"Brexercise" is a hit.
Peloton, the seven-year-old maker of interconnected exercise machines, could go public in the coming year.
An array of gadgets will track your fitness program, tell you in great detail how many calories you're burning, and what your heart rate is. They can even give you a kick when you are falling short of your goals.
Plenty of Americans will resolve to get in shape with the help of a personal trainer in 2013. But the personal training field is unregulated, and clients may not always know what they're getting.