Step by step instructions, muscle activation and variants for the Crunch.
The floor crunch is the foundational bodyweight abdominal exercise. Lying on your back with knees bent, you curl your upper back off the floor using your abdominals, keeping the movement short and controlled to maximise tension on the rectus abdominis.
Common mistakes content is coming soon.
The Crunch is a foundational movement that builds strength and muscle through controlled, progressive overload. Train it 1 to 2 times per week with 3 to 5 working sets per session, gradually adding weight or reps as form holds up.