Background and Objective: Bone Density (BD) decreases after menopause; on the other hand, physical activity is a major factor in preventing osteoporosis. The aim of this study was to determine the effects of six-month low-load very high-repetition resistance training (body pump) on BD and balance in postmenopausal women. Materials and Methods: 22 postmenopausal women from Sanandaj City voluntarily participated in the present study (mean age, height, weight and BMI=55. 2± 1. 7 yr, 160. 8± 3. 1 cm, 65. 1± 3. 5 kg and 25. 1± 1. 6 kg/m2), and were randomly divided into Resistance Training (RT; n=12) and Control (Con; n=10) groups. The RT performed 3 sessions in week for 6 months, while the control group did not have any regular exercise training during this period. Bone scans (dual energy X-ray absorptiometry) were performed at baseline and after 6 months of training. Also, the balance index was assessed using the Stork Balance Stand Test. Results: After 6 months, BD in the lumbar spine (P=0. 001) and balance (P=0. 001) significantly increased in the RT. In addition, there was significant differences in BD of lumbar spine between the RT and control (the lumbar spine: (P=0. 04), balance (P=0. 001)). But after 6 months, there were not any significant changes in femoral neck and forearm (P 0. 05) Conclusion: Six months, low-load very high-repetition resistance training increased the bone density of the lumbar spine while these changes did not occur at the femoral neck and forearm. It seems that the highest impact was on BD of the lumbar spine. Background and Objective: Bone Density (BD) decreases after menopause; on the other hand, physical activity is a major factor in preventing osteoporosis. The aim of this study was to determine the effects of six-month low-load very high-repetition resistance training (body pump) on BD and balance in postmenopausal women. Materials and Methods: 22 postmenopausal women from Sanandaj City voluntarily participated in the present study (mean age, height, weight and BMI=55. 2± 1. 7 yr, 160. 8± 3. 1 cm, 65. 1± 3. 5 kg and 25. 1± 1. 6 kg/m2), and were randomly divided into Resistance Training (RT; n=12) and Control (Con; n=10) groups. The RT performed 3 sessions in week for 6 months, while the control group did not have any regular exercise training during this period. Bone scans (dual energy X-ray absorptiometry) were performed at baseline and after 6 months of training. Also, the balance index was assessed using the Stork Balance Stand Test. Results: After 6 months, BD in the lumbar spine (P=0. 001) and balance (P=0. 001) significantly increased in the RT. In addition, there was significant differences in BD of lumbar spine between the RT and control (the lumbar spine: (P=0. 04), balance (P=0. 001)). But after 6 months, there were not any significant changes in femoral neck and forearm (P 0. 05) Conclusion: Six months, low-load very high-repetition resistance training increased the bone density of the lumbar spine while these changes did not occur at the femoral neck and forearm. It seems that the highest impact was on BD of the lumbar spine.