The skeleton
- The framework and levers for muscle attachment and protection of organs
- The vertebrae encase the spinal cord and permit movement
- The discs provide cushioning and help support & distribute weight of the body
- Bending and twisting the back, the discs experience unequal pressure and you risk damaging them
The Muscles
- Main muscles are quadriceps, hamstrings, abdominals and arm muscles
- Some back muscles are small and are designed for assistance in posture, not heavy work
- Muscle work most efficiently in mid range rather than full extension or flexion
