Leg Extension Crunch (with Stability Ball)
Perform the Leg Extension Crunch on a stability ball to engage your core and lower body muscles effectively.
- Begin seated on the stability ball with your feet flat on the floor.
- Lean back slightly, keeping your back straight and core engaged.
- Extend one leg out in front of you while simultaneously crunching your torso forward.
- Return to the starting position and repeat on the other side.
How to perform the Leg Extension Crunch (with Stability Ball)
- Set up. Set up in a stable, balanced starting position appropriate for the Leg Extension Crunch (with Stability Ball) using your stability ball.
- Brace and execute. Brace your core, control the descent, and move through a full pain-free range of motion while emphasizing your quadriceps.
- 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 quadriceps 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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