Alternate Straight Leg Raise (on bosu ball)

Perform the alternate straight leg raise on a bosu ball to engage your core and lower body muscles.

  1. Begin by lying on your back on the bosu ball with your arms at your sides.
  2. Lift one leg straight up while keeping the other leg extended on the ground.
  3. Lower the raised leg back down without touching the ground and repeat with the opposite leg.
  4. Maintain a stable core throughout the movement.

How to perform the Alternate Straight Leg Raise (on bosu ball)

  1. Set up. Set up in a stable, balanced starting position appropriate for the Alternate Straight Leg Raise (on bosu ball) using your bosu ball.
  2. Brace and execute. Brace your core, control the descent, and move through a full pain-free range of motion while emphasizing your abdominals.
  3. Reset. Reverse the movement under control and reset between repetitions, keeping your form crisp on every rep.

Coaching cues

  • Move with intent — every rep should feel deliberate, not rushed.
  • Drive force through your abdominals rather than momentum.
  • Keep your breathing steady: exhale on the hard part, inhale on the reset.

Common mistakes

  • Using too much weight and losing positional control.
  • Cutting the range of motion short and missing the target muscle.
  • Letting your spine round or hyperextend instead of staying neutral.

Detailed cues, common mistakes, and demonstration video are available in the Fitly app.

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