How to do it
- Lie on your back with your arms by your sides and your palms on the floor.
- Lift your straight legs until they point straight up.
- Lower them with control until your heels are just above the floor.
- Raise them again without letting your feet rest.
Key cues
- Arms at your sides
- Legs straight
- Lower with control
- Lower back stays on the floor
Common mistakes
- Letting your lower back arch off the floor
- Bending your knees to lift
- Dropping your legs fast
- Resting your feet on the floor between reps
Muscles worked
- Primary
- Abs and hip flexors
- Secondary
- Obliques
Equipment
None.