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  5. Core & Abs
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  7. Resistance Band Bosu Ball Single Leg Balance

Exercise guide

Resistance Band Bosu Ball Single Leg Balance

  • Intermediate
  • Compound
  • Rep-based
  • Lower legs
  • Upper legs
  • Waist

This exercise combines an unstable surface with lateral resistance to maximize core stability and lower body proprioception. It forces the glutes, obliques, and ankle stabilizers to work together to maintain an upright posture against an external pull.

Reviewed by the Crucible Fit team · Updated June 2026

Watch the Resistance Band Bosu Ball Single Leg Balance demonstrationVideo and instructions for every movement are in the Crucible Fit app.

Muscles worked

Primary

  • Abs
  • Calves
  • Hamstrings
  • Obliques

Secondary

  • Adductors
  • Erector spinae

Equipment

  • Resistance band

Setup

  1. Place the Bosu ball flat-side down on a level surface.
  2. Anchor a resistance band to a stable post at chest height, positioned to your side.
  3. Step onto the center of the Bosu ball dome with the foot closest to the anchor point.
  4. Grasp the band handle with both hands and hold it against the center of your chest.

How to do it

  1. Lift your outside leg off the Bosu ball, finding your balance on the standing leg with a soft knee bend.
  2. Exhale as you press the band straight out in front of your chest, resisting the band's pull toward the anchor.
  3. Inhale as you slowly bring the hands back to your chest while maintaining a perfectly level pelvis.
  4. Perform the prescribed duration or repetitions before switching sides to face the opposite direction.

Form checklist

  • Keep the standing knee slightly bent; do not lock the joint.
  • Ensure the hips remain level and do not 'hike' or drop to one side.
  • Maintain a tall spine with shoulders pulled back and down.
  • Keep your gaze fixed on a stationary point at eye level to assist with balance.

Pro tips

  • Squeeze the glute of the standing leg as hard as possible to create a stable base for the pelvis.
  • Focus on 'gripping' the Bosu ball with your toes to activate the intrinsic muscles of the foot and ankle.

Make it harder

  • Increase the resistance of the band or stand further away from the anchor point.
  • Incorporate small overhead raises with the band while maintaining the single-leg balance.

Frequently asked

What muscles does the resistance band bosu ball single leg balance work?
The resistance band bosu ball single leg balance primarily targets the abs, calves, hamstrings, and obliques, and also works the adductors and erector spinae as secondary muscles.
What equipment do you need for the resistance band bosu ball single leg balance?
The resistance band bosu ball single leg balance uses resistance band.
Is the resistance band bosu ball single leg balance good for beginners?
The resistance band bosu ball single leg balance is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.

Related exercises

  • Bear Plank Floating MarchIntermediate · abs, calves, deltoids, hamstrings, and obliques
  • Bosu Ball Step-Up High Knee Air TwistIntermediate · abs, calves, glutes, hamstrings, obliques, and quadriceps
  • Plank Walk SquatIntermediate · abs, calves, glutes, hamstrings, obliques, and quadriceps
  • Squat To Overhead Reach With TwistBeginner · abs, calves, glutes, hamstrings, obliques, and quadriceps

Train it with Crucible Fit.

Every movement in this library is in the app with video and instructions, ready for your own sessions on the days between Crucibles. Your first Crucible is on us.

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