Electromyographic Analysis of a Repetitive Hand Gripping Task

• Autorzy: Cook T. , Rosecrance J. , Zimmermann C. , Gerleman D. , Ludewig P.
• Języki publikacji: EN

Abstrakty

EN

Electromyography (EMG) has been proposed as a method for determining muscle effort in repetitive upper limb tasks, which are often related to cumulative trauma disorders. EMG activity of the finger flexor musculature was investigated during a repetitive hand gripping task having 5 different cycle durations (2 to 6 s), various percentage of work time (and rest) within the work cycle (20% to 80%), and 3 different grip force levels. Thirty healthy adult participants each performed 27 randomly ordered 30-s repetitive hand gripping trials as well as 3 isometric contractions, which were used to normalize data from the hand gripping trials. There was a significant decrease in mean EMG as the duration of the work-rest cycle time increased. At each force level, EMG increased as the percentage of work time within the work-rest cycle increased, but to a greater extent at the highest force level. The results of this study suggest that overall muscle effort, and perhaps muscle fatigue, can be reduced most effectively by modifying the force requirements of the repetitive task. Other variables, such as the percentage of work time within a cycle and overall work cycle time have less effect on the EMG activity level. The results of this study have implications for developing strategies to reduce muscle fatigue during repetitive hand gripping tasks in an effort to reduce the effects of cumulative trauma disorders.

Słowa kluczowe

EN

electromyography; cumulative trauma disorders; work-rest cycle; muscle force; hand gripping

PL

elektromiografia; siła mięśni; cykl pracy; kończyna górna

• Wydawca: Taylor & Francis
• Czasopismo: International Journal of Occupational Safety and Ergonomics
• Rocznik: 1998
• Tom: Vol. 4, No. 2
• Strony: 185--198
• Opis fizyczny: Bibliogr. 28 poz., tab., wykr.

Twórcy

autor

Cook T.

• University of Iowa, USA

autor

Rosecrance J.

• University of Iowa, USA

autor

Zimmermann C.

• University of Iowa, USA

autor

Gerleman D.

• Physical Therapy Graduate Program, USA

autor

Ludewig P.

• University of Iowa, USA

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