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首页> 外文期刊>Journal of strength and conditioning research >Effect of strength training and the practice of Alpine skiing on bone mass density, growth, body composition, and the strength and power of the legs of adolescent skiers.
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Effect of strength training and the practice of Alpine skiing on bone mass density, growth, body composition, and the strength and power of the legs of adolescent skiers.

机译：力量训练和高山滑雪练习对青少年滑雪者的骨密度，生长，身体成分以及腿部力量和力量的影响。

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摘要

This work examines the influence of practicing strength training and Alpine skiing over 2 years on bone mineral density (BMD), growth, body composition, and the strength and power of the legs of adolescent skiers. The study subjects were 20 adolescent skiers (10 girls and 10 boys) and 19 sedentary adolescents (9 girls and 10 boys), all 13-16 years of age. The BMDs of the lumbar column (L2-L4) and hip (neck of the femur, trochanter, and Ward's triangle) were determined by dual x-ray photon absorptiometry at the beginning and end of the experimental period. The increase in height and the percentage fat and muscular masses of the subjects were also recorded, as was their ability to jump (countermovement jump [CMJ]), their leg strength and power (squat test), and their leg anaerobic power (continuous jump test [CMJ15'']). No significant differences were seen in the increase in height, body weight, or percentage fat mass between the skiers and sedentary subjects, although the boy skiers showed a significant increase in percentage muscular mass (p < 0.05) compared to the sedentary boys. The improvement in the values of the different CMJ variables was significantly greater among the boy skiers than among the sedentary boys (p < 0.001-0.01). The same was true for the girls (p < 0.001), except for CMJ15''. The skiers experienced a significantly greater increase in L2-L4 BMD than the sedentary subjects (boys p < 0.05; girls p < 0.01). These results suggest that Alpine skiing combined with rational strength training involves no special risk for the physical development of young people, has a positive effect on the power and the percentage of muscle mass in the legs, and helps to have a higher bone density in the lumbar spine (L2-L4).
机译：这项工作研究了进行两年的力量训练和高山滑雪对青少年滑雪者的骨矿物质密度（BMD），生长，身体成分以及双腿力量和力量的影响。研究对象为20至13岁的青少年滑雪者（10名女孩和10名男孩）和19名久坐的青少年（9名女孩和10名男孩）。在实验期间的开始和结束时，通过双X射线光子吸收法测定腰柱（L2-L4）和臀部（股骨，转子和沃德三角）的BMD。还记录了受试者的身高，脂肪和肌肉质量百分比的增加，以及他们的跳跃能力（反运动跳跃[CMJ]），腿部力量和力量（下蹲测试）以及腿部无氧运动能力（连续跳跃）测试[CMJ15'']）。滑雪者和久坐的受试者之间在身高，体重或脂肪质量百分比上的增加没有显着差异，尽管与久坐的男孩相比，男孩滑雪者的肌肉质量百分比显着增加（p <0.05）。在男孩滑雪者中，不同CMJ变量值的改善明显比在久坐的男孩中更大（p <0.001-0.01）。除CMJ15外，女孩的情况也是如此（p <0.001）。''滑雪者的L2-L4骨密度明显高于久坐者（男孩P <0.05;女孩P <0.01）。这些结果表明，高山滑雪与合理的力量训练相结合不会对年轻人的身体发育造成特别的风险，对腿部力量和肌肉质量百分比具有积极影响，并有助于提高骨骼的密度。腰椎（L2-L4）。

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