How to Do Bent Knee Lying Twist (On Stability Ball)

Bent Knee Lying Twist (On Stability Ball) is a core exercise using stability ball, listed as intermediate in the A90 Training Club catalogue.

Primary muscle

Core

Equipment

Stability ball

Difficulty

Intermediate

01 / Move with control

How to perform

How to do Bent Knee Lying Twist (On Stability Ball)

  1. 01Lie supine on the floor with the stability ball gripped firmly between the calves and the back of the thighs.
  2. 02Extend the arms out to the sides in a T-position with palms facing down for leverage.
  3. 03Lift the legs until the hips and knees are at 90 degree angles with the ball held steady.
  4. 04Rotate the knees slowly toward the floor on one side while keeping the opposite shoulder pinned down.
  5. 05Contract the obliques to pull the ball back to the center before switching sides.

Same guidance shown inside the A90 app

02 / Anatomy

Muscles worked by Bent Knee Lying Twist (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 shoulder blades firmly into the stability ball to prevent the upper body from lifting as the knees rotate.

Same coaching engine used inside the A90 app

05 / FAQ

Bent Knee Lying Twist (On Stability Ball) questions

What muscles does Bent Knee Lying Twist (On Stability Ball) work?

Bent Knee Lying Twist (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 Bent Knee Lying Twist (On Stability Ball) correctly?

Lie supine on the floor with the stability ball gripped firmly between the calves and the back of the thighs. Extend the arms out to the sides in a T-position with palms facing down for leverage. Lift the legs until the hips and knees are at 90 degree angles with the ball held steady. Rotate the knees slowly toward the floor on one side while keeping the opposite shoulder pinned down. Contract the obliques to pull the ball back to the center before switching sides.

What is the A90 coach tip for Bent Knee Lying Twist (On Stability Ball)?

Press the shoulder blades firmly into the stability ball to prevent the upper body from lifting as the knees rotate.

Is Bent Knee Lying Twist (On Stability Ball) suitable for beginners?

Bent Knee Lying Twist (On Stability Ball) is rated intermediate in the A90 Training Club catalogue.

What equipment do you need for Bent Knee Lying Twist (On Stability Ball)?

Bent Knee Lying Twist (On Stability Ball) uses stability ball.

A90 Intelligence

Put this into a real plan.

A90 Intelligence programmes bent knee lying twist (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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