It promises nothing less than a fitness miracle: Just four minutes is supposed to equal a full cardiovascular and weight-lifting workout - all done on a strange-looking machine that even Mike Dunaisky ...

Like many other exercise machines that assure a quick fix for the exercise-challenged, the Range of Motion promises a complete workout in a few minutes four to be exact. Sound too good to be true?

RECENTLY, I DROVE TO a nearby strip mall to visit my local Quick Gym USA. The place is the size of a Wendy’s and about as smartly decorated, with a plastic fern at the entrance. Behind it are four ROM ...