Lyn Lamoure runs calisthenics during a Cardio Tennis class at Davis Senior High School in Davis, Calif. Perhaps you should consider Cardio Tennis. It’s not your leisurely recreational court game.

WATERLOO -- One half of the indoor tennis court looks like a frantic doubles match on an agility course. But there's no opponent and no score. Instead, tennis balls fly, raquets swing and feet ...

If your weekly schedule looks like a jigsaw puzzle, squeezing in both cardio and strength training can be tough. Instead of making cardio feel like yet another looming item on your to-do list, let's ...