The effect of 12 weeks of circular resistance training on markers of bone metabolic and hormonal in elderly men

The aim of this study was to investigateto the effect of 12 weeks of resistance circuit-based training on markers of bone metabolic and hormonal in elderly men.30 elderly men with mean and standard deviation of age: 67.63 ± 4.82 years; weight: 75.82 ± 8.89 kg and body mass index: 27.53±3.28 kg/m2 were randomly divided into two groups of combined training and control. The resistance exercise training was performed at 30–55% ofthe one-repetition maximum (1-RM), three times per week for 12-weeks, while the CON group maintained their regular lifestyle. The hormonal and bone metabolic markers including serum 25-(OH) D3,parathyroid hormone (PTH), osteocalcin (OC), alkaline phosphatase (ALP), calcitonin and calcium were measuredbefore training and after 12weeksexercise intervention. The results of analysis of covariance showed a significant increase in the calcitonin levels (14.80± 2.70) vs. 12.67± 3.75 ml/dl, p = 0.037) and calcium (9.70±0.65 vs. 9.09±0.47 ml/dl, p = 0.006) in the resistance training group compared to the control group showed intervention after 12 weeks.The findings of the present study showed that 12 weeks of resistance circuit-based training led to a significant improvement in some hormonal markers and bone metabolic in the elderly. Further studies with a long-term follow-up should be considered to confirm these findings.