Pilates Roll-Up

" Pilates Roll- Up: Sit up tall with your knees bent, your legs hip-width apart, and hold your thighs -- your elbows stay wide. Roll down toward the mat, curl your pelvis under, and press your lower back into the floor. When your arms are almost straight, hold for 3 breaths. With every exhale, deepen the curl in your abs then roll back up to sitting. Repeat 3 times. This move works your transverse abdominals or the deepest layer of abs."