Shoulder muscle tenderness and physical features of female industrial workers.

摘要: Physique, muscle strength, and jump-step scores of female industrial workers, ages 17--34, were studied in relation to tenderness shoulder muscles for five groups, (A) character display operators, (B) fluorescent lamp assemblers, (C) photographic film rolling (D) teachers nurses handicapped children, (E) office workers. No significant differences found between the groups mean body height, weight, skinfold thickness, but knee extension force A C back strength A, B, was significantly lower than that group E. Workers D with a low threshold m. trapezius 0.6 kg/cm2 or less had stiff shoulders more frequently levels extension, muscle, upper arm abduction those without tenderness. similar tendency B Further, among workers objective signs occupational cervicobrachial disorder, there few whose above averages normal Shoulder such operators revealed be continuously contracted during operations. The possible effects chronic fatigue due repetitive operations on developing localized hazards are discussed.