摘要：Williams JS, Parsons, SM. Ventilatory and Respiratory Muscle Function at Rest and During Exercise Across the Menstrual Cycle. JEPonline 2011;14(5):109-117. The purpose of this study was to compare ventilatory responses and inspiratory muscle strength at rest and during incremental exercise during the follicular and luteal phases of the menstrual cycle. Subjects were healthy females (18 to 25 yrs) with a normal menstrual cycle during the 4 months prior to the study. None was using birth control medication. Standard pulmonary function testing was performed followed by a graded exercise test (GXT) to assess ventilatory responses to exercise. All subjects performed a maximal inspiratory pressure (MIP) maneuver to assess inspiratory muscle strength before and immediately following the GXT. Spirometric flow rates and capacities were not significantly different (P>0.05) between the follicular and luteal phases. There were no significant differences (P>0.05) in resting, submaximal, or maximal ventilation (VE, VE/VO2, and VE/VCO2) across the menstrual cycle. No significant differences within or between conditions (P>0.05) were found in MIP before and after exercise. These results indicate that the menstrual cycle phase had no influence on the subjects’ ventilatory responses at rest, during submaximal exercise or maximal exercise. Additionally, there were no differences in inspiratory muscle strength at rest or following exercise between the follicular and luteal phases of the menstrual cycle.
