How to Do Crunch (Legs On Stability Ball)

Crunch (Legs On Stability Ball) is a core exercise using stability ball, listed as beginner in the A90 Training Club catalogue.

Primary muscle

Core

Equipment

Stability ball

Difficulty

Beginner

01 / Move with control

How to perform

How to do Crunch (Legs On Stability Ball)

  1. 01Lie flat on the floor and place the calves and heels on top of a stability ball with knees bent at 90 degrees.
  2. 02Place fingertips lightly behind the ears or across the chest to avoid pulling on the cervical spine.
  3. 03Exhale and lift the shoulder blades off the mat by contracting the upper abdominals.
  4. 04Keep the lower back pressed into the floor while reaching the ribs toward the pelvis.
  5. 05Inhale as you lower the upper back down to the floor with control.

Same guidance shown inside the A90 app

02 / Anatomy

Muscles worked by Crunch (Legs On Stability Ball)

Primary Stabiliser Inactive

Tap to explore manually

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

Press the heels firmly into the stability ball to engage the hamstrings, which helps neutralize the hip flexors during the trunk flexion.

Same coaching engine used inside the A90 app

05 / FAQ

Crunch (Legs On Stability Ball) questions

What muscles does Crunch (Legs On Stability Ball) work?

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

How do you do Crunch (Legs On Stability Ball) correctly?

Lie flat on the floor and place the calves and heels on top of a stability ball with knees bent at 90 degrees. Place fingertips lightly behind the ears or across the chest to avoid pulling on the cervical spine. Exhale and lift the shoulder blades off the mat by contracting the upper abdominals. Keep the lower back pressed into the floor while reaching the ribs toward the pelvis. Inhale as you lower the upper back down to the floor with control.

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

Press the heels firmly into the stability ball to engage the hamstrings, which helps neutralize the hip flexors during the trunk flexion.

Is Crunch (Legs On Stability Ball) suitable for beginners?

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

What equipment do you need for Crunch (Legs On Stability Ball)?

Crunch (Legs On Stability Ball) uses stability ball.

A90 Intelligence

Put this into a real plan.

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

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