N - 10 Impact du jeûn du Ramadan sur les fonctions attentionnelles

Moutawakil, Bouchra El; Hassounr, S.; Sibai, M.; Rafai, M.A.; Fabrigoule, Colette

doi:10.1016/s0035-3787(07)90595-0

Cited by 10 publications

(5 citation statements)

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“…Several previous investigations have reported alterations of alertness, memory, reaction time and psychomotor performance during Ramadan observance [8,31,32,33]. However, the present findings disagree with earlier data in showing that cognitive function was unaffected by Ramadan observance [34,35].…”

Section: Discussioncontrasting

confidence: 99%

Sleep Patterns, Alertness, Dietary Intake, Muscle Soreness, Fatigue, and Mental Stress Recorded before, during and after Ramadan Observance

Boukhris

Trabelsi

Shephard

et al. 2019

Sports

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Ramadan is one of the pillars of the Islamic creed. Its observance commonly causes chrono-biological changes. The present study examined sleep and alertness during Ramadan observance relative to data collected before and after Ramadan in a sample of young, physically active men. Information was also collected on dietary intake, muscle soreness, fatigue, and mental stress over the three periods. Fourteen physically active men (age: 21.6 ± 3.3 years, height: 1.77 ± 0.06 m, body-mass: 73.1 ± 9.0 kg) completed the Hooper questionnaire and the Pittsburgh Sleep Quality Index (PSQI) and responded to the digit cancellation test (DCT) fifteen days before Ramadan, during the last ten days of Ramadan and 20 days after Ramadan. The PSQI results indicated that sleep duration was significantly longer before Ramadan (p = 0.003) and after Ramadan (p = 0.04) compared to during Ramadan and was longer before Ramadan than after Ramadan (p = 0.04). In addition, the sleep efficiency was lower during Ramadan in comparison to before Ramadan (p = 0.02) and after Ramadan (p = 0.04). The daytime dysfunction score increased during Ramadan in comparison with before Ramadan (p = 0.01) and after Ramadan (p = 0.04), and the sleep quality score was higher during (p = 0.003) and after Ramadan (p = 0.04) as compared to before Ramadan. The sleep disturbance score increased during Ramadan relative to before Ramadan (p = 0.04). However, Ramadan observance had no significant effect on sleep latency. Mental alertness also decreased at the end of Ramadan compared to before (p = 0.003) or after Ramadan (p = 0.01). Dietary intake, muscle soreness, fatigue, and mental stress as estimated by the Hooper questionnaire remained unchanged over the three periods of the investigation (p > 0.05). In conclusion, Ramadan observance had an adverse effect on sleep quantity and on mental alertness, but not on sleep quality. However, dietary intake, muscle soreness, fatigue, and mental stress remained unaffected.

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Section: Discussioncontrasting

confidence: 99%

Sleep Patterns, Alertness, Dietary Intake, Muscle Soreness, Fatigue, and Mental Stress Recorded before, during and after Ramadan Observance

Boukhris

Trabelsi

Shephard

et al. 2019

Sports

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“…Regarding RIF, previous studies that have assessed psychomotor performance have reported conflicting results. In fact, while some studies have reported no adverse effects of RIF on psychomotor performance in Muslim athletes [ 23 , 24 ], other studies have demonstrated that some indicators of psychomotor performance, such as critical flicker fusion [ 21 ], daytime alertness [ 22 ], irritability [ 50 ], memory [ 51 ], functional attention [ 54 ], continuous attention and reaction time [ 22 , 55 ] were impaired by RIF in sedentary subjects. It could be argued that fasted athletes have a greater mental and stronger motivation to perform cognitive tasks compared to sedentary subjects [ 52 ].…”

Section: Discussionmentioning

confidence: 99%

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

Zarrouk

Latiri

Adala

et al. 2016

Journal of the International Society of Sports Nutrition

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BackgroundThe 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.MethodsEight 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 (Tlim) of the right elbow flexors. Surface electromyography was recorded from biceps brachii muscle during MVC and Tlim. Simple (SRT) and choice (CRT) reaction times were evaluated at rest and just after Tlim in a random order.ResultsThe 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, Tlim (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).ConclusionsThe 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.

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“…Furthermore, our results are in accordance with the study of Tian et al (42), which revealed a beneficial effect of RDIF on visual attention for Muslim athletes. However, other studies revealed a significant decline in attentional performance induced by RDIF in sedentary individuals (88,113,114).…”

Section: Discussionmentioning

confidence: 83%

Time-restricted feeding and cognitive function in sedentary and physically active elderly individuals: Ramadan diurnal intermittent fasting as a model

et al. 2022

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ObjectivesThis study aimed to investigate the effects of Ramadan diurnal intermittent fasting (RDIF) on cognitive performance, sleep quality, daytime sleepiness, and insomnia in physically active and sedentary elderly individuals.MethodsA total of 58 participants (62.93 ± 3.99 years) were assigned to one of the following two groups: a sedentary group (control group) who observed Ramadan (n = 32) and a physically active group (n = 26) who continued to train while observing Ramadan. Participants were assessed 2 weeks before Ramadan and during the fourth week of Ramadan. On each occasion, participants completed a digital assessment of their cognitive performance and responded to the Pittsburgh sleep quality index (PSQI), the insomnia severity index (ISI) and the Epworth sleepiness scale (ESS) questionnaires to assess sleep parameters.ResultsCompared to before Ramadan, performance in executive function (p = 0.035), attention (p = 0.005), inhibition (p = 0.02), associative memory (p = 0.041), and recognition memory (p = 0.025) increased significantly during Ramadan in the physically active group. For the sedentary group, associative learning performance decreased (p = 0.041), whilst performances in the remaining domains remained unchanged during Ramadan. Global PSQI, ISI, and ESS scores indicated both groups suffered from poor sleep quality and excessive daytime sleepiness, with significantly higher negative effects of RDIF observed in the sedentary group.ConclusionOlder adults who continue to train at least three times per week during Ramadan may improve their cognitive performance, despite the impairment of sleep quality. Future studies in older adults during Ramadan including objective measures of sleep (e.g., polysomnography, actigraphy) and brain function (e.g., functional magnetic resonance imaging) are warranted.

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N - 10 Impact du jeûn du Ramadan sur les fonctions attentionnelles

Cited by 10 publications

References 0 publications

Sleep Patterns, Alertness, Dietary Intake, Muscle Soreness, Fatigue, and Mental Stress Recorded before, during and after Ramadan Observance

Sleep Patterns, Alertness, Dietary Intake, Muscle Soreness, Fatigue, and Mental Stress Recorded before, during and after Ramadan Observance

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

Time-restricted feeding and cognitive function in sedentary and physically active elderly individuals: Ramadan diurnal intermittent fasting as a model

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