Objective: To study the effect of Ramadan fast (RF) on body composition, plasma constituents, hematology, and cardiorespiratory responses to constant submaximal exercise. Subjects and Methods: Sixteen sedentary healthy Kuwaiti adult males were included in the study. The subjects were tested under thermo-neutral conditions during a spring-like month of Ramadan and 2 months thereafter. They were tested during the week before RF (Pre1); the last 3 days of RF (End1); the week before a non-Ramadan month (Pre2), and the last 3 days of the non-Ramadan month (End2). The following measurements were made: body composition, cellular and biochemical constituents of blood, heart rate, ventilatory responses and blood pressure. Results: No significant changes were observed in body composition, cellular and biochemical constituents of blood. The heart rate and ventilatory responses to the moderately intense bouts of submaximal aerobic exercise (∼70% of VO2max) were significantly reduced (p < 0.04) while systolic blood pressure increased (p < 0.05) by the end of RF. Conclusions: Ramadan fasting had no adverse effect on the subjects when performing aerobic exercise at submaximal level. The mild changes in cardiorespiratory responses could be due to dehydration, abstention from consumption of substances with negative inotropy and circadian rhythms.
© 2002 S. Karger AG, Basel
- Ramadan fasting
- Heart rate
- Oxygen consumption
- Blood pressure
- Body composition
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Dr. Jasem Ramadan
Department of Physiology
Faculty of Medicine, Kuwait University
PO Box 24923, 13110 Safat (Kuwait)
Tel. +965 5319593, Fax +965 5338937, E-Mail firstname.lastname@example.org
Received: Received: March 11, 2002
Revised: July 30, 2002
Number of Figures : 3, Number of Tables : 4, Number of References : 14
Medical Principles and Practice
International Journal of the Kuwait University Health Sciences Centre A Publicationof the Academic Publications Council
Vol. 11, No. Suppl. 2, Year 2002 (Cover Date: Released November 2002)
Journal Editor: Farida Al Awadi, Kuwait
ISSN: 1011–7571 (print), 1423–0151 (Online)
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