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"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Looking for a low-impact way to get your heart rate up, without braving bad weather or sacrificing ...

If you want a really good workout, you shouldn't just be sitting around. That's at least part of the thinking behind the Martoni Cardio Speeder, a seatless exercise bike that puts the user in what its ...

This fast-running workout of the week, mixed with upper-body calisthenics, pushed our running to new limits. We let a few high-level soccer players do one of their running workouts, such as the ...