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Back Mechanics

Back Mechanics. Presented by QBE Loss Control Services. Back Injuries Statistics. 25% of low back injuries account for 95% of costs of low back injuries NIOSH- 70% of general public will have back pain in their lifetime 80% of back pain caused by inadequate exercise

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Back Mechanics

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  1. Back Mechanics Presented by QBE Loss Control Services

  2. Back Injuries Statistics • 25% of low back injuries account for 95% of costs of low back injuries • NIOSH- 70% of general public will have back pain in their lifetime • 80% of back pain caused by inadequate exercise • Back injuries account for 25% of all WC claims and 33-44% of all WC costs

  3. Spinal Column

  4. The spine is made up of 33 vertebrae. The upper 24 vertebrae are separated by a jelly filled layered ligaments called disks. These disks act as shock absorbers for the spine. The facet joints are the back part of the vertebrae that form the channel for the spine. The lumbar region are the five large vertebra composing the lower back, allowing the back to bend forward and back.

  5. Spinal Column

  6. Discs and Force

  7. Herniated Discs

  8. Lower Spine

  9. Spine Range of Motion

  10. Spine Range of Motion

  11. Spine Range of Motion

  12. Back Mechanics

  13. Danger Zones

  14. Anatomy of Proper Lifting

  15. Anatomy of Proper Lifting If you are out of physical shape can also result in increased loads when we improperly lift.

  16. Balance of Forces

  17. Balance of Forces Without Weight Torso Arms Head ? lb x 2 in = (65 lb x 9 in) + (15 lb x 15 in) + (25 lb x 24 in) ? X 2 in = 1410 lbs Force on Back = 705 lbs

  18. Balance of Forces With Weight Torso Arms Head Object ? lb x 2 in = (65 lb x 9 in) + (15 lb x 15 in) + (25 lb x 24 in) +(20 lb x 36 in) ? X 2in = 2130 lbs Force on Back = 1065 lbs

  19. Equivalent Forces

  20. Relative Disk Pressure

  21. Relative Disk Pressure Sitting Posture

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