A 15-Minute HIIT Ab Workout to Sculpt Your Core
Plus, after a few slams, you'll soon find out why they fit perfectly in a HIIT workout. Start by standing shoulder-width ...
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The Best Stomach Exercises for Stronger Abs
Hold a 5-pound medicine ball (or dumbbell) between both hands. Swivel left to the right and back. Bring the ball across your body while maintaining the V-shape. Do three sets of 15 repetitions ...