scholarly journals Fitness testing in tennis: Influence of anthropometric characteristics, physical performance, and functional test on serve velocity in professional players

PLoS ONE ◽  
2021 ◽  
Vol 16 (11) ◽  
pp. e0259497
Author(s):  
Alejandro Sánchez-Pay ◽  
Jesús Ramón-Llin ◽  
Rafael Martínez-Gallego ◽  
David Sanz-Rivas ◽  
Bernardino Javier Sánchez-Alcaraz ◽  
...  
Keyword(s):  
Physical Performance ◽  
Body Mass ◽  
Functional Test ◽  
Hand Strength ◽  
Physical Parameters ◽  
Countermovement Jump ◽  
Physical Test ◽  
Tennis Players ◽  
Shot Put ◽  
Medicine Ball

The aims of this study were to examine the relationship between anthropometric variables, physical performance, and functional test with serve velocity regarding tennis players’ level and to design regression models that effectively predict serve velocity. A sample of sixteen male tennis players participated in this study (national level = 8, professional level = 7). Anthropometric measurements (body mass, height, body mass index and body segments) and physical test (hand strength, countermovement jump, jump on serve, and serve velocity) and functional test (medicine ball throw overhead and shot put) were performed. No differences in anthropometrics and physical test were found between national and professional levels. A significant positive correlation (p < 0.05, ranging for 0.603 to 0.932) was found between some anthropometrics measurements (body mass, height, arm, forearm, and leg segments), physical parameters (hand strength, countermovement jump) and functional test (medicine ball throw shot put and overhead) with serve velocity for all tennis players. Multiple regression analysis indicated that medicine ball throw shot put was the most important test to explain serve velocity (r2 = 0.869). The results showed how the combination of physical and anthropometric factors have an impact on serve velocity. In addition, a new functional fitness test (medicine ball throw shot put) is proposed as an alternative to traditional medicine ball throw overhead due to its high reproducibility (inter-trial reliability) and predictive validity values, as well as by multi-segmental coordination movement similar to tennis serve.

scholarly journals Differences in Body Fat, Body Mass Index, and Physical Performance of Specific Field Tests in 10-to-12-Year-Old School-Aged Team Handball Players

2020 ◽  
Vol 10 (24) ◽  
pp. 9022
Author(s):  
Souhail Hermassi ◽  
Maha Sellami ◽  
Georg Fieseler ◽  
El Ghali Bouhafs ◽  
Lawrence D. Hayes ◽  
...  
Keyword(s):  
Body Mass Index ◽  
Physical Performance ◽  
Body Mass ◽  
Body Fat ◽  
Fat Body ◽  
Age Groups ◽  
Physical Parameters ◽  
Anthropometric Parameter ◽  
Fat Body Mass ◽  
Medicine Ball

This study aimed to compare 10-to-12-year-old Qatari male athletes and assess body fat, body mass index, and physical fitness, as well as the difference of these measures between ages. Thirty-five youth handball players volunteered for the investigation and were divided into three groups: 12-year-old players (U12; n = 12), 11-year-old players (U11; n = 11), 10-year-old players (U10; n = 12). Anthropometry was assessed by body mass, body fat percentage (%BF), and body mass index (BMI). Measurements included the Yo-Yo Intermittent Recovery Test Level 1 (Yo-Yo IR1), jumping ability (squat and countermovement jumps (SJ and CMJ, respectively)), and sprint tests (10 and 15 m). The power of the upper extremity was measured by a 2-kg overhead medicine ball throw for distance. Except for %BF (p = 0.387) and BMI (p = 0.070), all anthropometric and demographic parameters were different between age groups. The largest differences were found for body mass (p = 0.007) and body height (p = 0.008). Regarding fitness parameters, only the medicine ball throw (p = 0.022) was different between age groups (U10 vs. U12: p = 0.009; U11 vs. U12: p = 0.048). There was no difference between groups for jumping (CMJ: p = 0.586; SJ: p = 0.377), sprinting (10 m: p = 0.211; 15 m: p = 0.194) and Yo-Yo IR1 (p = 0.228). Body fat was the anthropometric parameter with the strongest relationship with physical performance in that lower body fat was related to superior jumping performance and sprint performance. In conclusion, except for %BF and BMI, all anthropometric parameters were different between U10, U11, and U12 handball players. For physical parameters, jumping, sprinting, and endurance performance were not different between age groups. From a practical perspective, coaches can use these findings as reference for the evaluation of their school-aged handball players, as well as for establishing performance goals.

Effects of contrast strength training with elastic band program on sprint, jump, strength, balance and repeated change of direction in young female handball players

2021 ◽  
pp. 174795412110507
Author(s):  
Mehrez Hammami ◽  
Nawel Gaamouri ◽  
Yosser Cherni ◽  
Mohamed Souhaiel Chelly ◽  
Lee Hill ◽  
...  
Keyword(s):  
Strength Training ◽  
Physical Performance ◽  
Young Female ◽  
T Test ◽  
Countermovement Jump ◽  
Elastic Band ◽  
Change Of Direction ◽  
Repeated Sprint ◽  
Back Extensor ◽  
Medicine Ball

Maximal strength, power and his derivates (sprint, change of direction repeatedly and jump) are considered as major determinants of success in elite handball players. Contrast strength training with elastic band (CSTEB) program is form of resistance training, and may play an important method of training to improve this quality. This study examined the effects of 10-week contrast strength training with elastic band (CSTEB) program on physical performance in young female handball players. Thirty participants (age: 15.7  ±  0.3 years; body mass: 63.7  ±  3.7 kg; body height: 166.8  ±  3.8 cm; body fat: 26.9  ±  3.4; and Maturity-offset: 2.9  ±  0.3 years) were randomly assigned between experimental group (EG; n = 15) and control group (CG; n = 15). Two-way analyses of variance (group × time) were assessed for handgrip; back extensor; medicine ball throw; 30-m sprint times; Modified Illinois change-of-direction (Illinois-MT); four jump tests [(squat jump (SJ), countermovement jump (CMJ), countermovement jump with arms (CMJA) and five jump test (5JT)]; static (stork) and dynamic (Y balance) balance tests; and repeated sprint T-test (RSTT). The EG enhanced all strength performance [handgrip right, handgrip left, back extensor strength and medicine ball throw (p < 0.001)] compared to CG. The EG enhanced all sprint performance. The EG also improved performance in the Illinois-MT. All jump performance improved significantly [SJ (p = 0.007), CMJ (p = 0.001) and CMJA (p = 0.001)] except 5JT in the EG. Of the same, 3 of 4 repeated sprint T-test scores [RSTT-Best-Time, RSTT-Mean-Time and RSTT-Total-Time] increased significantly in the EG relative to the CG. Conversely, there were no significant changes in balance performance between groups. It is concluded that 10-weeks of CSTEB improved physical performance (strength, sprint, change of direction, jump, and repeated change of direction) measures in young female handball players.

Effects of Resisted Sprints With Changes of Direction Through Several Relative Loads on Physical Performance in Soccer Players

2019 ◽  
Vol 14 (8) ◽  
pp. 1022-1028 ◽  
Author(s):  
David Rodríguez-Osorio ◽  
Oliver Gonzalo-Skok ◽  
Fernando Pareja-Blanco
Keyword(s):  
Physical Performance ◽  
Body Mass ◽  
External Load ◽  
Soccer Players ◽  
Countermovement Jump ◽  
Change Of Direction ◽  
Before And After ◽  
Moderate Load ◽  
Run Test ◽  
Positive Effect

Purpose: To compare the effects of resisted change-of-direction (COD) movements, using several relative loads, on soccer players’ physical performance. Methods: Fifty-four male soccer players were randomly assigned to 1 of the following 3 groups, which differed only in the magnitude of the external load used during the COD training: COD training without external load (COD-0; n = 16), COD training with a 12.5% body-mass external load (COD-12.5; n = 19), and COD training with a 50% body-mass external load (COD-50; n = 19). Participants performed the specific COD training twice per week for 6 wk. Before and after the training period, a battery of tests was completed: countermovement jump, 30-m running sprint (time in 10 m [T10], 20 m [T20], and 30 m [T30]), L-run test, and V-cut test. Results: Within-group comparisons showed substantial improvements in countermovement jump and T10 (likely) in COD-0, whereas countermovement jump, T10, and T20 were substantially enhanced (possibly to likely) in COD-50. COD-12.5 induced substantial improvements in all analyzed variables (likely to most likely). Between-groups comparisons showed better effects on all analyzed variables for COD-12.5 than for COD-0 (possibly to very likely), whereas COD-50 only showed possibly better effects than COD-0 on T10. In addition, COD-12.5 induced a better effect on L-run and V-cut tests than COD-50 (possibly to likely). Conclusions: These results indicate that COD training, especially moderate load (12.5% body mass) resisted COD training, may have a positive effect on COD skills, running sprint performance, and jumping ability in young soccer players.

scholarly journals Effects of Beetroot Juice Ingestion on Physical Performance in Highly Competitive Tennis Players

Nutrients ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 584 ◽  
Author(s):  
Álvaro López-Samanes ◽  
Alberto Pérez-López ◽  
Victor Moreno-Pérez ◽  
Fabio Yuzo Nakamura ◽  
Jorge Acebes-Sánchez ◽  
...  
Keyword(s):  
Physical Performance ◽  
Handgrip Strength ◽  
Good Evidence ◽  
Test Battery ◽  
Low Doses ◽  
Beetroot Juice ◽  
Countermovement Jump ◽  
Isometric Handgrip ◽  
Tennis Players ◽  
Inorganic Nitrate

Beetroot juice (BJ) contains high levels of inorganic nitrate (NO3−) and its intake has good evidence in increasing blood nitrate/nitrite concentrations. The ingestion of BJ has been associated with improvements in physical performance of endurance sports, however the literature in intermittent sports is scarce. The aim of this study was to investigate whether BJ could improve physical performance in tennis players. Thirteen well-trained tennis players (25.4 ± 5.1 years) participated in the study during their preparatory period for the tennis season. Subjects were randomly divided into two groups and performed a neuromuscular test battery after either BJ or placebo (PLA) consumption. Both trials were executed on two separate days, in randomized order, with one week of wash out period. The test battery consisted of serve velocity test (SVT), countermovement jump (CMJ), isometric handgrip strength (IHS), 5-0-5 agility test (5-0-5), and 10 m sprint (10-m). No significant differences were found in SVT (1.19%; p = 0.536), CMJ (0.96%; p = 0.327), IHS (4.06%; p = 0.069), 5-0-5 dominant and nondominant side (1.11–2.02%; p = 0.071–0.191) and 10-m (1.05%; p = 0.277) when comparing BJ and PLA ingestion. Thus, our data suggest that low doses of BJ (70 mL) consumption do not enhance tennis physical performance.

scholarly journals Jumping-based Asymmetries are Negatively Associated with Jump, Change of Direction, and Repeated Sprint Performance, but not Linear Speed, in Adolescent Handball Athletes

2020 ◽  
Vol 71 (1) ◽  
pp. 47-58 ◽  
Author(s):  
Marc Madruga-Parera ◽  
Chris Bishop ◽  
Paul Read ◽  
Jason Lake ◽  
Jon Brazier ◽  
...  
Keyword(s):  
Physical Performance ◽  
Body Mass ◽  
Body Height ◽  
Kappa Coefficient ◽  
Countermovement Jump ◽  
Linear Speed ◽  
Change Of Direction ◽  
Multiple Tests ◽  
Training Interventions ◽  
Repeated Sprint

AbstractThe aim of the present study was to determine the association of multi-directional jumping asymmetries with measures of physical performance. Forty-two youth handball athletes (age: 16.0 ± 1.3 years; body height: 174.11 ± 7.3 cm; body mass: 70.49 ± 13.3 kg) performed a mid-season fitness test battery consisting of single leg countermovement, lateral and broad jump tests, two change of direction speed (CODS) tests, an 8 x 10 m repeated sprint test, and a 20 m sprint. The Kappa coefficient showed only ‘slight’ levels of agreement (K range = -0.05 to 0.15), indicating that asymmetries rarely favoured the same side during each of the jump tests. The single leg countermovement jump showed significantly (p = 0.006) larger asymmetries (11.2 ± 8.4) than the broad jump (6.4 ± 4.6) and significant correlations were present between jumping asymmetries and jump (r = -0.32 to -0.52), CODS (r = 0.31 to 0.32) and repeated sprint (r = 0.35 to 0.40) performance. The findings of the present study highlight the independent nature of jumping asymmetries and associations with measures of physical performance. Practitioners are encouraged to use multiple tests to detect existing side differences and consider appropriate training interventions for the reduction of inter-limb asymmetries.

scholarly journals Physical Fitness and Academic Performance in Normal Weight, Overweight, and Obese Schoolchild Handball Players in Qatar: A Pilot Study

2021 ◽  
Vol 11 ◽  
Author(s):  
Souhail Hermassi ◽  
Lawrence D. Hayes ◽  
Nicola Luigi Bragazzi ◽  
René Schwesig
Keyword(s):  
Academic Performance ◽  
Physical Fitness ◽  
Physical Performance ◽  
Body Mass ◽  
Body Fat ◽  
Normal Weight ◽  
Performance Parameters ◽  
Fat Percentage ◽  
Overweight Group ◽  
Medicine Ball

This study aimed to investigate the relationships between physical fitness and academic performance in youth handball players of different BMI classifications. Thirty-three male handball players (age: 10.3 ± 0.61 years; body mass: 47.1 ± 12.1 kg; height: 1.43 ± 0.09 m; BMI: 23.1 ± 4.37 kg/m2; body fat: 20.6 ± 6.27%) were recruited from the Qatar handball first league and were assigned to their BMI age-adjusted groups (i.e., normal weight, overweight, and obese). Measurements included anthropometric data (height, mass, body mass index (BMI) and body fat percentage (%BF), and physical performance tests: agility T-half test; squat jump (SJ), and countermovement jump (CMJ), 10 and 15 m sprint; medicine ball throw (MBT). Aerobic capacity was evaluated using the Yo-Yo Intermittent Recovery Test level 1 (Yo-Yo IR1). Academic achievement was assessed through school records of grades point average (GPA) of Mathematics, Science and Arabic. None academic performance parameter and four physical performance parameters (agility T-half: p = 0.035; CMJ: p = 0.001; SJ: p = 0.007; sprint 10 m: p = 0.028) were different between BMI related groups. In 43% (3/7) of performance parameters and all academic parameters, the normal weight group showed the highest performance level, whereas the overweight group had the best performance in both sprint tests. The obese group was only superior in the medicine ball throw, but not at the p &lt; 0.05 level. A relevant relationship (r &gt; 0.5) between academic and physical performance parameters was only found between Yo-Yo IR 1 and science (r = 0.548). A relevant correlation were found between CMJ and BMI (r = −0.569). The agility T-half test was correlated with CMJ (r = −0.614) and 10 m sprint (r = 0.523). These findings suggest being overweight or obese are related to science academic performance among schoolchildren athletes in Qatar. Possibly, a normal BMI could positively influence academic performance. Physical education teachers, staff, and administrators should be cognizant that health promotion interventions improving composition may have the additional potential to improve dimensions of academic performance.

scholarly journals Transcranial Alternating Current Stimulation (tACS) Does Not Affect Sports People’s Explosive Power: A Pilot Study

2021 ◽  
Vol 15 ◽  
Author(s):  
Andreina Giustiniani ◽  
Giuseppe Battaglia ◽  
Giuseppe Messina ◽  
Hely Morello ◽  
Salvatore Guastella ◽  
...  
Keyword(s):  
Physical Performance ◽  
Genetic Background ◽  
Alternating Current ◽  
Sport Performance ◽  
Countermovement Jump ◽  
Gamma Frequency ◽  
Explosive Power ◽  
Hands On ◽  
Transcranial Alternating Current Stimulation ◽  
Medicine Ball

Purpose: This study is aimed to preliminary investigate whether transcranial alternating current stimulation (tACS) could affect explosive power considering genetic background in sport subjects.Methods: Seventeen healthy sports volunteers with at least 3 years of sports activities participated in the experiment. After 2 weeks of familiarization performed without any stimulation, each participant received either 50 Hz-tACS or sham-tACS. Before and after stimulation, subjects performed the following tests: (1) the squat jump with the hands on the hips (SJ); (2) countermovement jump with the hands on the hips (CMJ); (3) countermovement jump with arm swing (CMJ-AS); (4) 15-s Bosco’s test; (5) seated backward overhead medicine ball throw (SBOMBT); (6) seated chest pass throw (SCPT) with a 3-kg rubber medicine ball; and (7) hand-grip test. Additionally, saliva samples were collected from each participant. Genotyping analysis was carried out by polymerase chain reaction (PCR).Results: No significant differences were found in sport performance of subjects after 50 Hz-tACS. Additionally, we did not find any influence of genetic background on tACS-related effect on physical performance. These results suggest that tACS at gamma frequency is not able to induce an after-effect modulating sport performance. Further investigations with larger sample size are needed in order to understand the potential role of non-invasive brain stimulation techniques (NIBS) in motor performances.Conclusions: Gamma-tACS applied before the physical performance fails to improve explosive power in sport subjects.

scholarly journals Specific Physical Ability Prediction in Youth Basketball Players According to Playing Position

2022 ◽  
Vol 19 (2) ◽  
pp. 977
Author(s):  
Jelena Ivanović ◽  
Filip Kukić ◽  
Gianpiero Greco ◽  
Nenad Koropanovski ◽  
Saša Jakovljević ◽  
...  
Keyword(s):  
Physical Performance ◽  
Body Mass ◽  
Reference Model ◽  
Body Height ◽  
Field Tests ◽  
Physical Characteristics ◽  
Lower Limbs ◽  
Countermovement Jump ◽  
Basketball Players ◽  
Training Programmes

This study investigated the hierarchical structure of physical characteristics in elite young (i.e., U17-U19) basketball players according to playing positions. In addition, their predictive value of physical characteristics was determined for the evaluation of players’ physical preparedness. Sixty elite male basketball players performed 13 standardized specific field tests in order to assess the explosive power of lower limbs, speed, and change-of-direction speed. They were divided into three groups according to playing positions (guard [n = 28], forward [n = 22], center [n = 10]). The basic characteristics of the tested sample were: age = 17.36 ± 1.04 years, body height = 192.80 ± 4.49 cm, body mass = 79.83 ± 6.94 kg, and basketball experience = 9.38 ± 2.10 years for guards; age = 18.00 ± 1.00 years, body height = 201.48 ± 3.14 cm, body mass = 90.93 ± 9.85 kg, and basketball experience = 9.93 ± 2.28 years for forwards; and age = 17.60 ± 1.43 years; body height = 207.20 ± 3.29 cm, body mass = 104.00 ± 9.64 kg, and basketball experience = 9.20 ± 1.62 years for centers. For all playing positions factor analysis extracted three factors, which cumulatively explained 76.87, 88.12 and 87.63% of variance, respectively. The assessed performance measures were defined as significant (p < 0.001), with regression models of physical performance index (PPINDEX). PPINDEX of guards = −6.860 + (0.932 × t-test) − (1.656 × Acceleration 15 m) − (0.020 × Countermovement jump); PPINDEX of forwards = −3.436 − (0.046 × Countermovement jump with arm swing) − (1.295 × Acceleration 15 m) + (0.582 × Control of dribbling); PPINDEX of centers = −4.126 + (0.604 × Control of dribbling) − (1.315 × Acceleration 15 m) − (0.037 × Sargent jump). A model for the evaluation of physical performance of young basketball players has been defined. In addition, this model could be used as a reference model for selection procedures, as well as to monitor the efficacy of applied training programmes within the short, medium and long-term periodization.

The Effects of 3-Month Skill-Based and Plyometric Conditioning on Fitness Parameters in Junior Female Volleyball Players

2018 ◽  
Vol 30 (3) ◽  
pp. 353-363 ◽  
Author(s):  
Kemal Idrizovic ◽  
Bahri Gjinovci ◽  
Damir Sekulic ◽  
Ognjen Uljevic ◽  
Paulo Vicente João ◽  
...  
Keyword(s):  
Body Mass ◽  
Body Height ◽  
Medium Effect ◽  
Plyometric Training ◽  
Countermovement Jump ◽  
Significant Group ◽  
Volleyball Players ◽  
Medium Effect Size ◽  
Fitness Parameters ◽  
Medicine Ball

Purpose:This study compared the effects of skill-based and plyometric conditioning (both performed in addition to regular volleyball training twice a week for 12 wk) on fitness parameters in female junior volleyball players.Methods:The participants [n = 47; age: 16.6 (0.6) y; mass: 59.4 (8.1) kg; height: 175.1 (3.0) cm] were randomized into a plyometric (n = 13), a skill-based (n = 17), and a control (n = 17) groups. The variables included body height, body mass, calf girth, calf skinfold, corrected calf girth, countermovement jump, 20-m-sprint, medicine ball toss, and sit-and-reach test.Results:Two-way analysis of variance (time × group) effects for time were significant (P < .05) for all variables except body mass. Significant group × time interactions were observed for calf skinfold [η2 = .14; medium effect size (ES)], 20-m sprint (η2 = .09; small ES), countermovement jump (η2 = .29; large ES), medicine ball (η2 = .58; large ES), with greater gains (reduction of skinfold) for plyometric group, and sit-and-reach (η2 = .35; large ES), with greater gains in plyometric and skill-based groups. The magnitude-based inference indicated positive changes in 1) medicine ball toss and countermovement jump for all groups; 2) sit-and-reach for the plyometric and skill-based groups; and 3) 20-m sprint, calf girth, calf skinfold, and corrected calf girth for plyometric group only.Conclusion:Selected variables can be improved by adding 2 plyometric training sessions throughout the period of 12 weeks. Additional skill-based conditioning did not contribute to improvement in the studied variables compared with regular volleyball training.

scholarly journals Análisis de los componentes físicos y antropométricos de jóvenes futbolistas chilenos desde la categoría Sub-13 a Sub-19 (Analysis of the physical and anthropometric components of young Chilean footballers from category Sub-13 to Sub-19)

Retos ◽  
2020 ◽  
pp. 547-555
Author(s):  
Joel Barrera ◽  
Luis Valenzuela Contreras ◽  
Fernando Maureira ◽  
Hugo Sarmento
Keyword(s):  
Physical Performance ◽  
Body Mass ◽  
Field Tests ◽  
Soccer Players ◽  
Countermovement Jump ◽  
Lower Margin ◽  
Scientific Publications ◽  
Relative Age ◽  
Margin Of Error ◽  
Objective Tests

  Objetivo: describir el perfil antropométrico y condicional de jóvenes futbolistas chilenos desde la categoría Sub-13 a Sub-19, proponiendo una batería de pruebas objetivas, que permita proporcionar una serie de indicadores validos de medición. Metodología: se aplicaron pruebas de campo de agilidad 20 m zigzag, aceleración 10 m, velocidad 30 m, Running based anaerobic sprint test (RAST), Yo-Yo IR1 y salto contramovimiento (CMJ), sumado a las medidas antropométricas de altura y masa corporal. Resultados: Los resultados demostraron que los atletas de las categorías más jóvenes (Sub-13, Sub-14 y Sub-15) son más altos que los informados en otras publicaciones científicas. Además, el 73,2% de los atletas nació en los dos primeros trimestres del año de selección, dejando en evidencia el efecto de edad relativa. Las categorías Sub-13 y Sub-14 presentaron el mayor número de diferencias al comparar sus medias en las diferentes variantes. Conclusión: La mayor presencia de pruebas objetivas permiten determinar el rendimiento físico de los jóvenes futbolista, esto a su vez consiente en crear un estándar de selección más objetivo y con un menor margen de error para los entrenadores.  Abstract. Objective: to describe the anthropometric and fitness profile of young Chilean soccer players from the Sub-13 to Sub-19 category, proposing a battery of objective tests, which allows providing a series of valid measurement indicators. Methodology: field tests of agility 20 m zigzag, acceleration 10 m, speed 30 m, running based anaerobic sprint test (RAST), Yo-Yo IR1 and countermovement jump (CMJ) were applied, added to anthropometric measurements of height and body mass. Results: The results showed that the athletes in the youngest categories (Sub-13, Sub-14 and Sub-15) are higher than those reported in other scientific publications. In addition, 73.2% of athletes were born in the first two quarters of the selection year, revealing the effect of relative age. Categories Sub-13 and Sub-14 presented the greatest number of differences when comparing their means in the different variants. Conclusion: The greater presence of objective tests allows us to determine the physical performance of young soccer players, this in turn allows us to create a more objective selection standard and with a lower margin of error for coaches.

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