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  • Prolonged sitting in the flexed posture.

  • Part one: biomechanical symptoms - lower body.

  • Do you recognize this sitting position?

  • Do you sit most hours of the day?

  • Do you feel discomfort or pain in your upper or lower back?

  • What happens to your body when you slump in your chair for too long?

  • Prolonged sitting in this position will in time cause rigidity and tightness in the tight muscles, and we can see them colored in blue.

  • And these are chronically short muscles, what we call locked short.

  • In addition to the posterior leg muscles, the hip flexors are also chronically short from prolonged sitting.

  • Rigidity in the hip flexor is a direct cause of weakness in the antagonist hip extenders.

  • Muscle imbalance.

  • Muscle imbalances are the number one cause of lower back pain.

  • What happens to the sacroiliac joint?

  • The joint between the sacrum and the pelvic bones.

  • The sacroiliac joint and the sacroiliac ligaments are under load.

  • What happens to the lumbar spine?

  • Here, we can see a neutral spine and lumbar flexion.

  • In prolonged slumped posture, the lumbar spine is flexed over time.

  • Damage includes increase in posterior analyst strain, damage to the analyst of the disc, increase in intradiscal pressure.

  • What happens to the connective tissues?

  • Flexed postures place stress on the posterior passive tissues.

  • In addition, the posterior ligaments are also impaired.

  • In the second part of the video, we'll learn the biomechanical symptoms in the upper body.

Prolonged sitting in the flexed posture.

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