Platesmith
Log it in Platesmith. The app shows last time's numbers on every set of Crunch, times your rest and tells you when to add weight. Free, with no ads.
Coming soon toiPhone
Coming soon toAndroid
Muscles worked
| Main | Rectus abdominis |
| Also | Obliques |
Setup
Short range done well beats long range done badly. The lower back stays on the floor.
How to do it well
- Curl the ribs toward the pelvis
- Exhale hard at the top
- Lower with control, shoulders never fully resting
Common mistakes
- Pulling on the neck
- Sitting all the way up with the hip flexors
Similar exercises
General guidance, not medical advice. Start lighter than you think, and check with a doctor first if you have a health condition or injury.