Department of Physical Therapy, College of Life and Health Science, Hoseo University, Asan, Korea.
Smart Healthcare Convergence Research Center, Hoseo University, Asan, Korea.
J Back Musculoskelet Rehabil. 2024;37(1):67-73. doi: 10.3233/BMR-220284.
Sedentary work may lead to low back pain. In particular, a slumped sitting position may exacerbate low back pain because of tissue damage caused by excessive lumbar flexion and posterior pelvic tilting. Subjects with low back pain may have excessive changes in the lumbopelvic posture and back muscle activity in the sitting position.
The purpose of this study was to compare the effects of vibration-based biofeedback using a motion sensor belt and no biofeedback on multifidus (MF) muscle activity and pelvic tilt angle during typing.
Thirty subjects with low back pain accompanied by hip flexion limitation (15 each in the biofeedback and non-biofeedback groups) were enrolled. Electromyography was used to investigate MF muscle activity before and after typing for 30 min. Pelvic tilt was measured after typing in a sitting position for 30 min. Independent t-tests were used to compare MF muscle activity, and pelvic and second sacrum tilt angles, between the biofeedback and non-biofeedback groups.
After typing for 30 min, changes in MF muscle activity (11.45% and -7.19% for the biofeedback and nonbiofeedback groups, respectively) and pelvic and second sacrum tilt angles (3.15∘ and 4.12∘ for the biofeedback group and -11.05∘ and -18.16∘ for the non-biofeedback group, respectively) were significantly smaller in the biofeedback than non-biofeedback group (p< 0.05).
Vibration-based biofeedback minimizes the reduction in MF muscle activity and changes in pelvic and second sacrum tilt angles during typing in individuals with low back pain accompanied by hip flexion limitation.
久坐工作可能导致下背痛。尤其，坐姿时的懒散姿势可能会加剧下背痛，因为过度的腰椎前屈和后骨盆倾斜会导致组织损伤。下背痛患者在坐姿时可能会出现腰椎骨盆姿势和背部肌肉活动的过度变化。
本研究的目的是比较基于振动的生物反馈（使用运动传感器带）和无生物反馈对伴有髋关节屈曲受限的下背痛患者打字时多裂肌（MF）肌肉活动和骨盆倾斜角的影响。
纳入了 30 名伴有髋关节屈曲受限的下背痛患者（每组 15 名，分别在生物反馈和非生物反馈组）。在打字 30 分钟前后使用肌电图研究 MF 肌肉活动。在坐姿打字 30 分钟后测量骨盆倾斜度。使用独立 t 检验比较生物反馈和非生物反馈组之间的 MF 肌肉活动以及骨盆和第二骶骨倾斜角度。
打字 30 分钟后，生物反馈组和非生物反馈组的 MF 肌肉活动变化（分别为 11.45%和-7.19%）和骨盆和第二骶骨倾斜角度（分别为 3.15∘和 4.12∘和-11.05∘和-18.16∘）的变化明显小于非生物反馈组（p<0.05）。
基于振动的生物反馈可最大程度地减少伴有髋关节屈曲受限的下背痛患者打字时 MF 肌肉活动的减少和骨盆及第二骶骨倾斜角度的变化。
