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Handler
Exercise database

Back Extension

Back Extension is an intermediate hip hinge exercise that primarily trains the glutes and hamstrings, with the erectors and core assisting. Equipment: back extension machine.

Library data updated IntermediateBack extension machine

What this page is: structured data from Handler's own exercise library — the same cues, mistakes, ranges, and modifications the coach uses in the app. It is general exercise information, not an individual technique assessment or medical advice. Stop any movement that causes pain and seek qualified coaching or clinical care for injuries.

Demonstration loop from Handler's exercise library. Only the still frame loads until you press play.

Technique

Form cues for the back extension

  1. 01

    Push your hips back like you are closing a car door.

  2. 02

    Keep the ribs stacked over the pelvis and brace before each rep.

  3. 03

    Feel tension in the hamstrings, then drive the hips through.

  4. 04

    Fold at the hips and come up until your body forms one line.

Troubleshooting

Common mistakes

  • Squatting instead of hinging.

  • Rounding the low back under load.

  • Letting the weight drift away from the body.

Programming defaults

Sets, reps, and rest by goal

These are the starting ranges Handler's library assigns to the back extension for each training goal. They are defaults the coach adjusts from your logged sets, not a prescription for any individual.

GoalSets × repsRest between sets
Strength4 × 5–8 reps2 min
Hypertrophy3 × 8–12 reps1 min 15 s
Fat loss3 × 12–18 reps45 s
General fitness3 × 8–12 reps1 min

Between sets

  • Shake out your grip and rehearse the hip-back position.
  • Start the next set only when your brace feels sharp.

Working around discomfort

Modifications by body area

How Handler adjusts the back extension when a lifter reports a sensitive area. These are training modifications, not treatment. Pain that persists or worsens needs clinical assessment.

Lower back
Reduce load, brace before each rep, and stop if you cannot keep a neutral spine.
Hip
Use a comfortable stance and shorten the range if the front of the hip pinches.

Progression chain

Easier and harder variations

Regress to

Progress to

This is the most demanding step in its chain.

Questions about this exercise

What muscles does the back extension work?
The back extension primarily works the glutes and hamstrings. The erectors and core work as secondary or stabilising muscles. In Handler's library it is classified as a hip hinge movement.
What equipment do you need for the back extension?
You need back extension machine. It is programmed in commercial gym, small gym setups where that equipment is available.
How many sets and reps of the back extension should I do?
Handler's default for a strength focus is 4 × 5–8 reps with about 2 min rest, and for a muscle-building focus 3 × 8–12 reps with about 1 min 15 s rest. These are the library's starting ranges, not an individual prescription; the coach adjusts them from what you log.
Is the back extension suitable for beginners?
It is tagged intermediate. A simpler starting point in the same progression chain is the leg curl machine hip bridge.

More glute exercises

Invited TestFlight beta · iPhone-first

Let the coach program the back extension for you.

Handler is our product. In the invited iPhone beta, the coach places exercises like this one into your plan, sets the starting ranges shown above, and adjusts them from the sets you log. Test build, not a public download.

Request beta access