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JOURNAL
OF
SPORTS SCIENCE &
MEDICINE
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Research
article
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EFFECTS OF THE MENSTRUAL CYCLE ON EXPIRATORY RESISTANCE DURING WHOLE BODY EXERCISE IN FEMALES |
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Alethea J. Anderson and Mark A. Babcock 
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Department of Kinesiology and Physical Education, Wilfrid Laurier University, Waterloo, ON. Canada |
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© Journal of Sports Science and Medicine (2008) 7, 475 - 479 Search Google Scholar for Citing Articles |
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| ABSTRACT | |||
| Our objective was to determine if the menstrual cycle affected
expiratory resistance developed during progressive incremental exercise
in females. Eleven females (age = 19.7 ± 1.1 yr., body mass = 58.9 ± 8.8
Kg, height = 1.65 ± 0.3 m) gave consent to participate in the study. Participants
were studied during the follicular (day 7 ± 2 days following onset of menses)
and luteal (day 21 ± 2 days following onset of menses) phases of their menstrual
cycle. The expiratory resistance was significantly higher during the follicular
phase at maximal workload versus the luteal phase (1.0 ± 0.06 cm H2O/L/sec
vs. 0.9 ± 0.07 cm H2O/L/sec.: p< 0.05). No other differences
were found in expiratory resistance, oxygen uptake or maximal heart rate
during exercise. Results showed that the increase in expiratory resistance
during the follicular phase of the menstrual cycle may be contributing to
the changes in the pulmonary system of females as reported by other authors.
Key words: airway resistance, female, menstrual cycle, exercise. |
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