Discipline of Podiatry, University of Newcastle, Ourimbah, NSW, 2258, Australia.
Discipline of Podiatry, University of Newcastle, Ourimbah, NSW, 2258, Australia.
Gait Posture. 2021 Jan;83:15-19. doi: 10.1016/j.gaitpost.2020.10.003. Epub 2020 Oct 9.
Research investigating differences in gluteus medius muscle activity in those with and without chronic nonspecific low back pain is both limited and conflicting. Additionally, in these populations the relationship between gluteus medius muscle activity, foot type, and transversus abdominis muscle thickness is unclear.
We aimed to investigate gluteus medius muscle activity during gait in those with and without chronic nonspecific low back pain. Secondarily, we aimed to explore the association between gluteus medius muscle activity, foot type, and transversus abdominis muscle thickness within groups.
This case control study recruited 30 people with and 30 people without chronic nonspecific low back pain and matched participants by age (±5 years), sex, and body mass index (±2 BMI units). Gluteus medius muscle activity was measured with surface electromyography during walking gait, with foot type and transversus abdominis muscle thickness measured with the Foot Posture Index and ultrasound respectively. The Mann-Whitney U test was used to investigate differences in gluteus medius muscle activity between groups. Spearman rank order correlation was performed to explore the association between gluteus medius muscle activity, foot type, and transversus abdominis thickness within each group. A linear regression was used to analyse significant correlations (P < 0.05).
We found no significant differences in gluteus medius muscle activity between groups. However, there was a moderate correlation between the Foot Posture Index score and gluteus medius peak amplitude (P = 0.04) for those with mild to moderate chronic nonspecific low back pain.
Clinicians should be aware that patients with mild to moderate chronic nonspecific low back pain may not demonstrate significant differences in gluteus medius muscle activity compared to those without back pain. Additionally, higher peak gluteus medius muscle activity is likely to occur in people with mild to moderate chronic nonspecific low back pain and planus feet.
研究患有和不患有慢性非特异性下腰痛人群的臀中肌活动差异的研究既有限又存在冲突。此外，在这些人群中，臀中肌活动、足型和腹横肌厚度之间的关系尚不清楚。
我们旨在研究患有和不患有慢性非特异性下腰痛人群在步态中的臀中肌活动。其次，我们旨在探索组内臀中肌活动、足型和腹横肌厚度之间的关系。
这项病例对照研究招募了 30 名患有慢性非特异性下腰痛的人和 30 名没有慢性非特异性下腰痛的人，并通过年龄（±5 岁）、性别和体重指数（±2 BMI 单位）对参与者进行匹配。在步行步态中，使用表面肌电图测量臀中肌活动，使用足型指数和超声分别测量足型和腹横肌厚度。使用 Mann-Whitney U 检验比较组间臀中肌活动的差异。使用 Spearman 秩相关分析探索每组内臀中肌活动、足型和腹横肌厚度之间的关系。使用线性回归分析显著相关性（P < 0.05）。
我们没有发现组间臀中肌活动有显著差异。然而，对于轻度至中度慢性非特异性下腰痛患者，足型指数评分与臀中肌峰值振幅之间存在中度相关性（P = 0.04）。
临床医生应该意识到，与没有腰痛的患者相比，患有轻度至中度慢性非特异性下腰痛的患者臀中肌活动可能没有显著差异。此外，轻度至中度慢性非特异性下腰痛和扁平足患者的臀中肌峰值活性可能更高。
