1: Lie supine, sacrum centred over middle gridline on base mat. Hips at 0° with legs flat on the mat.
2: Lower housing height to align flat pad with apex of medial malleoli of each ankle.
3: Feet in line with knees/hips and patella (knee caps) point to ceiling.
4: Record height of top of carriers.
1: Test bilaterally - Adduction.
2: Squeeze into pads, pull upper thighs and ankle bones together.
3: Maintain lumbar neutral, flat/still sacrum, and abdominal wall flat/hollow.
4: Discourage gluteal contraction.
5: Build to maximum force over 5 seconds.