Ab challenge - Bent knee hip swing (abs - specifically the obliques)

Lie with arms out to the side. Flex the legs at a 90-degree angle with a medicine ball between the knees. Lower the knees to the right side, and then to the left. The shoulders and back should remain grounded throughout the movement. Repeat until you have met your desired amount of reps.

Photography: Dave Laus

Workout/words: Nichelle Laus

Model: Katie Wilmshurst