The Influence of Workload on Muscle Fatigue, Tissue Properties, and Postural Stability in Older and Younger Workers

Two groups of workers were recruited: an older group of workers aged 50 and above, and a group of younger workers (≤50 years). Both groups were tested before and after a standard workday. During these visits, participants completed evaluations of physical and physiological variables, as well as objective self-reported measures. The physical and physiological evaluations included (1) a back extensor task to assess muscle fatigue using the modified Sorensen task, (2) a spine height assessment using a stadiometer, and (3) a postural stability test conducted on a force platform. The objective of self-reported measures included sociodemographic information’s and job satisfaction.