Enomoto Shota, Shibutani Tomonari, Akihara Yu, Nakatani Miyuki, Yamada Kazunori, Oda Toshiaki
Center for Liberal Arts, Meiji Gakuin University, Yokohama 244-8539, Japan.
Institute of Sports Sciences, International Pacific University, Okayama 709-0863, Japan.
Healthcare (Basel). 2021 Oct 31;9(11):1483. doi: 10.3390/healthcare9111483.
The aim of the present study was to examine the acute effects of dermal suction on the passive mechanical properties of specific muscles and joints. Dermal suction was applied to the calves of 24 subjects. Passive plantar flexion torque was measured with the right knee fully extended and the right ankle positioned at 20°, 10°, 0°, and -10° angles, where 0° represents the ankle neutral position, and positive values correspond to the plantar flexion angle. The shear wave velocity (SWV) (m/s) of the medial gastrocnemius was measured in the same position using ultrasound shear wave elastography. The relationship between the joint angle and passive torque at each 10° angle was defined as passive joint stiffness (Nm/°). Passive muscle and joint stiffness were measured immediately before and after the dermal suction protocol. When the ankle joint was positioned at 20° ( = 0.53, = 0.006), 10° ( = 0.43, = 0.030), and -10° ( = 0.60, = 0.001), the SWV was significantly higher after dermal suction than that before dermal suction. Regarding joint stiffness, we found no significant difference between the pre- and post-dermal suction values ( = 0.093, > 0.05). These findings suggest that dermal suction increases passive muscle stiffness and has a limited impact on passive joint stiffness.
本研究的目的是探讨皮肤抽吸对特定肌肉和关节被动力学特性的急性影响。对24名受试者的小腿进行皮肤抽吸。在右膝完全伸展且右踝关节处于20°、10°、0°和-10°角度时测量被动跖屈扭矩，其中0°代表踝关节中立位，正值对应于跖屈角度。使用超声剪切波弹性成像在相同位置测量腓肠肌内侧的剪切波速度（SWV）（米/秒）。每10°角度的关节角度与被动扭矩之间的关系定义为被动关节刚度（牛米/度）。在皮肤抽吸方案前后立即测量被动肌肉和关节刚度。当踝关节处于20°（t = 0.53，P = 0.006）、10°（t = 0.43，P = 0.030）和-10°（t = 0.60，P = 0.001）时，皮肤抽吸后SWV显著高于抽吸前。关于关节刚度，我们发现皮肤抽吸前后的值之间没有显著差异（t = 0.093，P > 0.05）。这些发现表明，皮肤抽吸会增加被动肌肉刚度，而对被动关节刚度的影响有限。
