Core · Bodyweight
Knee Touch Crunch
How to do the knee touch crunch, the muscles it works, and the mistakes to avoid. Pulled straight from the Kovo app's exercise library.
- Equipment
- Bodyweight
- Difficulty
- Beginner
- Logged as
- Reps
- Movement
- Flexion
- Mechanic
- Isolation
How to do it
Lie on your back with your knees bent and feet flat on the floor. Curl your shoulders up and reach your hands forward to touch the tops of your knees, then lower back down under control.
- 1Your upper abs contracting as you curl up
- 2A firm squeeze at the top as your hands reach your knees
- 3A slow, controlled lower back to the floor
Common mistakes
- Pulling on your neck or leading with your head
- Bouncing or using momentum to reach
- Lifting your feet or jerking your torso up
Muscles worked
The knee touch crunch mainly works the upper abs and lower abs, with the obliques assisting.
- Upper AbsPrimary
- Lower AbsPrimary
- ObliquesSupport
- QuadsMinor
- Hip FlexorsMinor
Kovo programs the knee touch crunch for you and tracks it every session.
We build your whole program, drop the right lifts into each workout, and adjust your weights as you get stronger. Free on iOS and Android.
More abs & core exercises
- How to do the ab wheel rollout
- How to do the ankle tap plank
- How to do the ankle taps
- How to do the resistance band dead bugs
- How to do the resistance band pallof press
- How to do the rollout
Last reviewed June 2026.