Development of a Weight Control Program According to Phases of the Menstrual Cycle
【Supercategory：7. DESCENTE SPORTS SCIENCE Subcategory：7.38 Vol.38】
ABSTRACT
The body composition and weight control are very important for athlete's conditioning and performance improvement. The ovarian hormones could effect on fluid retention. Therefore, it has been suggested the body weight and the body composition should be changed in the phase of menstrual cycle. The present study aimed to develop a weight control program according to the phases of the menstrual cycle based on a study of eight eumenorrheic women (age, 21.6±0.4years; height, 161.3±1.8cm) who volunteered to participate in this study. All participants cycled for 30 min at an intensity of 60% VO₂peak. Blood samples were collected and respiratory gas was analyzed at rest (0min) and at 30, 60, and 90min after exercise during the follicular (FP), ovulation (OV), and luteal (LP) phases of one menstrual cycle. Blood levels of ovarian hormones (estradiol and progesterone), catecholamines (adrenalin and noradrenalin), glucose, free fatty acid (FFA), renin activity, and aldosterone were assessed. Blood concentrations of estradiol were haigher greater during the OV and LP than during the FP at all time points. Body weight tended to increase during the LP compared with the OV (p=0.06).Renin activity significantly and positively correlated with progesterone (r=0.632, p<0.01). The noradrenaline was significantly higher in the luteal phase than in the follicular phase. In conclusion, the increase in body weight during the LP was induced by an increase in body fluid volume. However, aerobic exercise performed during the luteal phase might reduce body fat.
DESCENTE SPORTS SCIENCE Vol.38/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE
The body composition and weight control are very important for athlete's conditioning and performance improvement. The ovarian hormones could effect on fluid retention. Therefore, it has been suggested the body weight and the body composition should be changed in the phase of menstrual cycle. The present study aimed to develop a weight control program according to the phases of the menstrual cycle based on a study of eight eumenorrheic women (age, 21.6±0.4years; height, 161.3±1.8cm) who volunteered to participate in this study. All participants cycled for 30 min at an intensity of 60% VO₂peak. Blood samples were collected and respiratory gas was analyzed at rest (0min) and at 30, 60, and 90min after exercise during the follicular (FP), ovulation (OV), and luteal (LP) phases of one menstrual cycle. Blood levels of ovarian hormones (estradiol and progesterone), catecholamines (adrenalin and noradrenalin), glucose, free fatty acid (FFA), renin activity, and aldosterone were assessed. Blood concentrations of estradiol were haigher greater during the OV and LP than during the FP at all time points. Body weight tended to increase during the LP compared with the OV (p=0.06).Renin activity significantly and positively correlated with progesterone (r=0.632, p<0.01). The noradrenaline was significantly higher in the luteal phase than in the follicular phase. In conclusion, the increase in body weight during the LP was induced by an increase in body fluid volume. However, aerobic exercise performed during the luteal phase might reduce body fat.
DESCENTE SPORTS SCIENCE Vol.38/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE
| Researcher | Mikako Sunaga*1, Kayoko Kamemoto*2, Miduki Yamada*3 |
|---|---|
| University or institution | *1 Department of Exercise Physiology, Nippon Sport Science University, *2 Teikyo University Institute of Sports Science & Medicine, Teikyo University, *3 Graduate School of Health and Sport Science, Nippon Sport Science University |
Keywords
menstrual cycle, body weight, body composition, fluid retention, renin activity