9
The STABILIZER is used to monitor proximal trunk
stability to detect substitution for the tested
muscle’s action.
6. Iliopsoas
• Place the three-chamber pressure cell behind the lumbar
spine and inflate to baseline of 40 mmHg (orange band).
• Draw in abdominal wall without thoracic or pelvic
movement.
• Pressure should increase 8-10 mmHg.
• Lift one leg slowly to test position with the other leg
unsupported (i.e., no stool). Pressure should remain
constant at 48-50 mmHg.
• Hold for 5 seconds.
• Perform 10 repetitions.
Sitting Upright
7. Gluteus Maximus
• Place the three-chamber pressure cell under the
abdomen and inflate to baseline of 70 mmHg.
(brown band)
• Draw abdominal wall up and in as described in
Exercise 1. (Prone test for Transverse Abdominis and
Internal Obliques.)
• Extend hip by lifting knee up 5 cm (2 in) off
supporting surface. The pressure must remain
constant.
• Hold for 5 seconds.
• Perform 10 repetitions.
Lying on abdomen
