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Ramadan fasting does not adversely affect neuromuscular performances and reaction times in trained karate athletes.

Zarrouk N, Hammouda O, Latiri I, Adala H, Bouhlel E, Rebai H, Dogui M - J Int Soc Sports Nutr (2016)

Bottom Line: However, neither body mass nor body mass index was altered by RIF (F (2,14) = 0.80, p = 0.47 and F (2,14) = 0.78, p = 0.48, respectively).In addition, T lim (F (2,14) = 2.53, p = 0.12), MVC (F (2,14) = 0.51, p = 0.61) and associated electrical activity (F (2,14) = 0.13, p = 0.88) as well as neuromuscular efficiency (F (2,14) = 0.27, p = 0.76) were maintained during RIF.The present results showed that RIF did not adversely affect the neuromuscular performances and anthropometric parameters of elite karate athletes who were undertaking their usual training schedule.

View Article: PubMed Central - PubMed

Affiliation: Research Laboratory: "Medical Imaging Technologies" (LR 12ES06, TIM), Faculty of Medicine of Monastir, University of Monastir, Monastir, Tunisia ; Research Unit: "Education, Motricity, Sports and Health" (UR 15JS01), Higher Institute of Sport and Physical Education of Sfax, University of Sfax, Sfax, Tunisia.

ABSTRACT

Background: The present study aimed to investigate the concomitant effects of Ramadan intermittent fast (RIF) and muscle fatigue on neuromuscular performances and reaction times in young trained athletes.

Methods: Eight karate players (17.2 ± 0.5 years) were tested on three sessions: during a control period (S1: one week before Ramadan), and during the first (S2) and the fourth week of RIF (S3). Dietary intake and anthropometric measurements were assessed before each session. During each test session, participants performed maximal voluntary isometric contractions (MVC) and a submaximal contraction at 75 % MVC until exhaustion (T lim ) of the right elbow flexors. Surface electromyography was recorded from biceps brachii muscle during MVC and T lim . Simple (SRT) and choice (CRT) reaction times were evaluated at rest and just after T lim in a random order.

Results: The total daily energy (S2: +19.5 %, p < 0.05; S3: +27.4 %, p < 0.01) and water (S2: +26.8 %, p < 0.01; S3: +23.2 %, p < 0.05) intake were significantly increased during RIF. However, neither body mass nor body mass index was altered by RIF (F (2,14) = 0.80, p = 0.47 and F (2,14) = 0.78, p = 0.48, respectively). In addition, T lim (F (2,14) = 2.53, p = 0.12), MVC (F (2,14) = 0.51, p = 0.61) and associated electrical activity (F (2,14) = 0.13, p = 0.88) as well as neuromuscular efficiency (F (2,14) = 0.27, p = 0.76) were maintained during RIF. Moreover, neither SRT nor CRT was affected by RIF (F (2,14) = 1.82, p = 0.19 and F (2,14) = 0.26, p = 0.78, respectively) or neuromuscular fatigue (F (1,7) = 0.0002, p = 0.98 and F (1,7) = 3.78, p = 0.09, respectively).

Conclusions: The present results showed that RIF did not adversely affect the neuromuscular performances and anthropometric parameters of elite karate athletes who were undertaking their usual training schedule. In addition, neither RIF nor neuromuscular fatigue poorly affects reaction times in elite karate athletes.

No MeSH data available.


Related in: MedlinePlus

Experimental design. S1, S2 and S3: one week before Ramadan, the end of the first week of Ramadan, and the end of the last week of Ramadan, respectively; SRT: simple reaction time; CRT: choice reaction time; MVC: maximal voluntary isometric contraction of the elbow flexor; BB: biceps brachial muscle; Tlim: isometric sub-maximal elbow flexion contraction until exhaustion
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Fig1: Experimental design. S1, S2 and S3: one week before Ramadan, the end of the first week of Ramadan, and the end of the last week of Ramadan, respectively; SRT: simple reaction time; CRT: choice reaction time; MVC: maximal voluntary isometric contraction of the elbow flexor; BB: biceps brachial muscle; Tlim: isometric sub-maximal elbow flexion contraction until exhaustion

Mentions: All the assessments were performed between 04:30 pm and 06:30 pm on three occasions (Fig. 1). The first study session (S1) was performed one week before Ramadan, the second (S2) was performed at the end of the first week of Ramadan, and the third (S3) was performed at the end of the last week of Ramadan. The laboratory temperature was held between 22 and 24 °C, with an average relative humidity of 56 % during the testing periods.Fig. 1


Ramadan fasting does not adversely affect neuromuscular performances and reaction times in trained karate athletes.

Zarrouk N, Hammouda O, Latiri I, Adala H, Bouhlel E, Rebai H, Dogui M - J Int Soc Sports Nutr (2016)

Experimental design. S1, S2 and S3: one week before Ramadan, the end of the first week of Ramadan, and the end of the last week of Ramadan, respectively; SRT: simple reaction time; CRT: choice reaction time; MVC: maximal voluntary isometric contraction of the elbow flexor; BB: biceps brachial muscle; Tlim: isometric sub-maximal elbow flexion contraction until exhaustion
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4837563&req=5

Fig1: Experimental design. S1, S2 and S3: one week before Ramadan, the end of the first week of Ramadan, and the end of the last week of Ramadan, respectively; SRT: simple reaction time; CRT: choice reaction time; MVC: maximal voluntary isometric contraction of the elbow flexor; BB: biceps brachial muscle; Tlim: isometric sub-maximal elbow flexion contraction until exhaustion
Mentions: All the assessments were performed between 04:30 pm and 06:30 pm on three occasions (Fig. 1). The first study session (S1) was performed one week before Ramadan, the second (S2) was performed at the end of the first week of Ramadan, and the third (S3) was performed at the end of the last week of Ramadan. The laboratory temperature was held between 22 and 24 °C, with an average relative humidity of 56 % during the testing periods.Fig. 1

Bottom Line: However, neither body mass nor body mass index was altered by RIF (F (2,14) = 0.80, p = 0.47 and F (2,14) = 0.78, p = 0.48, respectively).In addition, T lim (F (2,14) = 2.53, p = 0.12), MVC (F (2,14) = 0.51, p = 0.61) and associated electrical activity (F (2,14) = 0.13, p = 0.88) as well as neuromuscular efficiency (F (2,14) = 0.27, p = 0.76) were maintained during RIF.The present results showed that RIF did not adversely affect the neuromuscular performances and anthropometric parameters of elite karate athletes who were undertaking their usual training schedule.

View Article: PubMed Central - PubMed

Affiliation: Research Laboratory: "Medical Imaging Technologies" (LR 12ES06, TIM), Faculty of Medicine of Monastir, University of Monastir, Monastir, Tunisia ; Research Unit: "Education, Motricity, Sports and Health" (UR 15JS01), Higher Institute of Sport and Physical Education of Sfax, University of Sfax, Sfax, Tunisia.

ABSTRACT

Background: The present study aimed to investigate the concomitant effects of Ramadan intermittent fast (RIF) and muscle fatigue on neuromuscular performances and reaction times in young trained athletes.

Methods: Eight karate players (17.2 ± 0.5 years) were tested on three sessions: during a control period (S1: one week before Ramadan), and during the first (S2) and the fourth week of RIF (S3). Dietary intake and anthropometric measurements were assessed before each session. During each test session, participants performed maximal voluntary isometric contractions (MVC) and a submaximal contraction at 75 % MVC until exhaustion (T lim ) of the right elbow flexors. Surface electromyography was recorded from biceps brachii muscle during MVC and T lim . Simple (SRT) and choice (CRT) reaction times were evaluated at rest and just after T lim in a random order.

Results: The total daily energy (S2: +19.5 %, p < 0.05; S3: +27.4 %, p < 0.01) and water (S2: +26.8 %, p < 0.01; S3: +23.2 %, p < 0.05) intake were significantly increased during RIF. However, neither body mass nor body mass index was altered by RIF (F (2,14) = 0.80, p = 0.47 and F (2,14) = 0.78, p = 0.48, respectively). In addition, T lim (F (2,14) = 2.53, p = 0.12), MVC (F (2,14) = 0.51, p = 0.61) and associated electrical activity (F (2,14) = 0.13, p = 0.88) as well as neuromuscular efficiency (F (2,14) = 0.27, p = 0.76) were maintained during RIF. Moreover, neither SRT nor CRT was affected by RIF (F (2,14) = 1.82, p = 0.19 and F (2,14) = 0.26, p = 0.78, respectively) or neuromuscular fatigue (F (1,7) = 0.0002, p = 0.98 and F (1,7) = 3.78, p = 0.09, respectively).

Conclusions: The present results showed that RIF did not adversely affect the neuromuscular performances and anthropometric parameters of elite karate athletes who were undertaking their usual training schedule. In addition, neither RIF nor neuromuscular fatigue poorly affects reaction times in elite karate athletes.

No MeSH data available.


Related in: MedlinePlus