How to Do Crunch (On Bosu Ball)

Crunch (On Bosu Ball) is a core exercise using bodyweight, listed as beginner in the A90 Training Club catalogue.

Primary muscle

Core

Equipment

Bodyweight

Difficulty

Beginner

01 / Move with control

How to perform

How to do Crunch (On Bosu Ball)

  1. 01Position your lower back on the dome of the ball with feet flat on the floor.
  2. 02Place fingertips behind your ears or cross your arms over your chest.
  3. 03Exhale as you contract your abdominals to lift your shoulders away from the ball.
  4. 04Pause at the peak of the contraction for one second.
  5. 05Inhale as you slowly lower your upper back to follow the curve of the ball.

Same guidance shown inside the A90 app

02 / Anatomy

Muscles worked by Crunch (On Bosu Ball)

Primary Stabiliser Inactive

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Primary movers

  • Core Stabilises the spine and transfers force.

Stabilisers

  • Lower back Stabilises the spine during lifts and bends.
  • Forearms Grips and stabilises the wrist under load.

03 / A90 Coach

A90 Coach tip

Focus on shortening the distance between your ribs and hips rather than leading with your neck.

Same coaching engine used inside the A90 app

05 / FAQ

Crunch (On Bosu Ball) questions

What muscles does Crunch (On Bosu Ball) work?

Crunch (On Bosu Ball) is catalogued as a core exercise in A90 Training Club, with the core as its primary muscle group.

How do you do Crunch (On Bosu Ball) correctly?

Position your lower back on the dome of the ball with feet flat on the floor. Place fingertips behind your ears or cross your arms over your chest. Exhale as you contract your abdominals to lift your shoulders away from the ball. Pause at the peak of the contraction for one second. Inhale as you slowly lower your upper back to follow the curve of the ball.

What is the A90 coach tip for Crunch (On Bosu Ball)?

Focus on shortening the distance between your ribs and hips rather than leading with your neck.

Is Crunch (On Bosu Ball) suitable for beginners?

Crunch (On Bosu Ball) is rated beginner in the A90 Training Club catalogue.

Do you need equipment for Crunch (On Bosu Ball)?

No. Crunch (On Bosu Ball) is listed as a bodyweight movement in the A90 catalogue, so you can train it with no kit.

A90 Intelligence

Put this into a real plan.

A90 Intelligence programmes crunch (on bosu ball) into a 30, 60 or 90 day plan built around your equipment, then adjusts it as you train.

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