The men behind Frog Fitness know they have some convincing to do. The "Frog," a piece of mobile fitness equipment, is a peculiar-looking contraption. Users are down on all fours with their feet in ...

Brent Feland, an exercise science professor at BYU, demonstrates The Bullfrog, a new piece of exercise equipment. (Dani Jardine) It was a subject of curiosity for students who happened to be passing ...