Sweileh N, Schnitzler A, Hunter G R, Davis B
Department of Health Education and Physical Education, University of Alabama, Birmingham.
J Sports Med Phys Fitness. 1992 Jun;32(2):156-63.
Muslims abstain from food and drink from dawn to sunset during Ramadam, the ninth month of the Islamic calendar. The purpose of this study was to examine the changes that occurred in body composition and both resting and exercise metabolism during a 4 week Ramadan fast. Subjects consumed an average of 1220 kcal each day during Ramadan and lost a significant 1.92 kg body weight. The subjects also lost 2.8% fat. Fat-free mass did not change. Serum sodium, chloride, and protein increased during the first week of Ramadan and returned to the pre-fasting levels during the last week. This indicates a state of dehydratation existed during the first week of Ramadan. Consistent with this is first week 1.13 kg body weight loss with no change in percent fat. First week Ramadan tests showed a significant decrease in VO2max with a return to the pre-test levels in the last week. The lower resting afternoon VO2 suggests that during Ramadan the body's metabolism slows down during the day in order to conserve its energy stores, however, exercise economy as measured by submaximal VO2 in mk/kg/min is not affected.
在伊斯兰教历的第九个月斋月期间，穆斯林从黎明到日落禁食禁饮。本研究的目的是调查在为期4周的斋月禁食期间身体成分以及静息代谢和运动代谢所发生的变化。在斋月期间，受试者平均每天摄入1220千卡热量，体重显著减轻了1.92千克。受试者的脂肪也减少了2.8%。去脂体重没有变化。斋月第一周血清钠、氯和蛋白质水平升高，最后一周恢复到禁食前水平。这表明斋月第一周存在脱水状态。与此一致的是，第一周体重减轻了1.13千克，而体脂百分比没有变化。斋月第一周的测试显示最大摄氧量显著下降，最后一周恢复到测试前水平。较低的下午静息最大摄氧量表明，在斋月期间，身体的新陈代谢在白天会减慢，以保存能量储备，然而，以每千克体重每分钟毫升数表示的次最大摄氧量所衡量的运动经济性并未受到影响。
