A Longitudinal Study of Physical Fitness in Elite Junior Tennis Players

2016 ◽  
Vol 28 (4) ◽  
pp. 553-564 ◽  
Author(s):  
Tamara Kramer ◽  
Barbara C.H. Huijgen ◽  
Marije T. Elferink-Gemser ◽  
Chris Visscher
Keyword(s):  
Longitudinal Study ◽  
Physical Fitness ◽  
Multilevel Analysis ◽  
Talent Development ◽  
Performance Level ◽  
Lower Body ◽  
Tennis Players ◽  
Junior Tennis ◽  
And Performance ◽  
Lower Body Power

Purpose:To analyze how physical fitness (PF) improves in elite junior tennis players related to age, maturity, and performance level.Methods:Elite junior tennis players (n = 113 boys, n = 83 girls) divided by performance level were monitored longitudinally from U14 to U16. Maturity, upper and lower-body power, speed, and agility were measured during subsequent competitive seasons. Improvement was analyzed per sex using multilevel analysis.Results:PF components for boys and girls improved over age (U14-U16) (ES .53–.97). In boys, the more mature boys outscored the less mature boys in upper and lower-body power from U14-U16. In girls, high-ranked girls outscored lower-ranked girls on lower-body power, speed, and agility (U14-U16) (p < .05).Conclusion:Boys and girls improved on all PF components during U14-U16. In boys, power was related to maturity. In girls, lower-body power, speed, and agility were related to tennis performance. This has important implications for talent development.

Growth, Maturation and Exercise During Youth—2016

2017 ◽  
Vol 29 (1) ◽  
pp. 3-7 ◽  
Author(s):  
Jaak Jürimäe
Keyword(s):  
Physical Activity ◽  
Physical Fitness ◽  
Short Term ◽  
Tennis Players ◽  
Positive Effects ◽  
Junior Tennis ◽  
And Performance ◽  
Time Varying Covariates ◽  
Methodological Paper ◽  
Selection Of

For The Year that Was—2016, I have selected three papers in the area of growth, maturation, and exercise during youth. The year of 2016 was a successful year and it was not an easy task to highlight the most significant publications in this specific area of pediatric exercise science. The first paper has been chosen because it provides, for the first time, the growth and maturational status of elite junior tennis players belonging to the top eight players in the National rankings in various ages and compares against population norms. It appeared that individual differences in growth and maturation contribute towards the selection of elite junior tennis players in both sexes, with a bias towards these athletes who are comparatively tall and heavy for their age already in younger ages. The second paper is a methodological paper and was selected because it provides a unique perspective on the use of different tracking coefficients to investigate short-term tracking of cardiorespiratory and performance-related physical fitness among adolescents during growth and maturation. Specifically, three distinct statistical approaches were applied in this paper: auto-correlations, mulitilevel modeling corrected tracking values for time-varying covariates and Cohen`s Kappa in order to identify group and individual tracking as well as individuals whose trajectories are unstable across time. This methodological paper demonstrated the importance of the selection of the statistical approach to monitor and describe short-term tracking of cardiorespiratory and performance-related physical fitness variables in adolescents during growth and maturation. The third selected paper provided some evidence that the consequence of physical activity during childhood can be far reaching as physical activity might not only promote health benefits but also have positive effects on adulthood earnings.

scholarly journals RELATIONSHIP BETWEEN ISOKINETIC STRENGTH AND FIELD TESTS OF PHYSICAL FITNESS IN ELITE JUNIOR TENNIS PLAYERS 758

1996 ◽  
Vol 28 (Supplement) ◽  
pp. 127
Author(s):  
E. P. Roetert ◽  
T. J. McCormick ◽  
S. W. Brown ◽  
T. S. Ellenbecker
Keyword(s):  
Physical Fitness ◽  
Field Tests ◽  
Isokinetic Strength ◽  
Tennis Players ◽  
Junior Tennis

scholarly journals Kinematic characteristics of the tennis serve from the ad and deuce court service positions in elite junior players

PLoS ONE ◽  
2021 ◽  
Vol 16 (7) ◽  
pp. e0252650
Author(s):  
Janina Fett ◽  
Nils Oberschelp ◽  
Jo-Lâm Vuong ◽  
Thimo Wiewelhove ◽  
Alexander Ferrauti
Keyword(s):  
Skill Acquisition ◽  
Performance Enhancement ◽  
Ball Impact ◽  
Tennis Players ◽  
Starting Position ◽  
Target Field ◽  
Junior Tennis ◽  
Tennis Serve ◽  
Multiple Characteristics ◽  
And Performance

Purpose According to the official rules of the International Tennis Federation, players have to serve alternately from two different positions: the deuce (right, D) and the ad court (left, AD) side. This study aimed to compare body and ball kinematics of flat serves from both service sides. Methods In a controlled, semi-court laboratory setting, 14 elite male junior players served eight flat first serves to a target field directed to the receiver’s body from both service positions in a matched and counterbalanced order. An 8-camera-Vicon-System was used to capture the 3D-landmark trajectories. Results The mean service velocity was found to be similar on both sides (D: 151.4 ± 19.8 vs. AD: 150.5 ± 19.4 km/h), while multiple characteristics of the serve and ball kinematics differed significantly (p < .05). At starting, the front-foot angle relative to the baseline (D: 39.7±17.6° vs. AD: 31.1±17.4°) and lateral distance between the feet (D: 16.3 ± 12.9 cm vs. AD: 26.2 ± 11.9 cm) were significantly different. During the service, upper torso range of motion from maximum clockwise rotation until impact was significantly greater on the deuce court (D: 130.5 ± 19.8° vs. AD: 126.7 ± 21.1°). This was especially pronounced in foot-back technique players. Further, differences in the lateral ball impact location (D: 30.0 ± 24.1 cm vs. AD: 10.3 ± 23.3 cm) were observed. Conclusions Changing the service side affects the serve and ball kinematics in elite junior tennis players. Our results underline biomechanical differences regarding the starting position (feet and upper torso) as well as the movement and ball kinematics which could be relevant for skill acquisition, injury prevention and performance enhancement.

scholarly journals Secular trends in health-related physical fitness among 11–14-year-old Croatian children and adolescents from 1999 to 2014

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Mario Kasović ◽  
Lovro Štefan ◽  
Vilko Petrić
Keyword(s):  
Body Size ◽  
Physical Fitness ◽  
Children And Adolescents ◽  
Cardiorespiratory Fitness ◽  
Upper Body ◽  
Lower Body ◽  
Body Strength ◽  
Health Related ◽  
Upper Body Strength ◽  
Lower Body Power

AbstractThe main purpose of the study was to analyze secular trends of health-related physical fitness in 7–14-year-old Croatian children and adolescents from 1999 and 2014. In this observational cross-sectional study, we recruited 5077 children and adolescents between ages 11 and 14 (50.8% girls) from five primary schools located in the capital city of Zagreb. Physical fitness performance was tested from 1999 until 2014. Physical fitness performance included: (1) body-mass index (measure of body size), (2) standing broad jump (measure of lower-body power), (3) polygon backwards (measure of general coordination and agility), (4) sit-ups in 60 s (measure of upper-body strength), (5) sit-and-reach test (measure of flexibility) and (6) 6-min run test (measure of cardiorespiratory fitness). Boys performed better in all physical fitness tests, except for sit-and-reach test (p < 0.001). In boys, between 1999 and 2014, body size, upper-body strength and coordination/agility increased, while flexibility, lower-body power and cardiorespiratory fitness decreased. During the same period, girls experienced an increase in body size, lower-body power, upper-body strength, coordination/agility and flexibility, while cardiorespiratory fitness decreased. This study shows that cardiorespiratory fitness, flexibility and coordination/agility decrease, while upper-body strength increases in both sexes. These findings should serve as an avenue for national monitoring system to screen and track biological development in children and adolescents.

scholarly journals The relationship of some physical variables and performance angles to the strength of the straight serve for junior tennis

2021 ◽  
Vol 20 (4) ◽  
pp. 0061
Author(s):  
Zainab Shakir ◽  
Dr. Widad Kadhum
Keyword(s):  
The Body ◽  
Tennis Ball ◽  
Body Parts ◽  
Correlation Relationship ◽  
Tennis Players ◽  
Junior Tennis ◽  
Physical Variables ◽  
And Performance ◽  
Relationship Of ◽  
The Relationship

The problem of the research in determining the appropriate angles in the strength of serve for tennis age (14-16) year according to the specific biomechanical conditions, and the extent of the relationship of each variable of the physical variables in the successful performance of the skill of serve, and achieving the strength of transmission for tennis age (14-16) year, and it is one of the biomechanical principles that can be used in evaluating the angles of body parts. age (14-16) year tennis players. The aim of the research is to identify the percentage of the contribution of some physical variables of the straight serve for tennis juniors, and the percentage of the contribution of some corners of the body to the strength of serve for the tennis age (14-16) year (18) players. The two researchers reached a number of results, the most important of which are: There is a statistically significant correlation between some physical abilities and body angles with the straight serve for tennis players. The lower the angles (elbow, shoulder, knee for the front leg) at the moment of hitting the tennis ball, the stronger the serve will be. Correlation relationship with some biomechanical variables, because the skill of serve requires the strength of the striking arm during the performance of the straight serve

scholarly journals A comparison of the physical fitness, athletic performance and competitive achievements of junior and senior tennis players

2015 ◽  
Vol 4 ◽  
Author(s):  
Yuta KURODA ◽  
Natumi SUZUKI ◽  
Akimasa DEI ◽  
Kaoru UMEBAYASHI ◽  
Kazuki TAKIZAWA ◽  
...  
Keyword(s):  
Physical Fitness ◽  
Field Test ◽  
Athletic Performance ◽  
Whole Body ◽  
Endurance Capacity ◽  
Tennis Players ◽  
Average Group ◽  
Coaching Methods ◽  
Junior Tennis ◽  
Long Jump

<p>The Japan Tennis Association established the Tennis Field Test as a tool for aiding the development of effective coaching methods and improving the competitive achievements of individual elite tennis players. On the basis of such evaluations, specific coaching methods can be developed for individual tennis players. This study aims to evaluate the physical fitness and athletic performance of tennis players using the Tennis Field Test, and to compare these attributes between players of different ages and abilities. A total of 48 tennis players participated, of which 24 were junior players (including 15 regional representatives), and 24 were senior players (including 18 national representatives). The subjects were further subdivided into average and superior groups on the basis of their competitive achievements in regional or national tournaments. All subjects participated in the Tennis Field Test, which consists of the following six items: the number of sit-ups performed in 30 sec (an index of muscular endurance), the standing long jump distance (an index of leg power), the sit and reach test (an index of flexibility), the time taken to perform the spider run (an index of agility), the time taken to sprint 10 m (an index of speed), and the distance run in three minutes (an index of whole-body endurance capacity). In this study, the subjects’ sit and reach test data were not examined due to differences in the measurement methods used between junior and senior tennis players. Among the junior tennis players, the superior group performed faster in the spider run than the average group (p = 0.0011). Among the senior tennis players, the superior group achieved a longer mean distance during the three-minute run than the average group (p = 0.0223). The test results of the remaining items for both groups were relatively similar. This study suggests that competitive achievement is associated with agility among junior tennis players, and is associated with whole-body endurance capacity among senior tennis players.</p>

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