Human Performance Laboratory, Department of Kinesiology, Doctor of Physical Therapy Program, University of Connecticut, Storrs, Connecticut.
J Strength Cond Res. 2018 Nov;32(11):3070-3079. doi: 10.1519/JSC.0000000000002386.
Lepley, AS, Joseph, MF, Daigle, NR, Digiacomo, JE, Galer, J, Rock, E, Rosier, SB, and Sureja, PB. Sex differences in mechanical properties of the Achilles tendon: Longitudinal response to repetitive loading exercise. J Strength Cond Res 32(11): 3070-3079, 2018-Sex differences have been observed in the mechanical properties of the Achilles tendon, which may help to explain the increased risk of injury in men. However, the response and recovery of tendon mechanics to repetitive loading exercise, as well as sex-dependent responses, are not well understood. The purpose of our study was to compare Achilles tendon mechanical properties between men and women before, immediately after, and 60 minutes after a repetitive loading exercise. Seventeen female (age: 24.0 ± 3.9 years; height: 167.4 ± 6.9 cm; and mass: 64.9 ± 8.5 kg) and 18 male (age: 23.9 ± 2.4 years; height: 179.2 ± 5.09 cm; and mass: 78.4 ± 8.7 kg) recreationally active individuals volunteered. Using isokinetic dynamometry and diagnostic ultrasound, baseline levels of Achilles tendon force, elongation, stiffness, stress, strain, and Young's modulus were assessed before 100 successive calf-raise exercises using a Smith machine at 20% of participant body mass. Outcomes were reassessed immediately and 60 minutes after exercise. Women exhibited less Achilles tendon force, stiffness, stress, and modulus compared with men, regardless of time point. Both sexes responded to repetitive loading exercise similarly, with immediate decreases in mechanical properties of the Achilles tendon from baseline to immediately after exercise. Tendon properties were observed to be equal to baseline values at 60-minute postexercise. Baseline differences in tendon properties may help to explain the disparity in injury risk because both sexes responded to and recovered from exercise similarly. Future research should aim to include additional time points (both leading up to and after 60 minutes), and assess tendon responses to more sport-specific activities, while also including patients diagnosed with Achilles tendon injuries.
莱普利（Lepley）、约瑟夫（Joseph）、戴格尔（Daigle）、迪贾科莫（Digiacomo）、加勒（Galer）、罗克（Rock）、罗泽尔（Rosier）和苏雷亚（Sureja）。跟腱机械性能的性别差异：重复性负荷运动的纵向反应。《力量与调节研究杂志》32 卷（11）：3070-3079 页，2018 年-跟腱的机械性能存在性别差异，这可能有助于解释男性受伤风险增加的原因。然而，跟腱力学对重复性负荷运动的反应和恢复，以及性别依赖性反应，尚不清楚。本研究的目的是比较男性和女性在重复性负荷运动前、即刻后和 60 分钟后的跟腱机械性能。17 名女性（年龄：24.0±3.9 岁；身高：167.4±6.9cm；体重：64.9±8.5kg）和 18 名男性（年龄：23.9±2.4 岁；身高：179.2±5.09cm；体重：78.4±8.7kg）自愿参加。使用等速测力仪和诊断超声，在使用史密斯机以 20%参与者体重进行 100 次连续小腿抬高运动之前，评估跟腱力、伸长率、刚度、应力、应变和杨氏模量的基线水平。在运动后即刻和 60 分钟重新评估结果。无论时间点如何，女性的跟腱力、刚度、应力和模量均低于男性。两性对重复性负荷运动的反应相似，跟腱力学特性在运动后即刻从基线立即下降。在运动后 60 分钟时，跟腱特性观察到与基线值相等。跟腱特性的基线差异可能有助于解释受伤风险的差异，因为两性对运动的反应和恢复相似。未来的研究应旨在包括更多的时间点（包括运动前和运动后 60 分钟），评估跟腱对更具运动特异性活动的反应，同时包括被诊断为跟腱损伤的患者。
