Department of Physiotherapy, University of Seville, Avicena Street, 41009, Seville, Spain.
Faculty of Sport Sciences, Universidad Europea de Madrid, C/ Tajo s/n, Villaviciosa de Odón, 28670, Madrid, Spain.
Phys Ther Sport. 2020 May;43:181-187. doi: 10.1016/j.ptsp.2020.03.004. Epub 2020 Mar 18.
To analyze the prevalence of tendon pathology and performance associated in pre-professional classic dancers with no history of Achilles tendon (AT) pain.
A cross-sectional study was conducted.
Twenty-nine classic ballet dancers without AT pain (58 tendons) were recruited. The tendons were classified (normal, abnormal) using ultrasound imaging (USI). Cross-sectional area (CSA) and thickness of flexor hallucis longus (FHL) muscle were measured using USI. Range of movement (ROM) of the first metatarsophalangeal join, balance test, endurance test and vertical jump were measured (bilaterally) as performance variables.
More than a half (62%) of the participants had at least one abnormal tendon, with 45% of the dancers in the abnormal group having bilateral abnormalities. Dancers with AT pathology had significantly more years of dancing and number of weekly pointe hours than those with no pathology on US imaging. No significant differences between the groups were identified for the rest of the variables. Dancing years were moderately correlated with AT thickness.
Asymptomatic classic dancers had a high incidence of tendon pathology. Increased dancing years was associated with pathology in the AT. Nevertheless, these abnormalities may not affect dance performance.
分析无跟腱（AT）疼痛史的职业前古典舞者的肌腱病变和与运动表现相关的患病率。
横断面研究。
招募了 29 名无 AT 疼痛的古典芭蕾舞演员（58 个跟腱）。使用超声成像（USI）对肌腱进行分类（正常、异常）。使用 USI 测量踇长屈肌腱（FHL）的横截面积（CSA）和厚度。测量第一跖趾关节的活动范围（ROM）、平衡测试、耐力测试和垂直跳跃（双侧）作为运动表现变量。
超过一半（62%）的参与者至少有一条异常肌腱，异常组中有 45%的舞者存在双侧异常。在 US 成像上有 AT 病理的舞者的舞蹈年限和每周足尖小时数明显多于无病理的舞者。两组在其余变量上无显著差异。舞蹈年限与 AT 厚度中度相关。
无症状的古典舞者的肌腱病变发病率很高。增加的舞蹈年限与 AT 的病变有关。然而，这些异常可能不会影响舞蹈表现。
