Crunch (straight leg-up)
Perform the crunch with your legs straight up in the air to engage your core effectively.
- Lie on your back with your legs extended straight up towards the ceiling.
- Place your hands behind your head or crossed over your chest.
- Engage your core and lift your upper body towards your legs, squeezing your abdominal muscles.
- Lower back down with control and repeat for the desired number of repetitions.
How to perform the Crunch (straight leg-up)
- Set up. Set up in a stable, balanced starting position appropriate for the Crunch (straight leg-up) using your body weight.
- 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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