Aim: The purpose of this study was to determine the level of regular physical activity, isometric strength and anthropometric indices, which could be effective on BMD in young women.
Method: One hundred and sixty young females (aged 20.3±1.4 years height 160.3±5.1 cm and weight 55.1±7.9 kg; mean±SD) were selected as subjects and participated in this short-term study. The level of physical activity was determined by questionnaire. Isometric muscular strength of wrist, back and leg was measured by dynamometer and body composition was determined through BIA method.
Results: The results show that only 22.5 percent of subjects were active and the rest were in hypoactive and inactive groups. The results also show that there was a high relationship between the level of physical activity and wrist, back and leg strength (p<0.05). There was significant difference between wrist, back, and leg strength, lean body mass and body fat percent of groups regarding to the level of physical activity (p<0.01). Further analysis showed that lean body mass and muscular strength in the active group was significantly higher than in hypoactive and inactive groups (p<0.05).
Conclusion: The result of this study indicated that if active group compare to hypoactive, and inactive groups are in good physiological and anthropometrical condition, but the limitation of quantity of this group take into consider that, the risk factors in turn possibility of inflicting with osteoporosis was relatively high among female students. Therefore, the level of physical activity, and lifestyles of the female students should be improved.
Key words: Weight-bearing exercise, Physical activity, Muscular strength, Body composition