Tuck-ups
- Basic
- Bodyweight
Knees to chest without momentum
Muscles worked
- Primary:
- Core
How to do it
- Sit propped with the legs extended and the torso leaning back.
- Bring the knees to the chest while crunching the trunk in.
- Extend again under control.
Common mistakes
- Dropping without control on the extension phase.
- Resting the feet on the floor between reps.
Tips
- An easier version than V-ups.
- Keep tension in the abs through the whole range.