Exercise guide · Intermediate · Compound

Stability Ball Crunch (Full Range Hands Behind Head): How to Do It & Muscles Worked

The stability ball crunch (full range hands behind head) is an abdominal exercise performed on a stability ball, targeting the abs and engaging the hip flexors as secondary muscles.

Primary muscles
Abs
Secondary muscles
Quads
Equipment
Stability Ball
Level · type
Intermediate · Compound
Demonstration of the stability ball crunch (full range hands behind head)
Front view: muscles worked by the stability ball crunch (full range hands behind head). Primary: abs. Secondary: quads.
Back view: muscles worked by the stability ball crunch (full range hands behind head). Primary: abs. Secondary: quads.
Primary Secondary

How to do the stability ball crunch (full range hands behind head)

  1. Step 1: Sit on the stability ball with your feet flat on the ground and your knees bent at a 90-degree angle.
  2. Step 2: Place your hands behind your head with your elbows pointing outwards.
  3. Step 3: Engaging your abs, slowly curl your upper body forward, bringing your chest towards your knees.
  4. Step 4: Pause for a moment at the top, then slowly lower your upper body back to the starting position.
  5. Step 5: Repeat for the desired number of repetitions.

Sets, reps and programming

Suggested sets, reps and rest for the stability ball crunch (full range hands behind head) by training goal
Goal Sets Reps Rest Effort
Strength 3–5 3–6 3–5 min 1–3 reps in reserve
Muscle growth 3–4 6–12 2–3 min 1–2 reps in reserve
Muscular endurance 2–3 12–20 1–2 min 1–3 reps in reserve

Ranges follow the ACSM position stand on progression in resistance training. Muscle grows across a wide range of loads when sets end close to failure (Schoenfeld et al., 2017), longer rests between heavy sets support strength and size (Schoenfeld et al., 2016), and stopping a rep or two short of failure works about as well as training to failure (Grgic et al., 2022). Estimate your working weights with the strength calculators.

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