title: Upper limb load as a function of repetitive task parameters: part 2--an experimental study.
abstract: The aim of the study was to compare the theoretical indicator of upper limb load with the physiological indicator of musculoskeletal load, which is present while performing a repetitive task (a normalized electromyography [EMG] amplitude recorded from the muscles of the upper limb involved in the performed task). In an experimental study of a repetitive task, the EMG signal from 5 main muscles of the shoulder girdle, arm and forearm was registered: extensor carpi radialis longus, flexor carpi ulnaris, deltoideus anterior, biceps brachii caput breve and trapezius descendent. The results of the study showed a strong correlation between the theoretical indicator (Integrated Cycle Load) and the physiological indicator (root mean square of a normalized EMG amplitude from the 5 muscles). This proves that the developed theoretical indicator can be accepted as an indicator of upper limb musculoskeletal load during a work task.
authors.affiliation: Central Institute for Labour Protection - National Research Institute, Warsaw, Poland. daliu@ciop.pl
authors.forename: Danuta
authors.initials: D
authors.lastname: Roman-Liu
authors.forename: Tomasz
authors.initials: T
authors.lastname: Tokarski
mesh_terms: D000328:Adult; D001132:Arm / Q000502:physiology*; D012090:Cumulative Trauma Disorders / Q000517:prevention & control*; D004576:Electromyography / Q000295:instrumentation / Q000379:methods; D006804:Ergonomics / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D008297:Male; D009068:Movement / Q000502:physiology*; D009119:Muscle Contraction / Q000502:physiology; D018482:Muscle, Skeletal / Q000502:physiology*; D016474:Weight-Bearing / Q000502:physiology