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American Journal of Clinical Nutrition, Vol 48, 110-116, Copyright © 1988 by The American Society for Clinical Nutrition, Inc

ORIGINAL RESEARCH COMMUNICATIONS

Riboflavin and thiamin status and birth outcome as a function of maternal aerobic exercise

RD Lewis, CY Yates and JA Driskell
Department of Human Nutrition and Foods, Virginia Polytechnic Institute and State University, Blacksburg 24061.

Twenty-eight healthy pregnant women taking vitamin-mineral supplements served as controls or participated in a walking program from 22 to 30 wk gestation to determine the effects of aerobic exercise on maternal riboflavin and thiamin status and birth outcome. Aerobic capacity was evaluated by heart rate (HR) and relative oxygen consumption (RVO2) during submaximal treadmill walking. HR responses at 30 wk gestation were significantly lower for walking (n = 18) than nonwalking (n = 10) groups at 2 and 4 min of exercise. RVO2 for walkers decreased significantly from 22 to 30 wk at 2, 4, and 6 min. Riboflavin and thiamin status, determined by erythrocyte glutathione reductase and transketolase activity coefficients, was adequate for 86 and 96% of the subjects, respectively. Birth-outcome measurements were similar for all subjects. Participation in the walking program slightly improved aerobic capacity without affecting riboflavin or thiamin status or birth outcome in pregnant women taking vitamin-mineral supplements.




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Copyright © 1988 by The American Society for Nutrition