Université Paris-Saclay.
Motor Control. 2020 Aug 5;24(4):527-542. doi: 10.1123/mc.2020-0014.
The sit-to-stand transfer can be separated into a postural phase (trunk flexion) and a focal phase (whole-body extension). The aim of this study was to analyze the as yet little known whole-body muscular activity characterizing each phase of this task and its variations with backrest inclination and execution speed. Fifteen muscles of the trunk and lower limbs of 10 participants were investigated using surface EMG. Results showed that backrest-induced modifications were mostly confined to the postural phase: reclining the backrest increased its duration and the activity level of the sternocleidomastoideus, the rectus and obliquus externus abdominis, and the semitendinosus. Speed-induced variations were also predominant during the postural phase, which was shortened with an increased activity of most muscles at maximal speed.
从坐姿到站姿的转换可以分为姿势阶段（躯干前倾）和聚焦阶段（全身伸展）。本研究的目的是分析这一任务的各个阶段以及其随靠背倾斜度和执行速度的变化而尚未被充分了解的整个身体肌肉活动特征。使用表面肌电图研究了 10 名参与者的躯干和下肢的 15 块肌肉。结果表明，靠背引起的变化主要局限于姿势阶段：向后倾斜靠背会增加其持续时间以及胸锁乳突肌、腹直肌和腹外斜肌以及半腱肌的活动水平。速度引起的变化也主要发生在姿势阶段，随着最大速度时大多数肌肉的活动增加，这个阶段会缩短。
