The effect of Ramadan intermittent fasting on dynamic postural control in judo athletes

Souissi, Nafaa; Chtourou, Hamdi; Ferchichi, H.; Dziri, C.; Abedelmalek, Salma; Souissi, Nizar

doi:10.1080/09291016.2013.787759

Cited by 7 publications

(2 citation statements)

References 40 publications

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“…NFS 49,3 464 of fasting for 29-30 days during the month of Ramadan, the ninth month of the lunar calendar. Ramadan fasting entails abstaining from eating, drinking and smoking from dawn to dusk, with free consumption of food and fluids at night (Chtourou et al, 2012;Souissi et al, 2014), leading to changes in feeding habits, sleep cycle (Roky et al, 2003;Waterhouse, 2010) and other circadian rhythms (Reilly and Edwards, 2007;Roky et al, 2012). Previous studies investigating cognitive function during Ramadan fasting have produced conflicting results.…”

Section: Introductionmentioning

confidence: 99%

Is spatial orientation affected by Ramadan fasting?

Razzak¹,

Mohamed²,

Alshaiji³

et al. 2019

NFS

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1 Abstract Purpose-Ramadan intermittent fasting (RIF) has produced heterogeneous and domain-specific effects on cognitive function. The present study investigates the effect of RIF on verticality perception or estimation of subjective visual vertical (SVV) in young adults. The significance of SVV is that it is essential for spatial orientation, upon which many daily activities depend.Methodology -Verticality perception was assessed with a computerized version of the Rod and Frame Test (CRFT) in two visual conditions: without a surrounding frame, and with a distracting tilted frame. The tilted frame condition measures level of visual dependence, or reliance of visual cues for posture and orientation. 39 young adult male males were recruited at different stages of Ramadan fasting: 21 were tested at the end of the first week (Week 1) and 18 others at the end of the third week (Week 3) of Ramadan. 39 participants were also recruited to serve as a non-fasting control group. Factorial ANOVA analyses were conducted to identify the main effects of fasting status, time-of-day and the interaction between them on blood glucose levels, nocturnal sleep duration and vertical alignment errors. Findings-The main effect of fasting status on glucose level was significant (P = 0.03). There was a significant time-of-day main effect on glucose levels (P = 0.007) and sleep duration (P = 0.004) only in fasting participants. Neither the main effects of fasting status nor time-of-day were significant for rod alignment errors in both visual conditions. The interaction of fasting status and time-of-day was not significant either. This may indicate that any negative effect of Ramadan fasting on activities that are critically dependent on verticality perception and spatial orientation, such as sports and driving, may not be due to verticality misperception.Originality-The present study was the first to investigate the effect of Ramadan fasting on spatial orientation. It demonstrated robustness of verticality perception to fasting status and the point of fasting during Ramadan. Verticality perception was also unaffected by time of day effects in nonfasting and fasting groups at two different points of Ramadan. This study corroborates others reporting heterogeneous effects of Ramadan fasting on cognitive function.

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Section: Introductionmentioning

confidence: 99%

Is spatial orientation affected by Ramadan fasting?

Razzak¹,

Mohamed²,

Alshaiji³

et al. 2019

NFS

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“…Recently, it has been found that attentional capacities in trained adults are time-of-day dependent, with the best values observed in the afternoon for reaction time [9,10]. Physiology & Behavior 142 (2015) [146][147][148][149][150][151] Several studies have reported that postural control is influenced by the time-of-day [6,[11][12][13][14][15]. It has been reported that the postural control is low between 05:00 and 08:00 h [11,16] corresponding to the bathyphase of the body temperature rhythm [17] and around 13:00 h [18] corresponding to the post-lunch dip observed in the vigilance level [19].…”

Section: Introductionmentioning

confidence: 99%

Time-of-day effects on postural control and attentional capacities in children

Baccouch

Zarrouk

Chtourou

et al. 2015

Physiology & Behavior

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Ramadan Fasting Effects on Postural Control in the Elderly: A Comparison Between Fallers and Non-fallers

et al. 2016

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Our purpose was to compare the effects of Ramadan fasting on postural control in elderly fallers and non-fallers. The protocol involved twenty-four healthy old volunteer males divided into two groups: fallers (mean age = 75.43 ± 5.26 years, weight = 67.25 ± 5.30 kg and height = 1.65 ± 0.02 m) and non-fallers (mean age = 72.3 ± 6.42 years, weight = 65.5 ± 6.15 kg and height = 1.64 ± 0.03 m). Participants performed a simple reaction time test (SRT) and a postural control protocol on four different occasions: one week before Ramadan (BR), during the second (SWR) and the fourth week (FWR) of Ramadan and three weeks after Ramadan (AR). Center of pressure (CoP) parameters [the CoP medial-lateral length (CoP), and the CoP antero-posterior length (CoP)] were assessed using a force platform under two surface conditions: Firm surface and Foam surface. The results showed that Ramadan fasting influences similarly fallers and non-fallers. In fact, for both groups, the CoP and the CoP values increased significantly during the SWR and the FWR compared to BR. These CoP parameters decreased significantly in the Firm surface conditions in the FWR. Moreover, the CoP parameters were significantly higher during the FWR and AR in comparison with BR in the Foam surface conditions. However, the amplitude of increase of the CoP % and the CoP % (ΔCoP % and ΔCoP %) between BR and the SWR was significantly higher in the fallers than non-fallers. The SRT of elderly fallers and non-fallers was significantly higher in the SWR and in the FWR compared to BR. In conclusion, Ramadan fasting alters similarly postural control of elderly fallers and non-fallers, but the amplitude (ΔCoP % and ΔCoP %) of this alteration seems to be more pronounced in fallers than non-fallers. A probable beginning of adaptation occurs at the FWR. However, three weeks seems to be insufficient to recover postural control alterations due to Ramadan fasting in difficult sensory conditions in elderly fallers and non-fallers.

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The effect of Ramadan intermittent fasting on dynamic postural control in judo athletes

Cited by 7 publications

References 40 publications

Is spatial orientation affected by Ramadan fasting?

Is spatial orientation affected by Ramadan fasting?

Time-of-day effects on postural control and attentional capacities in children

Ramadan Fasting Effects on Postural Control in the Elderly: A Comparison Between Fallers and Non-fallers

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