Coale Austin T, Pittman Stephanie C, Dorsey Coby B, Chowdry Farhan, Berkoff David J
University of North Carolina School of Medicine, 321 S Columbia St, Chapel Hill, NC, 27599, USA.
Department of Physical Medicine and Rehabilitation, University of Pittsburgh Medical Center, 3471 Fifth Ave, Pittsburgh, PA, 15213, USA.
J Ultrasound. 2025 Jun;28(2):413-420. doi: 10.1007/s40477-025-01007-w. Epub 2025 Mar 31.
The ability to identify muscle strain accurately is a critical aspect in managing exercise-induced muscle damage. Using differences in muscle stiffness as a proxy for muscle damage and recovery can better inform the decision to continue exercise versus pursue recovery.
HYPOTHESIS/PURPOSE: To identify changes in rotator cuff stiffness after a single bout of exercise as measured by ultrasound elastography.
10 healthy subjects, average age of 23.7, were enrolled in this prospective interventional trial. Each subject had a baseline scan then completed a standardized exercise program followed by another scan and daily evaluations until the results returned to within 10% of baseline.
Elastography measurements were collected around the infraspinatus tendon, and the deltoid was used as a baseline standard.
Summary statistics, t-test, and regression analysis were completed for the data.
Average strain was 0.5 at baseline, 0.7 immediately post-exercise, 0.6 on follow-up day 1, and 0.4 on follow-up day 2. There were statically significant differences between every timepoint. baseline-post 0.24, (p < 0.0001), post-day1 (decrease of 0.14, p < 0.0001), day1-day2 (decrease of 0.15, p < 0.0001), and BL-day2 (decrease of 0.05, p < 0.005).
These results demonstrate that the infraspinatus muscle stiffness increases immediately after exercise and takes up to 48 h to return to within 10% of baseline. We also found that at day 2 there continued to be an overcorrection with the infraspinatus remaining softer at this time point.
准确识别肌肉拉伤是管理运动引起的肌肉损伤的关键环节。利用肌肉僵硬度的差异作为肌肉损伤和恢复的指标，能够更好地为继续运动还是进行恢复的决策提供依据。
假设/目的：通过超声弹性成像确定单次运动后肩袖僵硬度的变化。
10名平均年龄为23.7岁的健康受试者参与了这项前瞻性干预试验。每位受试者进行一次基线扫描，然后完成一个标准化运动项目，之后再进行一次扫描以及每日评估，直至结果恢复到基线的10%以内。
在冈下肌腱周围收集弹性成像测量数据，并将三角肌作为基线标准。
对数据进行汇总统计、t检验和回归分析。
基线时平均应变率为0.5，运动后即刻为0.7，随访第1天为0.6，随访第2天为0.4。各时间点之间存在统计学显著差异。基线与运动后相比为0.24，（p < 0.0001），运动后与第1天相比（降低0.14，p < 0.0001），第1天与第2天相比（降低0.15，p < 0.0001），基线与第2天相比（降低0.05，p < 0.005）。
这些结果表明，冈下肌僵硬度在运动后即刻增加，需要长达48小时才能恢复到基线的10%以内。我们还发现，在第2天，冈下肌仍存在过度矫正，此时该肌肉仍较软。
