Sitting ergonomics: Different sitting postures & analysis of chair sitting muscle work
Different varieties sitting postures: A. Common sitting postures: 1. Chair sitting 2. Crossed sitting 3. Crossed sitting with arms wrapped around both knees & locked in front 4. Half crossed sitting 5. Crook sitting 6. Inclined sitting (to back) 7. Inclined sitting (to sides) 8. Inclined long sitting 9. Side sitting 10. Stoop sitting 11. Fall out sitting 12. Ride sitting 13. Kneel sitting 14. Crouch sitting B. Activities in sitting: 1. Twisting in sitting 2. Bending & reaching in sitting (sidewise- office works & in front- driving) 3. Hitching & Hiking (to relieve pressure on buttocks in prolonged sitting) C. Co-existing unavoidable stress factors in sitting: 1. Whole body vibration (driving) 2. Noise stress 3. Visual stress 4. Psychological stress Analysis of muscle work in sitting posture: Ideal sitting posture: The following discussion is in the context of a quiet id