The Effect of Menstrual Cycle and Submaximal Exercise on Acute Body Composition Estimates from Bioelectrical Impedance
The purpose of this study was to investigate changes in percent body fat (BF%) estimates through bioelectrical impedance analysis (BIA) before and after moderate intensity exercise during the follicular and luteal phases of the menstrual cycle. Ten healthy eumenorrheic female subjects performed 45 min of exercise during the follicular phase and during the luteal phase of their menstrual cycle. BIA estimates of BF% and total body water were examined immediately before exercise and 30 minutes after the end of exercise, without fluid replacement. The results indicated no significant effects of exercise (p = 0.170) or menstrual phase (p = 0.688) on BF%. These results suggest that neither menstrual cycle nor acute exercise needs to be considered when using BIA to estimate BF% in moderately exercising women.
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30 minutes 45 minutes ANOVA BIA estimates Bickers and Woods Bioelectrical Impedance Analysis blood flow body composition estimates body fat percentage body mass changes in BIA current study cycle ergometer decrease in BF dehydrating exercise Demura Deurenberg DEXA effect of exercise effect of menstrual electrodes electrolyte ergometer estimate FFM estimated body fat estimated by BIA estimated through BIA exercise and menstrual exercise on BF exercise session exercise trials fat mass fluid replacement follicular phase galvanic skin response Gleichauf and Roe higher BF hydration hydrodensitometry increase in TBW Kyle lower BF luteal and follicular luteal phase McKee and Cameron menstrual cycle phase moderate exercise O’brien osmolality participants perceived exertion post-exercise progesterone rating of perceived recreationally active research study resistance Segal significant effect standard deviations submaximal exercise supine position technique total body water trend UNC-Chapel Hill urine specific gravity USG values water retention weight loss women workload