Detraining effects after sixteen weeks aerobic exercise on serum levels of Calcitonin and Parathyroid hormones in middle-aged women with osteopenia

  Physical activity is an important factor to increase or maintain mineral density in adults. The main purpose of this study was to investigate the effects of detraining after sixteen weeks aerobic exercise on serum levels of calcitonin and parathyroid hormone in middle-aged women with osteopenia. In the present semi-experimental study, sixteen inactive women referred to the Alborz Nuclear Medicine Center in Babol were selected. They were randomly divided into two groups of exercise and control. The aerobic training program was performed at 65-70% of the target heart rate for 16 weeks and three sessions per week. Also, detraining period was considered for 4 weeks. Serum calcitonin and parathyroid values were measured in ng/l. Statistical analysis was performed with SPSS software version 23 at a significant level (α = 0.05). Findings of our study indicate calcitonin hormone increment, parathyroid hormone reduction after 16 weeks aerobic training, calcitonin hormone reduction and Parathyroid hormone increment after a period of detraining. As a conclusion of our findings, the long-term physical activity with moderate intensity leads to favorable hormonal changes and then causes to balance bone metabolism and calcium regulation, and probably prevents osteopenia from becoming osteoporosis, on the other hand, detraining and decreased physical activity disrupt this positive setting