Fleckenstein J L, Weatherall P T, Parkey R W, Payne J A, Peshock R M
Department of Radiology, University of Texas Southwestern Medical Center, Dallas 75235-9085.
Radiology. 1989 Sep;172(3):793-8. doi: 10.1148/radiology.172.3.2772190.
Sports-related muscle pain is frequent in both trained and untrained persons; however, its severity and significance may be difficult to assess clinically. The authors used magnetic resonance (MR) imaging to evaluate acute strains and delayed-onset muscle soreness in sedentary subjects and postmarathon myalgia in trained runners. MR imaging documented the distribution of affected muscles and the absence of focal hematoma, fascial herniation, subsequent fibrosis, and fatty infiltration. Pain associated with strain and that occurring several days after exercise were both associated with prolongation of muscle T1 and T2. In a prospective evaluation of delayed-onset muscle soreness, abnormalities depicted at MR imaging persisted longer than symptoms by up to 3 weeks, indicating that MR imaging is sensitive to tissue alteration that is not apparent clinically. Highly trained marathon runners tended to have relatively mild abnormalities involving the myotendinous junctions.
与运动相关的肌肉疼痛在训练有素和未经训练的人群中都很常见；然而，其严重程度和意义在临床上可能难以评估。作者使用磁共振（MR）成像来评估久坐不动的受试者的急性拉伤和延迟性肌肉酸痛，以及训练有素的跑步者的马拉松赛后肌痛。MR成像记录了受影响肌肉的分布情况，以及是否存在局灶性血肿、筋膜疝、随后的纤维化和脂肪浸润。与拉伤相关的疼痛以及运动几天后出现的疼痛均与肌肉T1和T2延长有关。在对延迟性肌肉酸痛的前瞻性评估中，MR成像显示的异常比症状持续的时间长，最长可达3周，这表明MR成像对临床上不明显的组织改变很敏感。训练有素的马拉松运动员往往有相对较轻的涉及肌腱结合处的异常。
