Characteristics of trunk muscle activation and plantar pressure distribution in patients with chronic low back pain in static standing
10.3969/j.issn.1006-9771.2025.04.012
- VernacularTitle:慢性腰痛患者静止站立时躯干肌的激活特征及足底压力分布
- Author:
Zhaoqiang XU
1
;
Yan LI
;
Jiahui PENG
;
Haoyu XIE
;
Yu CHEN
;
Chuhuai WANG
Author Information
1. 中山大学附属第一医院康复医学科,广东 广州市 510062
- Publication Type:Journal Article
- Keywords:
chronic low back pain;
surface electromyography;
co-contraction index;
plantar pressure;
static standing task
- From:
Chinese Journal of Rehabilitation Theory and Practice
2025;31(4):466-475
- CountryChina
- Language:Chinese
-
Abstract:
Objective To compare trunk muscle activation,muscle co-contraction levels and plantar pressure distribution between patients with chronic low back pain(cLBP)and healthy subjects during static standing.Methods From July,2021 to July,2022,17 healthy subjects(healthy control group)and 18 cLBP patients(cLBP group)were recruited from the Department of Rehabilitation Medicine,the First Affiliated Hospital of Sun Yat-sen Uni-versity.Demographic information was collected for both groups,as well as the pain intensity,functional disabili-ty,and center of pressure displacement parameters of the cLBP group in static standing.A plantar pressure plate was used to record plantar pressure distribution in static standing task.Simultaneously,a wireless surface electro-myography(sEMG)system was used to record the activity of the transverse abdominis(TrA),erector spinae(ES)and lumbar multifidus(LM).The activation levels of each muscle and the co-contraction index(CCI)between trunk muscle pairs were analyzed.Results Compared with the healthy control group,the cLBP group showed higher activation levels of the bilateral LM(∣t∣>2.479,P<0.05)and higher lumbar-abdominal muscle CCI of left LM-left TrA(t=2.212,P=0.042),left LM-right TrA(t=2.868,P=0.008)and right LM-right TrA(U=75.000,P=0.009).In the cLBP group,pres-sure decreased in the right big toe region(t=2.825,P=0.009),and increased in the right medial and left lateral heel regions(U<77.000,P<0.05).Conclusions During static standing,patients with cLBP require higher level of trunk muscle activation and co-contrac-tion,with a posterior shift in plantar pressure distribution,which might be due to the adoption of different postur-al compensation strategies to maintain postural stability.
