Classic Crunch
🔺 Upper Abs · updated September 2026
⏱ 45 sec🔁 3 sets of 15📶 beginner🌿 low-impact
Targets: upper rectus abdominis
How to do it
- 1Lie on your back, knees bent, hands lightly behind your ears.
- 2Exhale and curl the ribcage toward the pelvis — shoulder blades just off the floor.
- 3Pause 1 second at the top, feeling the abs contract.
- 4Lower slowly. Don't yank the neck.
Form tips
- • It's a small movement — 30° up is plenty
- • Chin off the chest: keep a fist of space
- • Exhale up, inhale down
Common mistakes
- • Pulling the head with the hands
- • Sitting all the way up (that's hip flexors, not abs)
- • Fast bouncing reps
