Slack Off for More Energy

Been trying to overcome the irresistible force of couch gravity, but just don't have enough giddy-up to go? No, you don't need a personal trainer -- or a workout that makes you sweat more than a tubful of ice in Honolulu. Instead (slackers, rejoice), light, easy exercise may do more for your energy levels than the hard-core stuff.

The evidence: When nonexercisers do low-intensity workouts -- like light pedaling on a stationary bike for 30 minutes three times a week -- tired-all-the-time feelings are reduced by as much as 65%. And it takes only 6 weeks of light workouts for you to feel pepped up. Moderate-intensity workouts boost your energy levels, too, but not as much.

You don't need a bike or a gym. Just put on your walking shoes and a watch (clothes are good, too) and time yourself for 30 minutes. Paying attention to time is more important than obsessing over how many miles, steps, or blocks you've walked because it keeps you from pushing too hard or going too slow if you've over- or underestimated the distance.

So what's the explanation for the better energy boost you get from easygoing activities? If you're out of shape, vigorous workouts tone you up but also tire you out. So if you're just trying to get off the couch, start slowly. When whatever you're doing starts to feel too easy -- you'll know -- that's when it's time to kick things up a notch.