Crunch
This ab exercise mainly works your upper abs, with help from your lower abs and obliques. Watch the demo video, then follow the tips below.
Rep Range
Time Based
How to do Crunch
Lie on your back with knees bent, feet flat on the floor. Place hands behind the head or across the chest. Curl the upper body toward the knees.
Common mistakes
Avoid pulling on the neck. Ensure movement is initiated from the core, not the head or neck.
Breathing
Exhale as you curl up; inhale when lowering back down.
Muscles worked
Primary Muscles
Upper Abs
Secondary Muscles
Lower Abs, Obliques
