The Wide-Legged Criss-Cross exercise works your rectus abdominis, obliques, transversus abdominis, and inner thighs.
Next is wide leg crisscross. Take a block between the thighs. Extend through the feet and squeeze the block. Interlace hands behind the back. Elongate the elbows out to the sides. At first center, lift up both shoulder blades, exhale, twist left to right, back to center, and then right to left, center. Use the exhale, center and center.