Int. J. Biosci.3(10), 203-211, October 2013
Sports and physical activity are considered as synthesis stimulator and bone density maintainer. Activity through accumulation of minerals, muscle improvement, and individual’s balance improvement result in less bone fracture. People, who start physical activities before maturity, tend to increase the mineral contents and diameter bone growth. The current study aims to compare bone mineral density (BMD) in total body bones of elite athletes in athletics. The examinees of this comparative-scientific research consist of 30 male elite athletes of age 20 to 30 years old, involved in endurance, throwing and jumping. These examinees had championship titles and they were active in Iran athletics league. The BMD of total body bones were measured by DEXA method, and the data were compared by the UNIVARIATE ANOVA (P≤ 0.05). Data analysis showed that no significant difference exists in examinees’ total body bone mineral density in different types of athletics (P=0.124). But BMD in throwers’ hand bones was more than two other groups (p=0.002). Also BMD in jumpers’ ribs, spine, pelvis and legs was more than the throwers and runners (p=0.001). Based on the non-significant difference of athletics athletes’ total body bone minerals it could be concluded that all three types of athletics have positive effect on the total body bones. Possibly the higher BMD of hand in throwing type is due to the more effect of exercise pressure compared to running and jumping types. Jumpers have more BMD in rib, pelvis, leg, and spine bones, because jumping is considered as one of the strengthening exercises. On the other hand explosive movements in jumpers are more than two other groups, which put more pressure on the pelvis, rib, leg, and spine bones.
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