Photograph by Henn Photography/cultura/Corbis
<p>Last year, Americans spent $21.4 billion on health club membership fees and personal training, according to the International Health, Racquet & Sports Club Association. It's probably money well spent. "You want to lose fat weight, not muscle weight," says Lehman College's Schoenfeld, who recommends that you find a trainer certified by the National Strength Conditioning Association or the American College of Sports Medicine. "Personal training is still the Wild West," Schoenfeld says. "You could end up with an out-of-work lawyer."
$43: Average monthly price of a gym membership -- IHRSA
$65: Average hourly price of a personal training session -- National Board of Fitness Educators</p>