Machine Back Extension
A seated selectorized extension that presses the torso back into a roller pad to train the spinal erectors.
How to do it
- Sit in the back-extension machine with both feet planted on the footplate.
- Set the roller pad across the upper back below the shoulder blades and take the handles.
- Start with a slight forward lean, hips heavy on the seat and ribs stacked.
- Press backward into the pad by extending the spine until the torso is upright or just past.
- Pause without cranking into a hard hyperextension at the top.
- Return forward under control and repeat without bouncing the stack.
Key technique cue
Extend only to a tall torso, no arching; move the stack smoothly.
Common mistakes
- ✕ Hyperextending the lumbar spine at the top instead of stopping near a tall torso.
- ✕ Using a hip thrust or a yank on the handles to move the stack.
- ✕ Letting the feet float so the hips slide and the erectors lose the load.
- ✕ Rushing the return and letting the weight stack slam.
Benefits
- ✓ Isolates the spinal erectors on a guided path with adjustable load.
- ✓ The seated setup is easier to coach than a 45-degree bench for new lifters.
- ✓ Light, controlled sets fit warm-ups and rehab-style lower-back work.
Progression: from easier to harder
- Step 1
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Step 2 You are here - Machine Back Extension
- 45 Degree Back Extension
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Step 3
About the exercise
The machine back extension is a seated isolation lift on a pin-loaded station. You sit with feet on the footplate, take the handles, and start with a modest forward lean. Extending the torso presses the upper-back roller backward so the erector spinae do the work while the hips stay seated. It is isolation work with the lower back as the primary group and the glutes as a helper. It is the selectorized sibling of a 45-degree hyperextension bench and suits posture accessory blocks.
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