Time to get out the stability ball!
Lie on the stability ball. Put your hands on the floor and position the ball so it’s under your hips/stomach. Extend your legs so your toes can rest on the floor.
Keeping your back straight and your legs together, lift your legs off the floor. Lift until they are parallel with the floor.
Hold for a couple seconds then lower them back down.
(A great exercise for your lower back, glutes, and hamstrings.)