Back Extension

Which muscles does it train?

Equipment needed

How to perform it

For strength, 3 to 5 sets of 2 to 5 reps with 3 to 5 minutes of rest are common. For hypertrophy, use 3 to 4 sets of 6 to 10 reps with 2 to 3 minutes of rest.

Execution and technique cues

• Set the pad of the back extension machine just below the hip bones so the hips can hinge freely. Cross the arms over the chest or hold a weight plate against the body.
• Maintain a neutral spine and lower the torso under control until the hip is fully flexed, without rounding the lower back.
• Extend the hips by actively squeezing the glutes and raise the torso back to a horizontal position. Do not hyperextend past horizontal.
• Briefly hold the top position, then lower the torso again under control, avoiding any passive drop into the bottom.

Common mistakes

• Raising the torso beyond horizontal and forcing the lumbar spine into hyperextension at the top of each rep.
• Rounding the lower back at the bottom of the movement instead of maintaining a neutral lumbar curve throughout the full range.
• Driving the movement primarily with the hamstrings rather than actively extending the hip through glute contraction, which reduces stimulus to the target muscles.

Frequently asked questions

Does the back extension primarily train the lower back or the glutes?

Muscle emphasis depends on foot position and execution intent. Externally rotated feet and an active glute squeeze at the top shift emphasis toward the glutes. A neutral foot position with focus on spinal erectors places greater demand on the lower back musculature.

Can the back extension be performed with added weight?

Yes. Once bodyweight reps feel manageable, a weight plate can be held against the chest. Load should be selected so that technique does not break down and the spine remains neutral throughout.

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