Ab challenge - Medicine ball twist (abs, obliques)

Stand with feet shoulder-width apart, knees slightly bent, abs engaged, holding ball with arms extended at chest height in front of you. Bend arms slightly and rotate torso through your waist to one side, then to the opposite side. Repeat for both sides until you have met your desired amount of reps.

Photography: Dave Laus

Workout/words: Nichelle Laus

Model: Katie Wilmshurst