Crunch (on bosu ball)
Perform a crunch on a bosu ball to engage your core muscles effectively.
- Start by sitting on the bosu ball with your feet flat on the ground.
- Lean back slightly, keeping your back straight and core engaged.
- Lift your shoulders towards your knees, squeezing your abdominal muscles.
- Lower back down to the starting position and repeat.
How to perform the Crunch (on bosu ball)
- Set up. Set up in a stable, balanced starting position appropriate for the Crunch (on bosu ball) using your bosu ball.
- Brace and execute. Brace your core, control the descent, and move through a full pain-free range of motion while emphasizing your abdominals.
- 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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