Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
ISSN: 1303 - 2968   
Ios-APP Journal of Sports Science and Medicine
Androit-APP Journal of Sports Science and Medicine
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©Journal of Sports Science and Medicine (2020) 19, 556 - 563

Research article
Effects of Menstrual Cycle Phase on Fluid Regulation during Walking Exercise
Yuka Nose1, , Kana Fujita2, Takuma Wada3, Kazuki Nishimura4, Masayuki Hakoda1
Author Information
1 Department of Nutritional Sciences, Yasuda Women’s University, Hiroshima City, Japan
2 Department of Food and Nutrition, Sonoda Women’s University, Amagasaki City, Japan
3 Department of Health and Sports Science, Kawasaki University of Medical Welfare, Kurashiki City, Japan
4 Department of Global Environment Studies, Hiroshima Institute of Technology, Hiroshima City, Japan

Yuka Nose
✉ Department of Nutritional Sciences, Faculty of Human Ecology, Yasuda Women’s University, 731-0153, Yasuhigashi 6-13-1, Asaminami-ku, Hiroshima, Japan
Email: nose@yasuda-u.ac.jp
Publish Date
Received: 06-04-2020
Accepted: 19-06-2020
Published (online): 13-08-2020
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ABSTRACT

To elucidate the fluid regulation in different menstrual cycle phases during exercise. Sex hormones affect fluid regulation in different ways. Moreover, the renin angiotensin-aldosterone system is activated in the luteal phase in rest. However, there are limited studies on fluid regulation affected by such hormone excretion in the menstrual cycle during exercise, especially during a light walking exercise. A non-invasive method using urine samples to determine menstrual cycle phases was used, and the follicular and luteal phases were successfully confirmed in 10 participants (age, 21 ± 1 years; body mass index, 20.5 ± 2.1 kg/m2). The experimental exercise sessions consisted of 5-min standing and 15-min walking at 2 km/h on 15% slope (approximately 8.3°) on a treadmill. Each participant carried a backpack weighing 5% of her own weight, and performed three sessions of walking exercise. Urine aldosterone excretion was significantly higher in the luteal than in the follicular phase before and after walking (p < 0.05). Urinary excretion of aldosterone was five times higher in the luteal than in the follicular phase before and after walking exercise. Heart rates during walking, after rest, and after recovery were all significantly higher in the luteal than in the follicular phase (p < 0.05). The participants’ ratings of perceived exertion during the first and third session of walking in the luteal phase was not higher than that at the follicular phase. The results of our study suggested that increased activity of the renin-angiotensin-aldosterone system in the luteal phase of the menstrual cycle might be further activated during exercise. This may increase the circulatory load, which is reflected as increased heart rate. These results suggested that premenopausal women may better take into account a possibility of an increased circulatory load in the luteal phase even when they perform light exercise.

Key words: Menstrual cycle, exercise, luteal phase, heart rate


           Key Points
  • Heart rates during walking, after rest, and after recovery were all significantly higher in the luteal than in the follicular phase.
  • Activity of the renin-angiotensin-aldosterone system in luteal phase increase the circulatory load, which is reflected as increased heart rate.
  • Increased activity of the renin-angiotensin-aldosterone system in the luteal phase of the menstrual cycle might be further activated during exercise.
  • Our results suggested that premenopausal women may had better take into account a possibility of an increased circulatory load in the luteal phase even when they perform light exercise.
 
 
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