A seated resistance-machine exercise for the spinal extensors. The demonstrated machine guides a short range of trunk extension with the pelvis supported, rather than the longer-range neutral-spine or rounded-back variations.
Adjust the machine for the seated setup shown in the source and position the pelvis securely on the seat.
Place the torso against the machine support and keep the feet supported.
Extend the trunk against the machine resistance through the demonstrated short range.
Return under control without lifting the pelvis or forcing extra lower-back extension.
Keep the movement within the machine's controlled working range.
Keep the pelvis in contact with the seat.
Use a load that permits a smooth return without recoil.
Describing or performing the exercise standing instead of seated.
Substituting either longer-range Version 2 movement.
Lifting the pelvis off the seat to move the resistance.
Forcing the trunk beyond the demonstrated range or letting the machine pull it back abruptly.
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