LONG-TERM UNILATERAL LOADING AND BONE-MINERAL DENSITY AND CONTENT IN FEMALE SQUASH PLAYERS
LONG-TERM UNILATERAL LOADING AND BONE-MINERAL DENSITY AND CONTENT IN FEMALE SQUASH PLAYERS
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DOI：
10.1007/bf00295946
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发表时间：
1994-04-01
影响因子：
4.2
通讯作者：
VUORI, I
中科院分区：
文献类型：
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作者：
HAAPASALO, H;KANNUS, P;VUORI, I
我们使用双能 X 射线吸收仪 (DXA) 扫描仪检查了 19 名芬兰国家级女壁球运动员和 19 名健康女性对照者，以确定长期单侧活动与上肢骨矿物质密度 (BMD) 和含量 (BMC) 之间的关联。在运动员中，比赛肢体各骨部位的 BMD 和 BMC 显着较高。肱骨近端的左右差异最大（BMD 15.6%，BMC 17.8%），尺骨干最小（BMD 5.6%，BMC 7.3%）。在性别、年龄、体重和身高匹配的对照组中，左右差异明显较小，范围为 1.6% 至 4.1%。训练年数和肘部屈曲强度与比赛手臂肱骨的相对 BMD 和 BMC 呈正相关（r = 0.632-0.685）。训练的起始年龄又与这些骨骼参数呈负相关（r = -0.483 至 -0.577）。在月经初潮之前或月经期间开始职业生涯的球员中，与在月经初潮后一年或更长时间开始训练的球员（9%）相比，双方之间的差异显着更大（平均 22%）。这些发现表明，运动肢体的骨骼明显受益于积极的壁球运动。肱骨的益处最大，前臂骨的益处较小。如果运动员在初潮时或初潮之前开始训练，那么运动的好处会比初潮之后更大。因此，体力活动似乎最能在儿童期和青春期增强骨矿化，此时骨量也会自然快速增加。
We examined 19 female Finnish national level squash players and 19 healthy female controls with a dual energy x-ray absorptiometric (DXA) scanner for the determination of the association between long-term unilateral activity and bone mineral density (BMD) and content (BMC) of the upper extremities. In players, the BMDs and the BMCs were significantly higher in each bone site of the playing extremity. The side-to-side difference was largest in the proximal humerus (BMD 15.6%, BMC 17.8%) and smallest in the ulnar shaft (BMD 5.6%, BMC 7.3%). In sex-, age-, weight-, and height-matched controls, the side-to-side differences were significantly smaller, ranging from 1.6% to 4.1%. The number of training years and elbow flexion strength correlated positively with the relative BMD and BMC in the humerus of the playing arm (r = 0.632-0.685). The starting age of training in turn correlated negatively (r = -0.483 to -0.577) with these bone parameters. Significantly larger side-to-side differences (average 22%) were found in players who had started their career before or during menarche than in those who had begun the training 1 year or more after the menarche (9%). These findings suggest that the bones of the playing extremity clearly benefit from active squash playing. The benefit is largest in humerus and smaller in the bone of the forearm. The benefit of playing is stronger if the athlete has started the training at or before menarche than after it. Thus, physical activity seems to best enhance bone mineralization at childhood and puberty, the time when the natural rapid increase in bone mass also occurs.