1
Lie supine on the floor with your back flat, arms extended by your sides with palms facing down, and legs extended straight out
2
Press your lower back into the floor to engage your core and stabilize your spine throughout the movement
3
Slowly lower both legs toward the floor in a controlled manner while maintaining a neutral spine, resisting the urge to arch your back
4
Drive through your core to lift both legs back up to the starting position without momentum, squeezing the abdominal muscles at the top