الفهرس 
Title : Response of parathyroid hormone and blood calcium level to moderate intensity aerobic exercise in elderly
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Abstract
Background: One of the main aging biological changes is bone deterioration which affected more by estrogen deficiency in elderly women, Parathyroid hormone is one of the osteoporotic indices and a major regulator of bone metabolism and calcium homeostasis, the objective is to determine the response of parathyroid hormone and total calcium level to moderate aerobic training in elderly. Methods: Thirty-five female subjects were selected from out-patient clinic in Um El-Masryeen General Hospital /Giza/Egypt, their age ranged between 60 to 70 years with mean age is 64.45, and study was conducted between October 2017 and April 2018. All subjects had participated in moderate intensity aerobic training calculated as 60% to 70% of their predetermined maximum heart rate. The program was applied for three times per week for 12 weeks. Parathyroid hormone and calcium level were measured before and after the training program in laboratory analysis. Results: Statistical analysis showed a significant decrease in parathyroid hormone by 5.98% and a significant increase in total calcium level in the blood by 0.44%. Conclusion: It was concluded that moderate aerobic training decreases parathyroid hormone and increase total calcium serum level in elderly