Illustration of the Crunch: Only the shoulder blades leave the floor - chin off the chest, eyes at the ceiling.

isolation · Core

Crunch

Crunch is an isolation core movement for abs, using no equipment. 3 sets of 20-30, 1 min rest.

Primary muscle: Abs
Equipment: None — bodyweight
Difficulty: Beginner
Sets and reps: 3 × 20-30
Rest: 45s
Force: pull

How to do it

1
Set up
On your back on a mat, knees bent, hands crossed on the chest.
2
The cue that matters
Only the shoulder blades leave the floor - chin off the chest, eyes at the ceiling.
3
Work it
3 sets of 20-30, resting about 1 minute between them.