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Risk Factors

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Does Fasting during Ramadan Alter Body Composition, Blood Constituents and Physical Performance?

Ramadan J.

Author affiliations

Department of Physiology, Faculty of Medicine, Kuwait University, Kuwait

Corresponding Author

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 ramadan@hsc.kuniv.edu.kw

Related Articles for ""

Med Principles Pract 2002;11(suppl 2):41–46

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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

Article / Publication Details

First-Page Preview
Abstract of Risk Factors

Received: March 11, 2002
Accepted: July 30, 2002
Published online: November 27, 2002
Issue release date: November 2002

Number of Print Pages: 6
Number of Figures: 3
Number of Tables: 4

ISSN: 1011-7571 (Print)
eISSN: 1423-0151 (Online)

For additional information: http://www.karger.com/MPP

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