The effect of time-of-day and judo match on short-term maximal performances in judokas

Chtourou, Hamdi; Aloui, Asma; Chaouachi, Anis; Chamari, Karim; Souissi, Nizar

doi:10.1080/09291016.2012.756269

Cited by 44 publications

(41 citation statements)

References 38 publications

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“…In this context, previous studies have shown that squat jumps (SJs) ) and maximal voluntary contraction (MVC) were significantly higher in the afternoon than the morning. Similarly, during high-intensity cycling exercises, previous reports have shown higher performances in the afternoon hours Chtourou et al 2013a). Likewise, oral temperature is time-of-day dependent, with high afternoon values and morning nadirs (Deschenes et al 1998;Hammouda et al 2011Hammouda et al , 2012.…”

Section: Introductionmentioning

confidence: 84%

Post-resistance training detraining: time-of-day effects on training and testing outcomes

Chtourou

Ammar

Nikolaidis

et al. 2015

Biological Rhythm Research

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Section: Introductionmentioning

confidence: 84%

Post-resistance training detraining: time-of-day effects on training and testing outcomes

Chtourou

Ammar

Nikolaidis

et al. 2015

Biological Rhythm Research

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“…The subjects were familiarized with the experimental testing procedures before the commencement of the study [ 10 ] . During this session, anthropometrical measurements and resistance load verifi cations for the training exercises were also determined [ 12 , 17 ] .…”

Section: Methodsmentioning

confidence: 99%

Reducing Resistance Training Volume during Ramadan Improves Muscle Strength and Power in Football Players

et al. 2013

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We aimed to examine the effect of maintaining or reducing resistance training volume during Ramadan-intermittent-fasting (RIF) on short-term maximal performances. 20 footballers (age: 18.4 ± 0.8 years; body-mass: 72.4 ± 4.1 kg; height: 183.4 ± 4.6 cm) were matched and randomly assigned to a normal-training-group (G1) or a tapering-group (G2). They were tested for muscular strength (maximal-voluntary-contraction) and power (squat-jump and counter-movement-jump) 1 month before RIF (T0), 1 week before RIF (T1), after 2 weeks of fasting (T2) and at the end of RIF (T3). From T1 to T2, subjects performed a whole-body resistance training program (8-repetitions × 4-sets with 4-min recovery in-between). During RIF, G1 maintained the same training program, while G2 performed a period of reduced training volume (3 sets/exercise; - 22%). Muscle strength and power increased significantly from T0 to T1, from T0 to T2 and from T0 to T3 in G1 and G2 and from T1 to T2 and from T1 to T3 only in G2 (p<0.05). Performance was higher in G2 than G1 during T2 (p<0.01). Moreover, the ∆-change of performance between T0 and T2 and T3 was significantly higher in G2 than G1 (p<0.05). For young soccer players, a tapering period characterized by a reduced training volume during RIF may lead to significant improvement in muscle strength and power.

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“…Circadian rhythms cause daily fluctuations in measures of the cognitive and physical performances (van Dongen 2006;Chtourou et al 2013). The sleep-wake cycle, which have more fundamental rhythms, may be disturbed in various settings and its disruption can have consequences on cognitive and physical performance (Dorrian et al 2006;Eriksen et al 2006;Folkard et al 2006;Persson et al 2006;Petrilli et al 2006;Reilly & Edwards 2006;Dagan & Doljansky 2007).…”

Section: Introductionmentioning

confidence: 99%

Effect of time of day and partial sleep deprivation on the reaction time and the attentional capacities of the handball goalkeeper

Jarraya

Chtourou

et al. 2013

Biological Rhythm Research

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The aim of this study was to investigate the effects of the time of day and partial sleep deprivation on cognitive performances (i.e., attention and reaction time [RT]) of the handball goalkeeper (GK). The protocol involved 12 healthy GK volunteer males (age: 18.5 ± 1.7 years, level of experience: 8.3 ± 2.4 years, height: 1.80 ± 5.8 cm; body-mass: 79 ± 4.2 kg). They performed three cognitive tasks, i.e. the RT test, the Stroop test, and the barrage test, respectively, to evaluate the RT, the selective attention (SA), and the constant attention (CA) following the two situations of partial sleep deprivation, i.e. in the beginning (SDB) and the end (SDE) of the night, and a reference night which is a full night of habitual sleep. Resting oral temperature was measured at the beginning of each test session. Each of the three experimental conditions was separated by a 72-h period. The analysis of variance revealed a significant sleep deprivation Â test-time effect on the RT, the SA, and the CA. These variables decreased significantly from morning to afternoon for all three experimental conditions. It seems that the RT is more affected by SDE than SDB (p < 0.05; À41% vs. 49% after SDE and SDB, respectively); however, SA and CA are more affected by SDB than SDE (p < 0.05; 63% vs. 47% for SA and 39% vs. 29% for CA after SDB and SDE, respectively). Furthermore, the partial sleep deprivation causes a phase advance of the core temperature. In addition, cognitive performances are not in phase with the rhythm of core temperature for all three experimental conditions. In conclusion, the partial sleep deprivation negatively affect cognitive performances in the handball goalkeeper.

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The effect of time-of-day and judo match on short-term maximal performances in judokas

Cited by 44 publications

References 38 publications

Post-resistance training detraining: time-of-day effects on training and testing outcomes

Post-resistance training detraining: time-of-day effects on training and testing outcomes

Reducing Resistance Training Volume during Ramadan Improves Muscle Strength and Power in Football Players

Effect of time of day and partial sleep deprivation on the reaction time and the attentional capacities of the handball goalkeeper

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