Al Amer Hamad S, Sabbahi Mohamed A, Alrowayeh Hesham N, Bryan William J, Olson Sharon L
Department of Physical Therapy, Faculty of Applied Medical Sciences, University of Tabuk, Tabuk, 71491, Saudi Arabia.
School of Physical Therapy, Texas Woman's University, 6700 Fannin Street, Houston, TX, 77030, USA.
BMC Res Notes. 2018 Jun 5;11(1):356. doi: 10.1186/s13104-018-3464-9.
The sit-to-stand (STS) is a simple test to evaluate the functional performance of the quadriceps muscle in patients with knee osteoarthritis (OA). The aim was to evaluate the electromyographic (EMG) activity of the ipsilateral quadriceps during STS task at different seat heights and feet positions in patients with severe unilateral OA. The EMG activity was recorded in a group of eight participants with unilateral OA during the performance of STS task in four conditions: (1) knee-height seat with feet together, (2) knee-height seat with feet askew (feet side by side and heel-to-toe), (3) low-height seat (25% lower than knee-height seat) with feet together, and (4) low-height seat with feet askew.
There was a statistically significant difference among the four conditions in the EMG activity (p =0.004). Particularly, the EMG activity of the quadriceps was significantly higher when participants rose from the low height with their feet askew than when they rose from the knee height with their feet placed together (p =0.004) or askew (p =0.002). These results recommend considering initial feet position and seat height when evaluating the functional activity of the quadriceps in patients with unilateral OA using STS test.
坐立试验（STS）是评估膝骨关节炎（OA）患者股四头肌功能表现的一项简单测试。本研究旨在评估重度单侧OA患者在不同座椅高度和双脚位置进行STS任务时同侧股四头肌的肌电图（EMG）活动。在8名单侧OA患者进行STS任务的四种情况下记录EMG活动：（1）座椅高度为膝盖高度且双脚并拢；（2）座椅高度为膝盖高度且双脚呈外八字（双脚并排，脚跟对脚尖）；（3）座椅高度较低（比膝盖高度座椅低25%）且双脚并拢；（4）座椅高度较低且双脚呈外八字。
四种情况下的EMG活动存在统计学显著差异（p = 0.004）。特别是，当参与者从较低高度且双脚呈外八字起身时，股四头肌的EMG活动显著高于从膝盖高度且双脚并拢（p = 0.004）或呈外八字（p = 0.002）起身时。这些结果建议在使用STS测试评估单侧OA患者股四头肌的功能活动时，应考虑初始双脚位置和座椅高度。
