There are ways to get fit without spending anything and by doing little things. Wonder what I'm talking about? I'm talking about biking. Fight fat, not traffic, on your way to work, and you'll earn a big bonus for your body. Women who walked or biked to the office regularly about 17 minutes each way lasted significantly longer sprinting on the treadmill than those who drove, according to the researchers at the University of North Carolina at Chapel Hill. "Every active thing you do helps keep you in shape," says lead study author Penny Gordon Larsen, Ph.D.If your rek is too long to hoof it, get extra exercise in chunks of at least 10 minutes during your 9 to 5. Take a lunchtime stroll or set up walk-and-talk meetings to reap a healthy payoff.