Single-joint isometric rate of torque development is not related to counter- movement jump performance in soccer players

2013 ◽  
Vol 21 (3) ◽  
pp. 181-186 ◽  
Author(s):  
Eurico N. Wilhelm ◽  
Regis Radaelli ◽  
Bruna G.C. da Silva ◽  
Cíntia E. Botton ◽  
Rafael Barbosa ◽  
...  
Keyword(s):  
Soccer Players ◽  
Jump Performance ◽  
Rate Of Torque Development ◽  
Counter Movement Jump ◽  
Torque Development

scholarly journals Isometric and dynamic strength and neuromuscular attributes as predictors of vertical jump performance in 11- to 13-year-old male athletes

2017 ◽  
Vol 42 (9) ◽  
pp. 924-930 ◽  
Author(s):  
Brandon John McKinlay ◽  
Phillip J. Wallace ◽  
Raffy Dotan ◽  
Devon Long ◽  
Craig Tokuno ◽  
...  
Keyword(s):  
Vastus Lateralis ◽  
Peak Torque ◽  
Soccer Players ◽  
Neural Activation ◽  
Male Athletes ◽  
Neuromuscular Activation ◽  
Jump Performance ◽  
Rate Of Torque Development ◽  
Dynamic Contractions ◽  
Torque Development

In explosive contractions, neural activation is a major factor in determining the rate of torque development, while the latter is an important determinant of jump performance. However, the contribution of neuromuscular activation and rate of torque development to jump performance in children and youth is unclear. The purpose of this study was to examine the relationships between the rate of neuromuscular activation, peak torque, rate of torque development, and jump performance in young male athletes. Forty-one 12.5 ± 0.5-year-old male soccer players completed explosive, unilateral isometric and dynamic (240°/s) knee extensions (Biodex System III), as well as countermovement-, squat-, and drop-jumps. Peak torque (pT), peak rate of torque development (pRTD), and rate of vastus lateralis activation (Q30) during the isometric and dynamic contractions were examined in relation to attained jump heights. Isometric pT and pRTD were strongly correlated (r = 0.71) but not related to jump performance. Dynamic pT and pRTD, normalized to body mass, were significantly related to jump height in all 3 jumps (r = 0.38–0.66, p < 0.05). Dynamic normalized, but not absolute pRTD, was significantly related to Q30 (r = 0.35, p < 0.05). In young soccer players, neuromuscular activation and rate of torque development in dynamic contractions are related to jump performance, while isometric contractions are not. These findings have implications in the choice of training and assessment methods for young athletes.

Barbell Deadlift Training Increases the Rate of Torque Development and Vertical Jump Performance in Novices

2015 ◽  
Vol 29 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Brennan J. Thompson ◽  
Matt S. Stock ◽  
JoCarol E. Shields ◽  
Micheal J. Luera ◽  
Ibrahim K. Munayer ◽  
...  
Keyword(s):  
Vertical Jump ◽  
Jump Performance ◽  
Rate Of Torque Development ◽  
Torque Development

scholarly journals ACUTE EFFECT OF DIFFERENT WARM-UP INTERVENTIONS ON NEUROMUSCULAR PERFORMANCE OF RECREATIONAL SOCCER PLAYERS

2017 ◽  
Vol 25 (3) ◽  
pp. 43
Author(s):  
Bernardo Neme Ide ◽  
Alexandre Moreira ◽  
Bradley Jon Schoenfeld ◽  
Leandro Lodo ◽  
Audrei Dos Reis Santos ◽  
...  
Keyword(s):  
Exercise Intervention ◽  
Acute Effect ◽  
Soccer Players ◽  
Jump Performance ◽  
Squat Jump ◽  
Warm Up ◽  
Exercise Interventions ◽  
Neuromuscular Performance ◽  
Recreational Athletes ◽  
Counter Movement Jump

Pre-exercises interventions are frequently implemented in order to maximize athletic performance. In this sense, the aim of this study was to evaluated the effect of three distinct pre-exercise interventions on acute neuromuscular performance in recreational soccer players: 1) parallel squat; 2) static stretching; and 3) ballistic stretching. After all interventions, participants performed a flexibility evaluation (sit-and-reach-test), followed by a squat jump, a counter-movement jump and a 30 meter-sprint test. A one-way analysis of variance revealed: a) a significant decrease in jumping performance was induced by both Stretching conditions when compared to the parallel squat intervention; b) a significant increase in lower limb flexibility after both stretching interventions when compared to parallel squat. In conclusion, it is suggested that a pre-exercise intervention comprised of stretching exercises can acutely increase flexibility, while impairing jump performance in recreational athletes.

scholarly journals The simple, conventional markers of fatigue - variations in neuromuscular performance, creatine kinase and hydration status in elite soccer players over a season.

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Catherine E. Beattie ◽  
◽  
Samuel A Pullinger ◽  
Cristian Savoia ◽  
Ben J. Edwards ◽  
...  
Keyword(s):  
Creatine Kinase ◽  
Urine Osmolality ◽  
Soccer Players ◽  
Hydration Status ◽  
Jump Performance ◽  
Time Points ◽  
Neuromuscular Performance ◽  
Professional Soccer ◽  
Jump Test ◽  
Counter Movement Jump

Background and Purpose: Fixture congestion, game-intensities and limited recovery negatively influence physical/physiological responses during a competitive soccer season. Therefore, the aim of the investigation was to examine weekly alterations in neuromuscular performance markers, creatine kinase and hydration in elite soccer players throughout a season. Study Design: Longitudinal Observational Study. Methods: Sixteen male professional soccer players competing in the English Football League Championship were assessed over the course of a season. All players provided a urine sample, a blood sample to assess creatine-kinase concentration and performed a countermovement jump test at the start of the season, in-season, pre-and post-match over 38 weeks. Results: Jump height was the most common marker of performance to be significantly reduced in-season compared to baseline (-5.4 to -11.3%, P<0.05) with 45.2% of the time-points affected. Measures of FT:CT (-7.5 to -12.4%) and AP (-9.4 to -11.5%), also showed significant deteriorations throughout the season compared to baseline (P<0.05) at several time-points. Max force (MF) significantly increased in-season (+5.1 to 7.0%) in 20% of the observed time-points compared to baseline. CK concentration significantly increased during 19% of the time-points (P<0.05; 62 to 159%). Urine osmolality demonstrated significant differences in season compared to baseline, but none to levels of dehydration. Conclusion: Monitoring elite soccer players over the course of a competitive season shows alterations in neuromuscular performance and hydration status. These data suggest that assessing counter-movement jump performance may be a useful marker for monitoring responses to training/competition, while creatine-kinase and hydration status may be limited.

Morning Priming Exercise Strategy to Enhance Afternoon Performance in Young Elite Soccer Players

2020 ◽  
pp. 1-8
Author(s):  
Federico Donghi ◽  
Ermanno Rampinini ◽  
Andrea Bosio ◽  
Maurizio Fanchini ◽  
Domenico Carlomagno ◽  
...  
Keyword(s):  
Physical Performance ◽  
Contractile Properties ◽  
Rating Of Perceived Exertion ◽  
Soccer Players ◽  
Sprint Running ◽  
Repeated Sprint ◽  
Rate Of Torque Development ◽  
Priming Exercise ◽  
Positive Effect ◽  
Torque Development

Purpose: To compare the effects of different modalities of morning priming exercise on afternoon physical performance with the associated hormonal and psychophysiological responses in young soccer players. Methods: In a randomized counterbalanced crossover design, 12 young soccer players completed 3 different morning conditions on 3 different days: repeated-sprint running (6 × 40 m), easy exercise (4 × 12 fast half squats, 6 speed ladder drills, and 20-m sprints), and control (no exercise). Blood testosterone and cortisol concentrations were assessed upon arrival (approximately 8:30AM) and approximately 5 hours and 30 minutes later. Body temperature, self-reported mood, quadriceps neuromuscular function (maximal voluntary contraction, voluntary activation, rate of torque development, and twitch contractile properties), jump, and sprint performance were evaluated twice per day, while rating of perceived exertion, motivation, and the Yo-Yo Intermittent Recovery level 2 (IR2) tests were assessed once per day. Results: Compared with the control, repeated-sprint running induced a possible positive effect on testosterone (+11.6%) but a possible to very likely negative effect on twitch contractile properties (−13.0%), jump height (−1.4%), and Yo-Yo IR2 (−7.1%). On the other hand, easy exercise had an unclear effect on testosterone (−3.3%), resulted in lower self-reported fatigue (−31.0%) and cortisol (−12.9%), and had a possible positive effect on the rate of torque development (+4.3%) and Yo-Yo IR2 (+6.5%) compared with the control. Conclusions: Players’ testosterone levels were positively influenced by repeated-sprint running, but this did not translate into better physical function, as both muscular and endurance performance were reduced. Easy exercise seemed to be suitable to optimize the physical performance and psychophysiological state of young soccer players.

scholarly journals Musculotendinous Stiffness of Triceps Surae, Maximal Rate of Force Development, and Vertical Jump Performance

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Tarak Driss ◽  
Daniel Lambertz ◽  
Majdi Rouis ◽  
Hamdi Jaafar ◽  
Henry Vandewalle
Keyword(s):  
Vertical Jump ◽  
Triceps Surae ◽  
Maximal Rate ◽  
Plantar Flexor ◽  
Jump Performance ◽  
Force Development ◽  
Rate Of Torque Development ◽  
And Performance ◽  
Torque Development ◽  
Musculotendinous Stiffness

The relationships between ankle plantar flexor musculotendinous stiffness (MTS) and performance in a countermovement vertical jump (CMJ) and maximal rate of torque development (MRTD) were studied in 27 active men. MTS was studied by means of quick releases at 20 (S0.2), 40 (S0.4), 60 (S0.6), and 80% (S0.8) of maximal voluntary torque (TMVC). CMJ was not correlated with strength indices but was positively correlated with MRTD/BM,S0.4/BM. The slopeα2and interceptβ2of the torque-stiffness relationships from 40 to 80%TMVCwere correlated negatively (α2) and positively (β2) with CMJ. The different stiffness indices were not correlated with MRTD. The prediction of CMJ was improved by the introduction of MRTD in multiple regressions between CMJ and stiffness. CMJ was also negatively correlated with indices of curvature of the torque-stiffness relationship. The subjects were subdivided in 3 groups in function of CMJ (groups H, M, and L for high, medium, and low performers, resp.). There was a downward curvature of the torque-stiffness relationship at high torques in group H or M and the torque-stiffness regression was linear in group L only. These results suggested that torque-stiffness relationships with a plateau at high torques are more frequent in the best jumpers.

Changes of rate of torque development in soccer players after a Loughborough Intermittent Shuttle Test: Effect of bovine colostrum supplementation

2020 ◽  
Vol 28 (1) ◽  
pp. 59-72
Author(s):  
Yiannis Kotsis ◽  
Spyridon Methenitis ◽  
Anastasia Mikellidi ◽  
Cleopatra Aresti ◽  
Eleni Persia ◽  
...  
Keyword(s):  
Bovine Colostrum ◽  
Soccer Players ◽  
Rate Of Torque Development ◽  
Torque Development ◽  
Loughborough Intermittent Shuttle Test
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