Intermittent Fasting Essay

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Original Paper Received: October 20, 1999 Accepted: March 17, 2000 Ann Nutr Metab 2000;44:101–107 Daytime Alertness, Mood, Psychomotor Performances, and Oral Temperature during Ramadan Intermittent Fasting Rachida Roky a Leila Iraki a Rachida HajKhlifa a Nouria Lakhdar Ghazal b Farid Hakkou a a Department of Pharmacology, Faculty of Medicine and Pharmacy, Casablanca, and de Recherche sur les Rythmes Biologiques, Laboratoire de Physiologie Animale, Faculté des Sciences, Rabat, Morocco b Groupe Key Words Human W Islamic fasting W Movement reaction time W Meal time W Feeding W Visual analogue scale W Alertness W Vigilance W Sleep creased at the beginning of Ramadan (R6) and CFF was not changed. These results showed that daytime oral temperature, subjective alertness and mood were decreased during Ramadan intermittent fasting. Copyright © 2000 S. Karger AG, Basel Abstract During the month of Ramadan, Moslems abstain from drinking and eating daily between sunrise and sunset. This change of meals schedule is accompanied with changes in sleep habit, which may affect diurnal alertness. This study examined the effect of Ramadan intermittent fasting on the diurnal alertness and oral temperature in 10 healthy young subjects. The cognitive task battery including movement reaction time (MRT), critical flicker fusion (CFF) and visual analogue scale, was administered at 6 different times of the day: 09.00, 11.00, 13.00, 16.00, 20.00 and 23.00 h on the 6th, 15th, and 28th days of Ramadan. The baseline day was scheduled one week before Ramadan, and the recovery day 18 days after this month. Oral temperature was measured prior to each test session and at 00.00 h. During Ramadan oral temperature decreased at 09.00, 11.00, 13.00, 16.00 and 20.00 h and increased at 23.00 and 00.00 h. Subjective alertness decreased at 09.00 and 16.00 h and

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