Daytime Alertness, Mood, Psychomotor Performances, and Oral Temperature during Ramadan Intermittent Fasting

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 alertnes...

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Bibliographic Details
Published in:Annals of nutrition and metabolism 2000, Vol.44 (3), p.101-107
Main Authors: Roky, Rachida, Iraki, Leila, HajKhlifa, Rachida, Ghazal, Nouria Lakhdar, Hakkou, Farid
Format: Article
Language:English
Subjects:
Adult
Affect
Air. Soil. Water. Waste. Feeding
Arousal
Biological and medical sciences
Circadian Rhythm
Environment. Living conditions
Fasting - physiology
Fasting - psychology
Humans
Islam
Male
Medical sciences
Morocco
Movement
Original Paper
Psychomotor Performance
Public health. Hygiene
Public health. Hygiene-occupational medicine
Temperature
Time Factors
Tropical medicine
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Summary: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 increased at 23.00 h. Mood decreased at 16.00 h. MRT was increased 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.
ISSN:0250-6807
1421-9697
DOI:10.1159/000012830