Add Yahoo as a preferred source to see more of our stories on Google. IF YOU can't stand waiting for a rack to open up at the gym but don't have space to fit one at home, you're not alone. What if we ...

Venture into any commercial gym during peak hours, and you'll likely see the same thing. Row after row of empty treadmills, stair climbers, and elliptical trainers. Meanwhile, crowds of people are ...