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

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.

scholarly journals A low-dose, 6-week bovine colostrum supplementation maintains performance and attenuates inflammatory indices following a Loughborough Intermittent Shuttle Test in soccer players

2017 ◽  
Vol 57 (3) ◽  
pp. 1181-1195 ◽  
Author(s):  
Yiannis Kotsis ◽  
Anastasia Mikellidi ◽  
Cleopatra Aresti ◽  
Eleni Persia ◽  
Aristomenis Sotiropoulos ◽  
...  
Keyword(s):  
Low Dose ◽  
Bovine Colostrum ◽  
Soccer Players ◽  
Loughborough Intermittent Shuttle Test

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.

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

Knee flexor strength, rate of torque development and flexibility in women and men with patellofemoral pain: Relationship with pain and the single leg bridge test

2021 ◽  
Author(s):  
Matheus Henrique Maiolini Ducatti ◽  
Marina Cabral Waiteman ◽  
Ana Flávia Balotari Botta ◽  
Helder dos Santos Lopes ◽  
Neal Robert Glaviano ◽  
...  
Keyword(s):  
Patellofemoral Pain ◽  
Knee Flexor ◽  
Rate Of Torque Development ◽  
Torque Development ◽  
Flexor Strength

Blockade of 5-HT2 receptors suppresses rate of torque development and motor unit discharge rate during rapid contractions

2021 ◽  
Author(s):  
Benjamin Ian Goodlich ◽  
Sean A Horan ◽  
Justin J Kavanagh
Keyword(s):  
Motor Unit ◽  
Unit Activity ◽  
Repeated Measures ◽  
Discharge Rate ◽  
Voluntary Contraction ◽  
Unit Discharge ◽  
Motor Unit Activity ◽  
Rate Of Torque Development ◽  
Motor Unit Discharge ◽  
Torque Development

Serotonin (5-HT) is a neuromodulator that is critical for regulating the excitability of spinal motoneurons and the generation of muscle torque. However, the role of 5-HT in modulating human motor unit activity during rapid contractions has yet to be assessed. Nine healthy participants (23.7 ± 2.2 yr) ingested 8 mg of the competitive 5-HT2 antagonist cyproheptadine in a double-blinded, placebo-controlled, repeated-measures experiment. Rapid dorsiflexion contractions were performed at 30%, 50% and 70% of maximal voluntary contraction (MVC), where motor unit activity was assessed by high-density surface electromyographic decomposition. A second protocol was performed where a sustained, fatigue-inducing dorsiflexion contraction was completed prior to undertaking the same 30%, 50% and 70% MVC rapid contractions and motor unit analysis. Motor unit discharge rate (p < 0.001) and rate of torque development (RTD; p = 0.019) for the unfatigued muscle were both significantly lower for the cyproheptadine condition. Following the fatigue inducing contraction, cyproheptadine reduced motor unit discharge rate (p < 0.001) and RTD (p = 0.024), where the effects of cyproheptadine on motor unit discharge rate and RTD increased with increasing contraction intensity. Overall, these results support the viewpoint that serotonergic effects in the central nervous system occur fast enough to regulate motor unit discharge rate during rapid powerful contractions.

scholarly journals Muscle rate of torque development in female futsal players

2017 ◽  
Vol 2017 (S4A) ◽  
pp. 29-37
Author(s):  
Ana Carolina de M A Rodrigues ◽  
Nathália Arnosti Vieira ◽  
Sergio Augusto Cunha ◽  
Sérgio Rocha Piedade
Keyword(s):  
Rate Of Torque Development ◽  
Torque Development
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