Optimization Model Estimates of Trunk Muscle Forces Do Not Correlate with EMG Activity of Females as Well as Males

Autor:	Jeffrey C. Woldstad, R. E. Hughes, Mark L. McMulkin
Rok vydání:	2003
Předmět:	medicine.medical_specialty business.industry Rehabilitation Biophysics Physical Exertions Isometric exercise Anatomy Torso Compression (physics) Physical medicine and rehabilitation medicine.anatomical_structure medicine Orthopedics and Sports Medicine Biomechanical model Trunk muscle business
Zdroj:	Journal of Applied Biomechanics. 19:131-138
ISSN:	1543-2688 1065-8483
Popis:	Biomechanical optimization models are often used to estimate muscular and intervertebral disc forces during physical exertions. The purpose of this study was to determine whether an optimization-based biomechanical model predicts torso muscular activity of males and females equally well. The Minimum Intensity Compression (MIC) model, which has been extensively applied in industrial ergonomic task analysis, was used to estimate muscle forces for 3D moments. Participants (6 M, 6 F) performed 18 isometric exertions resisting 3D L3/L4 moments while electromyographic (EMG) activity was recorded for 8 muscles. Overall, model force estimates correlated better with male EMG activity (R2 = 0.43) than with female EMG activity (R2 = 0.33). Model force estimates of 4 muscles (LRA, RRA, REO, and RES) correlated better with male EMG activity than with female EMG. We conclude that trunk muscle forces estimated by current biomechanical modeling do not correlate equally well to male and female EMG activity. Future research needs to address validation or improvement of biomechanical trunk models for females.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3e79788cdc65fac34b1e78424f54b2d6 https://doi.org/10.1123/jab.19.2.131 Zobrazit plný text záznamu