Comparison of VO2max and some rest and exercise respiratory volumes and capacities during different menstrual phases

During reproduction age of women there are hormonal fluctuations which can influence some physical
performance. The purpose of present study was comparison of vo2max and some respiratory volumes and
capacities in 2nd day of menstruation and ovulation day during rest and after incremental exercise test.
Subjects of this study included 20 athlete girls (age: 21.31±2.65 year, height: 162.81±5.17 cm, weight:
54.83±4.72kg) which were selected voluntarily and objectively. Ovulation date was determined using
three methods of fulfilling related forms, body temperature and urinary samples. During 2nd day of
menstruation and ovulation day vo2max and respiratory volumes and capacities during rest and after
Bruce treadmill incremental test were measured. SPSS software and statistical method of paired t test was
used for analysis of data. Results of this study indicated no significant differences in VO2max and FEV1,
FEV/FVC, ERV and MVV during rest and after exercise in two phases. TV during rest and after exercise
in ovulation day was significantly higher than 2nd day of menstruation. In summary, in subjects of
present study there was no significant difference in VO2max and most of respiratory volumes and
capacities in two phases of menstruation, but higher TV was found during ovulation day compared to 2nd
day of menstruation.