I'm not sure what the new "Summary" block is for but it's nice to be able to sign in only once! This series hits the lats, hams, abs/core/balance. Nothing earth shattering but it works well together. Start lying supine (face up) on tability ball, tubes anchored over head. Like this, only I have narrower arms and pull towards chest. http://www.youtube.com/watch?v=GA91EAiewPw After doing those, keep arms close t chest. Straighten and bend knees for ham curls. Complete those, keep hands near chest and roll back to crunch position and do crunches w/ tube resistance. I doubled up the tube for the lats/hams and then used singles for the crunches. It's major core/balance to keep yourself from being pulled off the ball.