Mohammad Hasan Khodkaran, Ali Hosseini and Ali Ghasemi
The aim of this research was to investigate effect of resistance training and intake of calcium and phosphorous on bone density of the nonathletic adolescents. For this purpose, 30 volunteer nonathletic adolescents with mean age of 17.60 ±0.3, weight of 61.31±5.95, height of 162.7±6.21 cm , BMI of 23.37±1.96 kg/m2 were randomly divided in three groups each including 10 people i.e. resistance exercise , resistance exercise and intake of calcium and phosphor and control group. The resistance exercise programs with intensity of 60 to 80% of a maximum repetition were performed for 8 weeks and 3 days per week. The blood samples of each group of subjects were taken separately before and after completion of the resistance exercise protocol and resistance exercise with intake of supplement for measurement of indices of bone density , Osteocalcin, parathyroid , Alkaline phosphatase, calcium and phosphor in specialized laboratory. Statistical analysis was done with dependent t-test for intragroup changes and one-way ANOVA test was performed to study difference between groups in alpha level of 0.05. Results of this research in the resistance exercise group and resistance exercise group with supplement intake showed significant increase in levels of osteocalcin, parathyroid, alkaline phosphatase, calcium and phosphor and this increase in the resistance exercise group with calcium and phosphor supplement intake was higher than that in resistance exercise group. Therefore, based on results of this research, it can be mentioned that intake of calcium and phosphor supplement along with resistance exercise led to more increase of osteocalcin, parathyroid, alkaline phosphatase, calcium and phosphor of the body compared with the resistance exercise alone.
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