Exercise library · Core
Crunch.
Basic ab exercise targeting upper rectus abdominis.
BeginnerBodyweight
The numbers
Sets
2–3
Reps
12–20
Rest
30–45
Muscles
Primary
Rectus abdominis
Secondary
Obliques
The play-by-play
How to do it.
- Step 01
Lie on back with knees bent
- Step 02
Place hands lightly behind head
- Step 03
Curl upper back off floor
- Step 04
Squeeze abs at top
- Step 05
Lower slowly
What separates good from great
Pro cues.
Avoid pulling neck
Small controlled range
Exhale as you crunch