J Orthop Sports Phys Ther. 2020 Jul;50(7):381-387. doi: 10.2519/jospt.2020.9183.
To investigate change in shoulder rotation strength from preseason to midseason during a competitive season in youth elite handball players without shoulder problems.
Prospective cohort study.
Players (n = 292, 45% female, 14-18 years of age) without shoulder problems from Danish youth elite handball clubs were assessed in the preseason and midseason. We measured isometric shoulder strength using handheld dynamometry in internal rotation (IR) and external rotation (ER) in supine, with the shoulder abducted 90° in neutral rotation and in 30° of IR. The primary outcome was the change in corresponding ER/IR ratio.
The mean ER/IR ratios increased from preseason to midseason in neutral rotation (male player difference, 0.02; 95% confidence interval [CI]: -0.01, 0.06; female player difference, 0.05; 95% CI: 0.01, 0.09) and in 30° of IR (male player difference, 0.15; 95% CI: 0.11, 0.20; female player difference, 0.12; 95% CI: 0.07, 0.17). The change in ER/IR ratio may be explained by an increase in ER strength in female players and a decrease in IR strength in male players. The amount of change in ER/IR ratio over the season was greater than individual measurement error metrics for 45% to 66% of the players.
Shoulder rotation strength ratios changed during a competitive season in Danish youth elite handball players. .
研究无肩部问题的青年精英手球运动员在竞争赛季中从 preseason 到 midseason 期间肩部旋转力量的变化。
前瞻性队列研究。
来自丹麦青年精英手球俱乐部的无肩部问题的球员（n = 292，45%为女性，年龄 14-18 岁）在 preseason 和 midseason 进行评估。我们使用手持式测力计测量仰卧位时的肩部内旋（IR）和外旋（ER）的等长肩部力量，肩部在中立旋转和 30°的 IR 下外展 90°。主要结果是 ER/IR 比值的变化。
在中立旋转（男性球员差异，0.02；95%置信区间 [CI]：-0.01，0.06；女性球员差异，0.05；95% CI：0.01，0.09）和 30°的 IR（男性球员差异，0.15；95% CI：0.11，0.20；女性球员差异，0.12；95% CI：0.07，0.17）中，ER/IR 比值从 preseason 到 midseason 增加。ER/IR 比值的变化可能是由于女性球员 ER 力量的增加和男性球员 IR 力量的减少所致。在整个赛季中，ER/IR 比值的变化量大于 45%至 66%的球员个体测量误差指标。
丹麦青年精英手球运动员在竞争赛季中肩部旋转力量比值发生变化。
