FlexReverse Crunches
Muscles worked
- Rectus Abdominis
- External Oblique
- Iliopsoas
- CategoryCore
- Default target3 sets × 10–15 reps
- EquipmentBodyweight
- Movement patternCore
- Training stylesHypertrophy
- LevelBeginner-friendly
Technique
Setup
Lie on your back with arms at your sides, knees bent 90° and feet lifted off the floor.
Movement
Curl your knees toward your chest, lifting your hips off the floor, then lower slowly until your tailbone touches down.
Form Tip
Lift with your abs, not momentum — the slower the hips rise, the better.
Increase Difficulty
Straighten your legs more, or pause at the top.
Decrease Difficulty
Reduce the range, just tilting the pelvis without lifting the hips.
Hear the cue
The trainer's spoken setup and form tip for this exercise — the same clips Flex plays in a session.