Ever look at someone and think, “Man, how many crunches does it take to look like that?” If you want to tone your abs, ...

Crunches, or V sit-ups ... 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.

Ever look at someone and think, “Man, how many crunches does it take to look like that?” If you want to tone your abs, crunches—which target the top part of the abs—can help. But if you ...