Yoshida Takaki, Tanino Yoshitsugu, Nakao Tetsuya, Yamazaki Wataru, Suzuki Toshiaki
Clinical Physical Therapy Laboratory, Kansai University of Health Sciences, Kumatori, Japan.
Prog Rehabil Med. 2024 Feb 10;9:20240006. doi: 10.2490/prm.20240006. eCollection 2024.
Improving ankle joint contracture is important because stiffness in ankle dorsiflexion can lead to pain, especially when weight-bearing during walking, which tends to concentrate on the forefoot. We hypothesized that the contraction of the gastrocnemius muscle in ankle dorsiflexion would increase the Achilles tendon length and improve the dorsiflexion range of motion. We evaluated the effects of walking with and without a gradient on Achilles tendon length.
This study included 23 men who underwent ultrasound imaging to measure the Achilles tendon length while they stood on an inclined table adjusted according to the dorsiflexion angle. Treadmill walking was performed for 10 min with a 10° incline (gradient condition) or without gradient (level condition). The measurements were compared using a paired -test.
In the gradient condition, the range of motion for ankle dorsiflexion was significantly increased after the intervention. In the gradient condition, the Achilles tendon length while standing on an inclined surface was significantly increased after the intervention.
Walking under gradient conditions led to the extension of the Achilles tendon in the ankle dorsiflexion position. This was accompanied by contraction of the gastrocnemius muscle, resulting in lengthening of the Achilles tendon. This finding suggests that such interventions may have clinical applications.
改善踝关节挛缩很重要，因为踝关节背屈僵硬会导致疼痛，尤其是在行走负重时，疼痛往往集中在前足。我们假设在踝关节背屈时腓肠肌的收缩会增加跟腱长度并改善背屈活动范围。我们评估了有坡度和无坡度行走对跟腱长度的影响。
本研究纳入了23名男性，他们在根据背屈角度调整的倾斜台上站立时接受超声成像测量跟腱长度。在有10°坡度（坡度条件）或无坡度（水平条件）下进行10分钟的跑步机行走。测量结果采用配对检验进行比较。
在坡度条件下，干预后踝关节背屈活动范围显著增加。在坡度条件下，站立在倾斜表面时跟腱长度在干预后显著增加。
在坡度条件下行走导致踝关节背屈位跟腱延长。这伴随着腓肠肌收缩，导致跟腱延长。这一发现表明此类干预可能具有临床应用价值。
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