Endurance time, muscular activity and the hand/arm tremor for different exertion forces of holding. Issue 1 (2nd January 2016)

• Record Type: Journal Article
• Authors: Lee, Tzu-Hsien
• Is Part Of: International journal of occupational safety and ergonomics. Volume 22:Issue 1(2016)
• Page Start: 71
• Page End: 76
• Publication Date: 2016-01-02
• Subjects: vibration -- steadiness -- capability -- musculoskeletal injury; Human engineering -- Periodicals; Industrial safety -- Periodicals; Human Engineering -- Periodicals; Occupational Health -- Periodicals; Ergonomie -- Périodiques; Sécurité du travail -- Périodiques; Human engineering; Industrial safety; Periodicals; 620.8
• DOI: 10.1080/10803548.2015.1117781
• Languages: English
• ISSNs: 1080-3548

Abstract

Abstract : This study aimed to examine the effects of exertion force on endurance time, muscular activity and hand/arm tremor during holding. Fifteen healthy young males were recruited as participants. The independent variable was exertion force (20%, 40%, 60% and 80% maximum holding capacity). The dependent variables were endurance time, muscular activity and hand/arm tremor. The results showed that endurance time decreased with exertion force while muscular activity and hand/arm tremor increased with exertion force. Hand/arm tremor increased with holding time. Endurance time of 40%, 60% and 80% maximum holding capacity was approximately 22.7%, 12.0% and 5.6% of that of 20% maximum holding capacity, respectively. The rms (root mean square) acceleration of hand/arm tremor of the final phase of holding was 2.27-, 1.33-, 1.20- and 1.73-fold of that of the initial phase of holding for 20%, 40%, 60% and 80% maximum holding capacity, respectively.