It’s a faceoff between the stability ball knee tuck and the lying leg raise.

Hanging knee tucks on a pull-up bar look deceptively easy, but they worked my core, strengthened my upper body and were the workout challenge I was after.

Shilpa’s challenging core exercise Shilpa Shetty recently took to Instagram to show how to do one of the challenging core exercises - hanging leg raises combined with knee tucks.

UNCASVILLE, Conn. (AP) Connecticut Sun rookie forward Morgan Tuck will miss the rest of the WNBA season because of a left knee injury.