首页 | 本学科首页   官方微博 | 高级检索  
     


Back extensor muscle oxygenation and fatigability in healthy subjects and low back pain patients during dynamic back extension exertion
Authors:Markku Kankaanp    , Willy N. Colier, Simo Taimela, Christoph Anders, Olavi Airaksinen, Satu-Mari Kokko-Aro,Osmo H  nninen
Affiliation:

aDepartment of Physical Medicine and Rehabilitation, Kuopio University Hospital, P.O. Box 1777, 70211 Kuopio, Finland

bDepartment of Physiology, University of Nijmegen, P.O. Box 9101, 6500 HB Nijmegen, The Netherlands

cDBC International Ltd., Helsinki, Finland

dMotor Research Group, Institute for Pathophysiology and Pathobiochemistry, Friedrich-Schiller-University Jena, 07740 Jena, Germany

eDepartment of Physiology, Kuopio University, P.O. Box 1627, 70210 Kuopio, Finland

Abstract:The purpose of this study was to assess if chronic low back pain patients have impaired paraspinal muscle O2 turnover and endurance capacity as compared to healthy control subjects during dynamic exercise. Middle-aged healthy male subjects (n = 12, control) and male patients with chronic low back pain (n = 17, CLBP) participated in the study. L4–L5 level paraspinal muscle fatigue was objectively assessed during earlier validated 90 s dynamic back endurance test (spectral EMG, MPFslope). Also EMG amplitude (EMGamplitude) and initial MPF (MPFinitial) were assessed from the initial 5 s of the endurance contraction. Simultaneously near infrared spectroscopy (NIRS) was used for quantitative measurement of local L4–L5 paraspinal muscle O2 consumption. Subcutaneous tissue thickness (ATT) was measured from the EMG and NIRS recording sites. The results indicated that control and CLBP groups were compatible as regarding anthropometric variables, paraspinal muscle activation levels (EMGamplitude), initial MPF (MPFinitial) and ATT. When the ATT was used as a covariate in the ANOVA analysis, CLBP group did not show significantly greater paraspinal muscle fatigability (right MPFslope – 12.2 ± 10.7%/min, left right MPFslope – 12.6 ± 13.3%/min) or O2 consumption (right NIRSslope – 52.8 ± 79.6 μM/l/s) as compared to healthy controls (right MPFslope – 11.9 ± 7.6%/min, left MPFslope – 12.7 ± 8.6%/min, right NIRSslope – 53.7 ± 95.2 μM/l/s). As a conclusion, these CLBP male patients did not show any impaired rate of paraspinal muscle oxygen consumption or excessive paraspinal muscle fatigability during dynamic exercise as compared with healthy controls. Subcutaneous tissue thickness has a strong influence on the NIRS and EMG amplitude measurements and, if unchecked, it could result in the false interpretation of the results.
Keywords:Muscle oxygenation   Exertion   Low back pain
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号