Poorer Intermittent Sprints Performance in Ramadan-Fasted Muslim Footballers despite Controlling for Pre-Exercise Dietary Intake, Sleep and Training Load

Aziz, Abdul Rashid Abdul; Muhamad, Ahmad Munir Che; Roslan, Siti Raifana; Mohamed, Nazirah Ghulam; Singh, Rabindarjeet; Chia, Michael

doi:10.3390/sports5010004

Cited by 23 publications

(15 citation statements)

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“…The nocebo effects of observing the religious fasting could be a source of confusion. 34 However, the FET, reflecting the performed expiratory efforts, was unchanged (Table 2). Third, among the studies aiming to evaluate the effects of RF on healthy adults’ lung function data, no one included information about the elapsed time between the spirometry test and the last taken meal.…”

Section: Discussionmentioning

confidence: 99%

Does Ramadan Fasting Affect Spirometric Data of Healthy Adolescents?

Fraj

Miladi

Guezguez

et al. 2019

Clin Med Insights Pediatr

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Purpose: Several studies raised the effects of Ramadan fasting on healthy adults spirometric data, but none was performed in children. The aim of this study was to compare the spirometric data of a group of faster adolescents (n = 26) with an age-matched non-faster one (n = 10). Methods: This comparative quasi-experimental study, including 36 healthy males aged 12 to 15 years, was conducted during the summer 2015 (Ramadan: June 18 to July 16). Three sessions (Before-Ramadan [Before-R], Mid-Ramadan [Mid-R], After-Ramadan [After-R]) were selected for spirometry measurements. Spirometry was performed around 5.5 to 3.5 h before sunset and the spirometric data were expressed as percentages of local spirometric norms. Results: The two groups of fasters and non-fasters had similar ages and weights (13.35 ± 0.79 vs 12.96 ± 0.45 years, 46.8 ± 9.2 vs 41.7 ± 12.6 kg, respectively). There was no effect of Ramadan fasting on forced vital capacity (FVC), forced expiratory volume in 1 s (FEV1), FEV1/FVC, peak expiratory flow, and maximal mid-expiratory flow. For example, during the Before-R, Mid-R, and After-R sessions, there was no significant difference between the fasters and non-fasters mean FVC (101 ± 11 vs 99 ± 14, 101 ± 12 vs 102 ± 14, 103 ± 11 vs 104 ± 13, respectively) or FEV1 (101 ± 13 vs 96 ± 16, 98 ± 11 vs 97 ± 16, 101 ± 10 vs 98 ± 16, respectively). Conclusions: Ramadan fasting had no interaction effect with the spirometric data of Tunisian healthy male adolescents.

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Section: Discussionmentioning

confidence: 99%

Does Ramadan Fasting Affect Spirometric Data of Healthy Adolescents?

Fraj

Miladi

Guezguez

et al. 2019

Clin Med Insights Pediatr

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“…The unchanged performance of the 5-jump test could be explained in part by the short duration of this test. Performance decrements have been seen during longer periods of exercise that induce a sensation of fatigue [5,19,36].…”

Section: Discussionmentioning

confidence: 99%

“…Abdelmalek et al [22] and Aloui et al [38,39] suggested that a stable total energy intake between BR and during Ramadan could help to maintain physical performances over Ramadan. In contrast, Aziz et al [19] argued that inadequacies of food and fluid intake could contribute to poor performance during Ramadan.…”

Section: Discussionmentioning

confidence: 99%

“…Several previous studies reported that Ramadan observance caused disturbances in both the quantity and the quality of sleep [6,13,16,17] as well as modifying daily food and water intake [12,18]. Recently, Aziz et al [19] further suggested that Ramadan fasting can affect short-term maximal performance even if the dietary intake, hours of sleeping and training loads are well maintained. Another possible adverse influence comes from changes in alertness and/or mood states.…”

Section: Introductionmentioning

confidence: 99%

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Short-term maximal performance, alertness, dietary intake, sleep pattern and mood states of physically active young men before, during and after Ramadan observance

et al. 2019

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Purpose To assess changes in short-term maximal performance, alertness, dietary intake, sleep pattern and mood states of physically active young men before (BR), during and after Ramadan observance. Methods Twelve physically-active men (age: 21.9±2.4yrs, height:1.77±0.09m, body-mass: 72.6±7.8kg, exercising: ≥3h/week) performed the 5-jump and the digit-cancellation (alertness) tests 15-days BR, on the first (FR) and last 10-days of Ramadan (ER) and 10-days (AR10) and 20-days (AR20) after Ramadan. During each period, sleep pattern (Pittsburgh-Sleep-Quality-Index (PSQI)), mood states (Profile-of-Mood-States ( POMS)) and dietary intake were recorded. Results No significant changes in the 5-jump, digit-cancellation test and POMS parameters appeared during and after Ramadan relative to BR. However, the PSQI total score was lower during FR compared to AR10 (p<0.001). Specifically, the subjective sleep quality was lower ( i ) at BR compared to FR (p<0.05), AR10 (p<0.01) and AR20 (p<0.01) and ( ii ) at ER and AR20 compared to FR (p<0.05). The sleep duration ( i ) increased at FR (p<0.05) and (ii) decreased at AR10 (p<0.01) and AR20 (p<0.05) compared to BR. Sleep disturbances were significantly greater ( i ) at BR compared to FR (p<0.01), ER (p<0.01), AR10 (p<0.05) and AR20 (p<0.05) and (ii) at AR10 and AR20 compared to FR and ER (p<0.05). In terms of diet, the fractional contribution of carbohydrate (%) was lower and the dietary fat content (g) was higher during ER than AR10 and AR20 (p<0.05). Further, the dietary protein (in %) was significantly lower during FR compared to BR (p<0.01), ER (p<0.05), AR10 (p<0.05) and AR20 (p<0.05). Conclusion Ramadan had no-adverse effects on the 5-jump performance, alertness, or mood states in physically active young men. However, the sleep duration was shorter and the sleep quality was improved following compared to during Ramadan. The fractional intake of fat also increased at the expense of carbohydrate during Ramadan, and the protein intake was lower at the beginning of Ramadan than before, at the end of and after Ramadan.

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“…A recent systematic review concluded that RDF had no influence on the majority of physical performance parameters including strength, aerobic performance, jump height, fatigue and total work, though it negatively affected sprint performance [ 12 ]. In another study that controlled for food intake, sleeping time and training load, RDF appeared to reduce prolonged intermittent sprint performance in football players [ 13 ]. Zarrouk et al concluded that RDF did not decrease neuromuscular performance, nor did it affect anthropometric parameters of athletes who engaged in RDF [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

Sleep Quality and Performance in Professional Athletes Fasting during the Month of Ramadan

Lipert

Kozłowski

Rasmus

et al. 2021

IJERPH

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Background: Maintaining physical performance during Ramadan Diurnal Fasting (RDF) is a challenge for professional athletes. The literature shows that sleep disturbances experienced by athletes during RDF are associated with reduced physical performance. The effect of sleep quality on physical performance, and the effect of work status on physical performance during RDF among athletes, besides engaging in trainings, have been little investigated. This study aims to evaluate the effect of RDF on the physical performance of professional athletes taking into consideration their sleep quality and work status. Methods: Professional medium-distance male runners (n = 32) participated in our study in the summer of 2019. Data about socio-demographics, training characteristics, sleep quality (Pittsburg Sleep Quality Index: PSQI), physical performance (Cooper Test; Harvard step test) were collected before and during Ramadan. Student’s-test and Welch and Wilcoxon tests were used for data analysis. Results: Both quality of sleep and physical performance of athletes deteriorated during Ramadan. People with better quality of sleep had better physical fitness/performance both before and during RDF. Athletes who worked beside trainings achieved worse physical fitness test results and had worse quality of sleep. Conclusions: Policies aimed to improve physical performance in RDF should consider the quality of sleep and the work status of athletes.

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Poorer Intermittent Sprints Performance in Ramadan-Fasted Muslim Footballers despite Controlling for Pre-Exercise Dietary Intake, Sleep and Training Load

Cited by 23 publications

References 49 publications

Does Ramadan Fasting Affect Spirometric Data of Healthy Adolescents?

Does Ramadan Fasting Affect Spirometric Data of Healthy Adolescents?

Short-term maximal performance, alertness, dietary intake, sleep pattern and mood states of physically active young men before, during and after Ramadan observance

Sleep Quality and Performance in Professional Athletes Fasting during the Month of Ramadan

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