Core exercise that targets legs, hips and core. Starting with a small resistance band around the balls of the feet, laying on the back with legs in a table top. Ground the shoulders, arms and head to the mat. Inhale to extend one leg, pushing into the band. Exhale pull the leg back to starting position. Alternate sides. Watch that the tailbone does not tuck under. Watch that the shoulders and head do not lift or pull off the mat.