S. Dantas ◽  
...  
Keyword(s):  
Test Performance ◽  
Vertical Jump ◽  
Skeletal Age ◽  
Lower Limbs ◽  
Explosive Strength ◽  
Jump Test ◽  
Biological Development ◽  
Explained Variance ◽  
Post Hoc ◽  
Medicine Ball

Identifying diferent anthropometric, physiological and motor aspects is essential to obtain success in sports practice. However, these components may be developed in same age subjects diferently, in part due biological development. he aim of the study was compare and correlate the explosive strength to biological maturation by sex, obtained by estimation of skeletal age based on anthropometric variables. he sample consisted of 239 subjects of both sexes, aged 10 to 13 years. Maturation was assessed by skeletal age predictive equation and upper and lower limbs explosive strength using medicine ball throw test and vertical jump, respectively. Skeletal age was assessed by skeletal age using a predictive anthropometrical based equation. Upper and lower limbs explosive strength were evaluated by medicine ball throwing test and vertical jump test, respectively. Post hoc analysis showed delayed biological development subjects had worst medicine ball throwing test performance than accelerated boys (p=0.001; d=0.96) and girls (p< 0.01; d= 2.01); regarding to vertical jump test, worst performance was also detected to maturational delayed boys when compared to accelerated ones (p=0.24; d=1.1) and girls (p=0.007; d=0.75). Regression analysis showed skeletal age explained variance of 36% and 19.2% for boys and 45.2% and 16.1% for girls upper and lower limbs explosive strength. Skeletal age is positively related to upper and lower limbs explosive strength and show higher performance for accelerated biological development young players when compared to delayed ones, independently from sex. 

scholarly journals Vybrané kondiční testy a jejich vztah k výkonu ve sportovním lezení

2011 ◽  
Vol 5 (1) ◽  
pp. 105-116 ◽  
Author(s):  
Ladislav Vomáčko ◽  
Jiří Baláš ◽  
Matouš Jindra
Keyword(s):  
Body Weight ◽  
Linear Regression ◽  
Linear Regression Analysis ◽  
Body Height ◽  
Sport Climbing ◽  
Standing Long Jump ◽  
Dependent Variables ◽  
Long Jump ◽  
And Performance ◽  
The Relationship

Sport climbing is now seen as part of the climbing population fi tness interesting resource. Th is study clarifi es the relationship between selected conditioning tests, anamnetic data and performance in sport climbing in the climbing trips OS or RP and each points to a relationship between these ways of ascent climbing routes. Study describes the relation between the diff erent standardized tests selected from Eurofi t test set (standing long jump, full forward trunk bend, pull-up hold, manual dynamometry, „fl amingo“ exercise), anthropometric data (body height, body weight, body fat ratio in %) and anamnestic data (length of climbing experience, climbing performance in terms Red Point RP, and On sight OS). Th e dependency measure is expressed by a linear regression with two dependent variables. Th e dependent variables express climbing performance in terms of RP and OS. Th e signifi cant indicators for dependent variable RP in this given regressive model are length of climbing experience, pull-up hold, manual dynamometry and body weight; for the dependent variable OS, these are length of climbing experience, pull-up hold and manual dynamometry. Aft er the application of a linear regression analysis with two dependent variables, the dependency measure between the RP and OS performance was formulated as a partial correlation rp = 0,745.

scholarly journals Smečované podání u volejbalistů kategorie kadetů

2011 ◽  
Vol 5 (2) ◽  
pp. 21-28
Author(s):  
František Zahálka ◽  
Tomáš Malý ◽  
Miroslav Čada ◽  
Lucia Malá
Keyword(s):  
Body Weight ◽  
Body Height ◽  
Lower Extremities ◽  
Jump Height ◽  
Explosive Strength ◽  
Model Situation ◽  
Jump Test ◽  
Ball Velocity ◽  
Run Up ◽  
The Relationship

The aim of the study was to determine the relationship between jump serve velocity achieved in contact with the ball and a model height of the jump as an indicator of explosive strength of lower extremities and to correlate these values. The monitored group consisted of 169 players (n = 172, age 15.95 ± 0.75 year, body height 185.44 ± 6.9 cm, body weight 71.92 ± 7.92 kg). Before the measurement, the players undertook a jump test, when, in a model situation, they attempted to achieve maximum jump height after a run-up. The highest serve velocity value was 105.9 km.h-1, while the lowest value was 56.3 km.h-1 (difference by 46.8 %). The measured maximum values were transformed into percentile norms (50th percentile P50 = 79.9 km.h1 ). Percentile distribution for jump serve velocity and the jump enables us, with respect to a relatively high number of tested players, to consider the stated values as normative and to compare other players, as well. It appears that the correlation of jump height is a good indicator of the dispositions for jump serve implementation in terms of the ball velocity.

scholarly journals Correlation between results of explosive strength and speed tests in young football players

2020 ◽  
Vol 10 (2) ◽  
pp. 29-38
Author(s):  
Petar Bubnjević ◽  
Veljko Vukićević ◽  
Nikola Lukić ◽  
Velimir Miličković
Keyword(s):  
Middle School ◽  
Body Weight ◽  
Body Height ◽  
Morphological Characteristics ◽  
Preschool Age ◽  
School Age ◽  
Explosive Strength ◽  
Motor Test ◽  
Long Jump ◽  
Motor Tests

The subject of this research are the motor skills of children of preschool, younger school and middle school age who train football. The aim of the study was to establish the level of correlation of the observed tests in different age categories, as well as the influence of morphological characteristics on motor test results in subjects of different age. To assess morphological characteristics: body height and body weight, and three variables - foot tapping for 15 seconds, standing long jump and 30m sprint tests were used. The study involved transversal research conducted on a sample of 40 boys of preschool, younger school and middle school age (6-13 years old), who actively played football in the "Jedinstvo" school of football from Gospodjinci. The training experience of the respondents ranges from 6 months to 5 years. The obtained results indicate that there is no statistically significant correlation between explosive strength and speed tests in preschool age, while in younger school age the statistical correlation is significant, and in middle school age the correlation is the greatest. The obtained results confirmed that the level of connection between motor tests changes depending on the age of the examinees. Body height and body weight were found to have a statistically significant effect on the results of the long jump and 30m sprint tests only in middle school age. This type of statistically significant influence of body height and body weight on the results of motor tests was not observed in preschool and younger school age.

COMPARISION OF DENTAL SCORING SYSTEM WITH RADIOGRAPHIC SKELETAL SYSTEM IN AGE ESTIMATION

JKCD ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 9-11
Author(s):  
Sadaf Ambreen
Keyword(s):  
Age Estimation ◽  
Scoring System ◽  
Skeletal Age ◽  
Chronological Age ◽  
Age Group ◽  
Dental Age ◽  
Scoring Method ◽  
Cross Sectional ◽  
Study Results ◽  
Male Subjects

Objectives: To compare Demirjian Dental scoring method with Greulich-Pyle (GP) Skeletal method of age estimation in pubertal children. Materials and Methods: Sample of the study included 267 male healthy subjects of 11-16 years of age group.. Demirjian Scoring system was utilized to evaluate the orthopantomograms to assess their Dental age and the Hand-Wrist radiographs were analyzed to calculate the skeletal age by utilizing GP atlas. Chronological age was obtained from the date of birth of the subject .Both methods were compared with one another and with the chronological age. It was a cross-sectional study and only healthy male subjects without any clinical abnormalities were included in the study. Results: A total of 267 male subjects of 11-16 years of age group were assessed by Demirjian and Greulich Pyle Methods. Both were compared with Chronological Age. Data obtained was statistically analyzed and the Student “t” test was applied in the study population. The mean difference between Chronolgical age and dental age was 0.69years and that of chronological age and skeletal age was 0.87 years. It was observed from dental age assessment that it does not differ much from the skeletal age. Conclusion: It was concluded that Demirjian method of Age Estimation is more precise than Greulich Pyle method of Age Estimation. Furthermore both methods can be used selectively in Medicolegal cases to access bone age which can be easily correlated to chronological age.

INFLUENCE OF METYRAPONE ON PLASMA CONCENTRATIONS OF TESTOSTERONE AND ANDROSTENEDIONE IN MAN

1971 ◽  
Vol 68 (3) ◽  
pp. 576-584 ◽  
Author(s):  
K. O. Nilsson ◽  
B. Hökfelt
Keyword(s):  
Body Weight ◽  
Male Patient ◽  
Gradual Increase ◽  
Plasma Concentrations ◽  
Plasma Testosterone ◽  
Testosterone Levels ◽  
Basal Plasma ◽  
Normal Males ◽  
A Minor ◽  
Secondary Hypogonadism

ABSTRACT Metyrapone was administered either orally, 750 mg every four h, in a total of six doses, or intravenously 30 mg per kg body weight as a four h infusion. In three males with normal endocrine functions, metyrapone given orally or intravenously induced a fall in plasma testosterone and an elevation of androstenedione within 2–8 h. When metyrapone was administered to a patient given dexamethasone to suppress endogenous ACTH production, the androstenedione levels did not alter whereas the testosterone levels showed a slight, transient decrease. In two normal females metyrapone administration was followed by a marked increase in plasma androstenedione whereas testosterone showed only a minor, gradual increase. In one male patient with Addison's disease the basal plasma testosterone was normal whereas the level of androstenedione was low. Following metyrapone intravenously, there was a slight suppression of plasma testosterone but no change in the androstenedione concentration. In one patient with primary hypogonadism, two with secondary hypogonadism and two with Klinefelter's syndrome the plasma testosterone was low under basal conditions and did not change following metyrapone. Basal plasma androstenedione was within the range for normal males and increased markedly following metyrapone in all the cases.

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