Fig. 1 .Electrode attachment position
Fig. 2. Muscle activity mesure and position of upper body when lowering the stretcher
Fig. 3. Muscle activity mesure and position of upper body when lifting the stretcher
Table 1. Physical characteristics
Table 2. Electrode attaching position
Table 3. The 8 muscle activity when head and neck bending posture with or without helmet
Table 4. The 8 muscle activity when head and neck right bending posture with or without helmet
Table 5. The 8 muscle activity when head and neck flexion posture with or without helmet
Table 6. The 8 muscle activity when head and neck hyperextension posture with or without helmet
Table 7. The muscle activity of upper body when lifting 32.5kg with or without helmet
Table 8. The muscle activity of upper body when lowing 32.5kg with or without helmet
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