Stability Ball Back Extension

Also known as: stability ball hyperextension

Secondary muscles
Glutes, Hamstrings
Body part
Back
Position
Prone
Laterality
Bilateral (both sides together)
Category
Strength

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Draping your hips over a stability ball with feet braced against a wall turns a simple extension into a balance task, since the ball shifts under any uneven push from your legs. Against the fixed hyperextension bench, you trade load capacity for that stability work and a gentler setup.

How to do the Stability Ball Back Extension

  1. Place the stability ball on the ground and lie face down on top of it, with your hips resting on the ball and your feet against a wall or other stable surface.
  2. Position your hands behind your head or crossed over your chest.
  3. Engage your core and slowly lift your upper body off the ball, extending your back until your body forms a straight line from your head to your heels.
  4. Pause for a moment at the top, then slowly lower your upper body back down to the starting position.
  5. Repeat for the desired number of repetitions.

Tip: Keep the neck neutral and look at the floor a few feet ahead of you, not up at the ceiling.

Muscles worked

Primary

Spine · Back

The spinal erectors work both to hold the back in a rigid position and to bring the torso up, and you should feel a burn along both sides of the lower back.

Secondary

  • Glutes — The glutes drive the hip extension that lifts the torso, and rounding the upper back slightly with a pelvic tuck shifts more of the work onto them.
  • Hamstrings — The hamstrings assist hip extension and get more of a stretch the straighter your legs are on the pad.

Common mistakes

  • Hyperextending at the top — the goal is a straight line from head to heels, not an arch; stop when the torso is level with the legs.
  • Pad set too high — if the pad sits above the hip crease it blocks the hips from folding and forces the lower back to do all the bending; set it just below the hip bones.
  • Using momentum — swinging the torso up fast turns it into a bounce; take two or three seconds on the way down and lift smoothly.
  • Adding weight too early — bodyweight sets of 15 with a full pause at the top should feel easy before you hold a plate.

Where it fits in a workout

Back extensions are a good accessory after deadlifts or squats, or a stand-alone lower back builder on an upper body day. They pair well with a hamstring curl or a reverse hyperextension on adjacent equipment.

How many sets, how heavy and how hard: see what the ACSM position stands support.

Variations and alternatives

Similar exercises

Without stability ball

Easier and harder

When to talk to someone

  • Chest discomfort, feeling faint or lightheaded, or trouble breathing during or after exercise can be signs of a heart attack. In the US, call 911 right away; elsewhere, call your local emergency number.
  • Heart, metabolic or kidney disease, or symptoms like these when you are active: talk to your doctor before you start or step up training.
  • Pregnant: ask your obstetric care provider which exercise suits you.

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More exercises

Sources

  1. ACSM position stand on exercise quantity and quality (Garber et al., 2011)
  2. ACSM preparticipation health screening (Riebe et al., 2015)
  3. ACOG Committee Opinion No. 804 on exercise in pregnancy (2020)
  4. CDC: About Heart Attack Symptoms, Risk, and Recovery (2024)

Sources checked on October 17, 2026. Full citations are in the exercise library.

Animation and exercise data: ExerciseDB, licensed to SetGrip. General information, not medical or coaching advice.