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Journal of Exercise Nutrition & Biochemistry 2003;7(2):197-208.
Articles : Muscular Strength According to Age and Its Relationship to Anthropometry, Protein Nutrition, Exercise Habits in Sedentary Adult Women
Abstract
R
eduction of muscle mass with ageing, which is known as sarcopenia, results in a reduced muscular strength. Muscle strength decline causes a rapid decline of physical function and reduction of energy expenditure with ageing. However, little reports investigated the change of muscular strength in Korean adult females by life cycles and its association with multi-facts. In this study, the muscle strength were measured in young adult, middle-aged and elderly, respectively, and its association with protein nutritional state, exercise habits, and anthropometric condition. As muscular strength indicators, the hand grip strength and back muscle strength were used. The proportion of low muscle strength group, whose hand grip strength were under 15 kg, was the highest in the elderly and the lowest in the middle-age. Therefore, the mean hand grasping power and back muscular strength were decreased in the elderly. The hand grip strength showed positive associations with height, fat-free mass, but negative correlations with %body fat, waist circumference, WHR. Back muscular strength showed positive correlations with heightm, fat-free mass, and TSF, but negative correlation with %bofy fat, WHR. The hand grip and back muscular strength showed also positive correlations with serum albumin level and protein intake, respectively. No correlation could be found between muscular strength and exercise habits. The hand grasping power can be explained to about 30.4% by age, fat-free mass, and exercise time The fat-free mass and protein intake explained the variances of the back muscular strength by 18.9%. This study indicated that age, protein nutritional state, fat-free mass, and exercise can affect the muscular strength in healthy sedentary adult females.
Key Words: muscular strength, adult females, protein nutrition, anthropometry, exercise habits


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