Effects of long-term tennis playing on the muscle-bone relationship in the dominant and nondominant forearms
Effects of long-term tennis playing on the muscle-bone relationship in the dominant and nondominant forearms
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DOI：
10.1139/h05-101
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发表时间：
2005-02-01
期刊：
影响因子：
--
通讯作者：
Courteix, D
中科院分区：
文献类型：
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作者：
Ducher, G;Jaffré, C;Courteix, D
肌肉力量与骨密度之间的关系说明了机械负荷对骨骼的积极作用。但局部和全身因素可能会同时影响肌肉和骨组织。本研究探讨了长期打网球对前臂瘦组织质量与骨矿含量关系的影响，同时考虑了人体尺寸。对52名网球运动员(年龄24.2+/-5.8岁，训练162+/-6.1岁)进行DXA全身扫描，测量前臂瘦组织质量(LTM)、骨面积、骨矿含量(BMC)和骨密度。用测力计评估握力，发现在所有参数中，明显的两侧差异(p<；0.0001)有利于优势前臂。双侧骨面积、骨密度与握力呈正相关(r=0.0001.81~0.84，P<0.0 5)。在调整全身骨矿含量、身高或前臂长度后，相关性仍然显著。这一结果强化了肌肉在骨骼机械负荷中的假定作用。此外，优势侧调整为LTM或握力的前臂BMC较高，表明网球比赛对骨骼有直接影响。
The relationship between muscle strength and bone mineral density illustrates the positive effect of mechanical loading on bone. But local and systemic factors may affect both muscle and bone tissues. This study investigated the effects of long-term tennis playing on the relationship between lean tissue mass and bone mineral content in the forearms, taking the body dimensions into account. Fifty-two tennis players (age 24.2 +/- 5.8 yrs, 162 +/- 6.1 yrs of practice) were recruited Lean tissue mass (LTM), bone area, bone mineral content (BMC) and bone mineral density were measured at the forearms from a DXA whole-body scan. Grip strength was assessed with a dynamometer A marked side-to-side difference (p < 0.0001) was found in favor of the dominant forearm in all parameters. Bone area and BMC correlated with grip strength on both sides (r = 0.81-0.84, p < 0.0001). The correlations were still significant after adjusting for whole-body BMC, body height, or forearm length. This result reinforced the putative role of the muscles in the mechanical loading on bones. In addition, forearm BMC adjusted to LTM or grip strength was higher on the dominant side, suggesting that tennis playing exerts a direct effect on bone.