Muscular activity of lower limb muscles associated with working on inclined surfaces

作者：Lu Ming Lun^*; Kincl Laurel; Lowe Brian; Succop Paul; Bhattacharya Amit

来源：Ergonomics, 2015, 58(2): 278-290.

DOI：10.1080/00140139.2014.968634

• fatigue
• inclined surfaces
• EMG
• visual cues
• postural stability

This study investigated the effects of visual cues, muscular fatigue, task performance and experience of working on inclined surfaces on activity of postural muscles in the lower limbs associated with maintaining balance on three inclined surfaces - 0 degrees, 14 degrees and 26 degrees. Normalised electromyographic (NEMG) data were collected in 44 professional roofers bilaterally from the rectus femoris, biceps femoris, tibialii anterior and gastrocnemii medial muscle groups. The 50th and 95th percentile NEMG amplitudes were used as EMG variables. Results showed that inclination angle and task performance caused a significant increase in the NEMG amplitudes of all postural muscles. Visual cues were significantly associated with a decrease in the 95th percentile EMG amplitude for the right gastrocnemius medial and tibialis anterior. Fatigue was related to a significant decrease in the NEMG amplitude for the rectus femoris. Experience of working on inclined surfaces did not have a significant effect on the NEMG amplitude.

• 出版日期2015-2-1
• 单位国家安全生产监督管理总局信息研究院