title: Fatigue and recovery during and after static loading.
abstract: Subjectively assessed endurance time (ET), resumption time (RT) and perceived discomfort, pain or fatigue (PD), and objectively measured maximum force-exerting capacity were investigated for varying loads and durations of a pushing task with two repeated trials. Beyond the main results quantifying how the load scenario affected ET, RT and PD, three additional results are of note: (1) although the maximum pushing force did not change between trials, shorter ET, longer RT and higher PD indicated accumulation of fatigue in Trial 2; (2) the PD ratings showed a trend with a linear increase during loading and a curvilinear decrease during recovery; and (3) the RT and the load level for different relative loading times were found to have an unexpected U-shaped relationship, indicating lowest fatigue at the intermediate load level. These results can be used to model a more sustainable and productive work-recovery ratio.
authors.affiliation: a Department of Health Systems Engineering, Unit of Ergonomics, School of Technology and Health , KTH, The Royal Institute of Technology , Huddinge , Sweden.
authors.forename: Linda M
authors.initials: LM
authors.lastname: Rose
authors.forename: W Patrick
authors.initials: WP
authors.lastname: Neumann
authors.forename: Göran M
authors.initials: GM
authors.lastname: Hägg
authors.forename: Göran
authors.initials: G
authors.lastname: Kenttä
mesh_terms: D000293:Adolescent; D000328:Adult; D006801:Humans; D008297:Male; D008875:Middle Aged; D018763:Muscle Fatigue / Q000502:physiology*; D005082:Physical Exertion / Q000502:physiology*; D020127:Recovery of Function / Q000502:physiology; D013997:Time Factors; D016474:Weight-Bearing / Q000502:physiology*; D055815:Young Adult
keywords: force; perceived discomfort/pain/fatigue; resumption time; subjective assessment