Pelvic musculature: 1. cross the LS joint onto the trunk 2. cross the hip joint onto the thigh/leg 3. pelvic floor muscles located wholly within the pelvis
If the psoas major frontal plane open-chain action is abduction of the thigh at the hip joint, the closed-chain action is depression of the pelvis.
The Psoas Major may hold the distinction of being the most important as well as the most misunderstood muscle in the human body.
This video covers the attachments, actions, and motion patterns of the iliacus, explaining the biomechanics of how the iliacus functions.
5 Pilates Mat Abdominal Series exercises: Single Leg Stretch, Double Leg Stretch, Single Straight Leg Stretch, Double Straight Leg Stretch, & Criss-Cross.