متن چکیده : Introduction: Osteoporosis is a systemic skeletal disease that is characterized by a decrease in bone density and, as a result, an increase in bone fragility and susceptibility to fracture, especially in the spine and the head of the femur, which is a type of spongy bone, and as a result of imbalance It happens between bone absorption and resorption. The results of the studies showed that exercise in water, due to the pressure it does not put on the bones and the effect of weightlessness, stimulates the osteoblasts and imposes the necessary resistance on the body to suit the needs of each person, and insufficient intake Vitamin D can contribute to the prevalence of osteoporosis, so the purpose of this study was to investigate the effect of 8 weeks of exercise in water along with vitamin D consumption on bone density in elderly men. Methods and Materials: The current semi-experimental research was conducted on 30 men with an age range of 50-65 years, who were randomly divided into two supplement+exercise groups (15 people) and exercise group (15 people). The exercise+supplement group did 3 sessions of water exercise every week for 8 weeks with an intensity of 65-70% of the reserve heart rate and received 600 IU of vitamin D three days a week, and the exercise group only did physical exercises. Mineral density of subjects" femurs was measured before and after 8 weeks by Dexa bone densitometer. Experiment and data analysis was done using independent t-test by SPSS software. Results: Femur bone density in the water and vitamin D training group showed a significant difference compared to the training group (p=0.002). Conclusion: The findings show that weight bearing exercises and vitamin D consumption in elderly men prevent age-related bone density loss. Keywords: exercise in water, vitamin D, elderly men, bone de
