Sex differences in upper limb musculoskeletal biomechanics during a lifting task.
Women experience higher prevalence of work-related upper limb musculoskeletal disorders compared to men. Previous studies have investigated the biological, kinematic and electromyographic sex-related differences during a lifting task but the actual differences in musculoskeletal loads remain unknown. We investigated the sex differences in three musculoskeletal indicators: the sum of muscle activations, the sum of muscle forces and the relative time spent beyond a shear-compression dislocation ratio. A musculoskeletal model was scaled on 20 women and 20 men lifting a 6 or 12kg box from hip to eye level. Women generated more muscle forces and activations than men, regardless of the lifted mass. Those differences occurred when the box was above shoulder level. In addition, women might spend more time beyond a shear-compression dislocation ratio. Our work suggests higher musculoskeletal loads among women compared to men during a lifting task, which could be the result of poor technique and strength difference.
['Martinez|Romain|R|', 'Assila|Najoua|N|', 'Goubault|Etienne|E|', 'Begon|Mickaël|M|']
D000328:Adult D001696:Biomechanical Phenomena D004576:Electromyography D006804:Ergonomics D005260:Female D064368:Healthy Volunteers D006801:Humans D017770:Lifting D008297:Male D018482:Muscle, Skeletal D009140:Musculoskeletal Diseases D009784:Occupational Diseases D012737:Sex Factors D012782:Shoulder D013647:Task Performance and Analysis D034941:Upper Extremity D016474:Weight-Bearing D016526:Workload D055815:Young Adult
Sex differences Upper limb Musculoskeletal modelling