But is it good exercise ... Roller skating has an intensity rating of 7 metabolic equivalents (METs), making it comparable to group cycling or a moderate effort on the rowing machine (3).

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You sit in the seat, let your calves loop around the leg roller ... is an exercise designed to focus almost exclusively on your quads. Plenty of guys want big quads, which is why this machine ...

Not included: Awareness of the incontrovertible fact that you could have performed the very same workout that this machine offers for $0. Just stick your feet under the couch, hold a big rock ...

From ab rollers to benches ... Get washboard abs using Core Max’s efficient machine, designed to combine just eight muscle-burning exercises in less than ten minutes a day.