- Sit in machine with feet on platform, back under padded lever,
and hips against back of seat.
- Extend lower hips and low back until extended. Return and
- Those with limited
hip flexor flexibility may need to stop before full extension
on this particular type of apparatus (fulcrum near hip). Full
range of motion will vary from person to person. Many machines
may not sufficiently stabilize hips or their fulcrum may be near
hip's axis. In which case, synergists muscles become primary
movers and erector spinae becomes stabilizer (Graves JE, et.
al. 1994). See alternative back extension machines (Nautilus
and MedX) with hip stabilization.
Synergists (see comments)