Objective assessment of drowsiness and reaction time during intermittent Ramadan fasting in young men: a case-crossover study

BaHammam, Ahmed S.; Nashwan, Samar Z.; Hammad, Omeima; Sharif, Munir M.; Pandi-Perumal, Seithikurippu R.

doi:10.1186/1744-9081-9-32

Cited by 54 publications

(10 citation statements)

References 47 publications

(77 reference statements)

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“…It is important to note that despite reporting impacted sleep architecture/schedule in Muslims fasting during Ramadan, previous investigators [ 36 , 39 ] reported no effect on the arousal index or daytime sleepiness. Another study also showed no impact of RIF on daytime sleepiness, drowsiness or vigilance [ 40 ], suggesting no potential major effect of these variables on cognitive function. In the light of the present study results, it is speculated that the cyclists were probably not in negative alertness and vigilance states.…”

Section: Discussionmentioning

confidence: 99%

Impact of Ramadan intermittent fasting on cognitive function in trained cyclists: a pilot study

et al. 2016

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This study assessed selected measures of cognitive function in trained cyclists who observed daylight fasting during Ramadan. Eleven cyclists volunteered to participate (age: 21.6±4.8 years, VO2max: 57.7±5.6 ml kg−1·min−1) and were followed for 2 months. Cognitive function (Cambridge Neuropsychological Test Automated Battery (CANTAB), Reaction Time index (RTI) and Rapid Visual Information Processing (RVP) tests) and sleep architecture (ambulatory EEG) were assessed: before Ramadan (BR), in the 1st week (RA1) and 4th week of Ramadan (RA4), and 2 weeks post-Ramadan (PR). Both cognitive tests were performed twice per day: before and after Ramadan at 8-10 a.m. and 4-6 p.m., and during Ramadan at 4-6 p.m. and 0-2 a.m., respectively. Training load (TL) by the rating of perceived exertion (RPE) method and wellness (Hooper index) were measured daily. If the TL increased over the study period, this variable was stable during Ramadan. The perceived fatigue and delayed onset muscle soreness (DOMS) increased at RA4. Sleep patterns and architecture showed clear disturbances, with significant increases in the number of awakenings and light sleep durations during Ramadan (RA1 and RA4), together with decreased durations of deep and REM sleep stages at PR. RTI (simple and multiple reaction index) reaction and movement times did not vary over the study period. The RVP test showed reduced false alarms during Ramadan, suggesting reduced impulsivity. Overall accuracy significantly increased at RA1, RA4 and PR compared to baseline. At RA4, the accuracy was higher at 0-2 a.m. compared to 4-6 p.m. Despite the observed disturbances in sleep architecture, Ramadan fasting did not negatively impact the cognitive performance of trained cyclists from the Middle East.

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Section: Discussionmentioning

confidence: 99%

Impact of Ramadan intermittent fasting on cognitive function in trained cyclists: a pilot study

et al. 2016

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“…These periods were specified in accordance with the literature. 24 Completing the questionnaire and the fatigue scale took approximately 10 to 15 minutes.…”

Section: Methodsmentioning

confidence: 99%

Does Ramadan Fasting Affect Fatigue in Nurses?

Ovayolu

Taşan³

2016

Holistic Nursing Practice

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The purpose of this study was to evaluate the effect of Ramadan fasting on fatigue in nurses. The study was conducted between June 19 and July 27, 2014, with a descriptive design. This study was completed with 99 nurses working in a public hospital in the city of Gaziantep located in the Southeastern Anatolia Region of Turkey. The data of the study were collected by using a questionnaire and the Piper Fatigue Scale. The Piper Fatigue Scale includes 4 subscale/dimensional scores and total fatigue scores. Higher scores indicate more fatigue. Statistical significance levels were set at P < .05. It was determined that the fatigue subscale and total mean scores of nurses increased in a statistically significant manner except for the affective subscale after the month of Ramadan (P < .05). In addition, it was found that the fatigue mean scores of those, who were working for 0 to 4 years, were employed in surgery units, and evaluated their health as bad, were higher (P > .05). The Ramadan fasting increased fatigue levels of nurses. Therefore, it is of vital importance to evaluate fatigue levels of nurses especially in the month of Ramadan and take the necessary precautions in terms of patient and personnel safety.

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“…Another study assessed the impact of diurnal IF during Ramadan on drowsiness under controlled conditions with a fixed light/dark exposure, caloric intake, sleep/wake schedule and sleep duration via measuring total blink duration (measured using infrared reflectance (IR) oculography) and the mean reaction time (MRT) 61. The results of this study showed that diurnal intermittent fasting had no impact on drowsiness or vigilance 61…”

Section: Daytime Sleepinessmentioning

confidence: 99%

How does diurnal intermittent fasting impact sleep, daytime sleepiness, and markers of the biological clock? Current insights

Almeneessier¹,

BaHammam²

2018

NSS

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Mealtimes and feeding schedules may interfere with the circadian system and impact sleep. The practice of intermittent fasting (IF) in its different formats is increasing worldwide. However, most studies addressing the effect of IF on circadian rhythms, daytime sleepiness, and sleep architecture have been conducted during diurnal IF for Ramadan. In this article, we analyze the effect of diurnal IF on the circadian clock, sleep, and daytime sleepiness. In free-living, unconstrained environments that do not control for lifestyle changes such as sleep/wake schedules, sleep duration, and light exposure, studies have demonstrated sudden and significant delays in bedtime and wake time during diurnal intermittent fasting for Ramadan. However, subsequent studies that accounted for lifestyle factors and sleep/wake patterns have reported no changes in markers of the biological clock, daytime sleepiness, or sleep parameters. Nevertheless, several researchers have demonstrated a reduction in the proportion of rapid eye movement stage sleep as the significant alteration in sleep architecture during fasting.

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Objective assessment of drowsiness and reaction time during intermittent Ramadan fasting in young men: a case-crossover study

Cited by 54 publications

References 47 publications

Impact of Ramadan intermittent fasting on cognitive function in trained cyclists: a pilot study

Impact of Ramadan intermittent fasting on cognitive function in trained cyclists: a pilot study

Does Ramadan Fasting Affect Fatigue in Nurses?

How does diurnal intermittent fasting impact sleep, daytime sleepiness, and markers of the biological clock? Current insights

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