1997 Fiscal Year Final Research Report Summary
Clinical and Experimental Studies for the Effects of Exercise and Food Restriction on Basal Metabolic Rate and Bone Metabolism
| Project/Area Number |
07680152
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
体育学
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| Research Institution | Saitama College of Health |
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Principal Investigator |
SATO Yuji Department of General Education, Saitama College of Health, 一般教養, 助教授 (10196280)
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| Co-Investigator(Kenkyū-buntansha) |
OKANO Goroh Laboratory of Physiology in Exercise and Nutrition, Department of Exercise Scien, 医学部, 助教授 (50117610)
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| Project Period (FY) |
1995 – 1997
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| Keywords | female athletes / EAT-26 / disordered eating patterns / menstrual irregularities / food restriction / endurance exercise / resting metabolic rate / bone metabolism |
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| Research Abstract |
At first, we investigated the desire and its reasons for weight loss, the prevalence od disordered eating patterns (DEP) and menstrual status, by using written questionaires and Eating Attitude Test-26 (EAT-26), in Japanese female athletes (n= 1000) and nonathletic controls (n=593). In the categories of endurance I (athletes competing in sports where leanness is considered important) and aesthetic groups, the prevalence of DEP and amenorrhea were significantly higher than in the nonathletic controls. These data indicate a significantly higher prevalence of DEP and menstrual dysfunction in the athletes involved in sports where leanness is emphasized, and a close relationship among undernutrition, low body weight and menstrual dysfunction.
In contrast, in Chinese female athletes, the prevalence of DEP is low (technical 1.5%, endurance I 3.3%, endurance II (athletes competing in sports where leanness is considered less important) 1.6%, aesthetic 3.0%, ball-game 3.0% and power sports 0.9%), and did not differ from that in nonathletic controls (0.7%). The prevalence rates of amenorrhea was also low both in athletes and nonathletes. It was suggested that a low prevalence of DEP in Chinese athletes stems from low socioculturally- and socioeconomically-imposed desires to be thin and low requirements for weight loss to improve athletic performance.
Thirdly, we investigated the effects of endurance exercise and food restriction (70%) on the resting metabolic rate and bone metabolism in young female rats. Voluntary running exercise concurrent with food restriction increased serum lipid levels and estradiol concentration. Resting O_2 uptake was not different among both exercise and non-exercise groups and control and restricted groups : Unfortunately, we could not examined bone mineral.
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