3.2 Hip
The hip joint is a ball and socket joint, formed by the head of the Femur (thigh bone) and the
acetabulum of the pelvis. The dome-shaped head of the femur forms the ball, which fits snuggly into the
concave socket of the acetabulum. The hip joint is a very sturdy joint, due to the tight fitting of the bones
and the strong surrounding ligaments and muscles.
3.2.1 Hip Abduction – Adduction (Lying on Side)
Rotation Axis: Opposite the hip joint 1 cm medially to the anterior superior iliac spine
Anatomical Zero: Straight leg
Range of Motion: Up to 45 degrees for adduction and up to 25 degrees for
Abduction. However, in isokinetic position the abduction is blocked by the
other leg
Isoforce offers one positioning possibility, lazing on side. There are two variations
depending if the tester wished the subject to look or not at the screen (designated as away in the
software).
Muscles Involved: Gluteus medius, adductor magnus.
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