How to do it
Press your bent-leg foot firmly into the floor for stability each rep.
- 1
Lie on your back with your knees bent and feet flat on the floor.
- 2
Extend one leg out straight just above the floor while keeping the other knee bent.
- 3
Hold the position briefly, then return to the starting position.
- 4
Alternate legs and repeat for the desired number of repetitions.
Expert tip
Keep your lower back pressed into the floor to prevent strain and ensure your core muscles are doing the work.
Common mistakes
- ✕Lifting the extended leg too high
- ✕Rushing reps without a pause
- ✕Bent knee drifting inward