B-stance Back Extension
A staggered-stance 45-degree back extension that loads one hip harder while the spinal erectors hold a neutral line.
How to do it
- Set the hip pad of a 45-degree back extension bench just below your pelvis.
- Place one foot flat on the platform and stagger the other foot behind it so the front leg carries most of the load.
- Cross your arms over your chest, brace your abdominals, and line up your head, spine and hips.
- Hinge at the hips and lower your torso until you feel the hamstrings of the lead leg lengthen.
- Drive the lead hip into the pad and extend until your body forms a straight line.
- Pause at the top, lower with the same tempo, then repeat and switch the lead leg.
Key technique cue
One leg does the work, the other only supports; keep the lower back flat.
Common mistakes
- ✕ Rounding the lower back on the descent, which moves load off the hips and onto passive spinal structures.
- ✕ Arching well past a straight line at the top, which compresses the lumbar spine and adds no useful range.
- ✕ Letting the trailing foot take an equal share of the load, which removes the unilateral bias entirely.
- ✕ Rushing the lowering phase, which cuts time under tension for the glutes and hamstrings.
Benefits
- ✓ Trains hip extension one side at a time so left and right differences surface and can be corrected.
- ✓ Builds isometric endurance in the spinal erectors without loading the spine with an external bar.
- ✓ Needs only a back extension bench, so it programs the same way in small gyms and large facilities.
Progression: from easier to harder
- Step 1
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Step 2 -
Step 3 You are here - B-stance Back Extension
- Dumbbell Back Extension
About the exercise
The B-stance back extension is a hip hinge performed on a 45-degree bench with one foot forward on the platform and the other offset behind it, so the lead hip takes most of the load. The hip pad sits just below the pelvis, which lets the hips flex and extend freely while the spinal erectors work isometrically to keep the spine in one line with the head and legs. Glutes and hamstrings drive the torso back up, and the staggered stance makes side to side differences in hip extension strength obvious. It is a unilateral posterior-chain option that needs no barbell.
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