Behnaz Vanaky¹*, Heydar Sadeghi² and Nasrin Ramezani³

¹Master in Physical Education and Sports sciences, Faculty of physical Education and Sports Science, Central Tehran Branch, Islamic Azad University, Tehran, Iran. ²Full Professor, Faculty of physical Education and Sports Science, Khrazmi University Tehran, Iran. ³PHD Student in Sports Physiology, Faculty of physical Education and Sports Science, Tehran University,Tehran, Iran.

¹Master in Physical Education and Sports sciences, Faculty of physical Education and Sports Science, Central Tehran Branch, Islamic Azad University, Tehran, Iran. ²Full Professor, Faculty of physical Education and Sports Science, Khrazmi University Tehran, Iran. ³PHD Student in Sports Physiology, Faculty of physical Education and Sports Science, Tehran University,Tehran, Iran.

ABSTRACT: Osteoporosis is a bone disease common among women and it constitutes one of the dominate factors reducing quality of life and even shortening life. Physical activity and especially activity that increases muscles tension or loads on bones, helps to prevent the process of bone density loss. So the aim of the present study was to examine the effect of 12 week weight bearing water exercise program on bone mineral density in 50-70 years old women. The number of 20 women with the adage 50-75 years admitted in this study and randomized into water exercise group(n=10) and control group (n=10). The exercises group participated 12week in weight bearing water exercise program 3 times per weeks consist 10 minute warm up,20 minute weight bearing water exercise program and 10 minute active recovery .the period of each part increase gradually to 15 minute for warm up and recovery part and 45 minute for main part. While the control group was asked to do not engaged any physical activity and maintain their sedentary life. Bone density for all women was measured before and after the training program. Using the sample t- test (ad0.05) indicates that water exercised program have a positive effect on bone density in Comparison to the control group which showed a loss.

KEYWORDS: Osteoporosis; Bone density; Water exercise

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