Stealth Health: Get Healthy Without Really Trying - Web MD

"You can infuse your life with the power of prevention incrementally and fairly painlessly, and yes, doing something, no matter how small, is infinitely better for you than doing nothing," says David Katz, MD, MPH, director of Yale University's Prevention Research Center and of the Yale Preventive Medicine Center. Katz is also co-author of the book Stealth Health: How to Sneak Age-Defying, Disease-Fighting Habits into Your Life without Really Trying.

"If you let yourself make small changes, they will add up to meaningful changes in the quality of your diet, your physical activity pattern, your capacity to deal with stress, and in your sleep quality -- and those four things comprise an enormously powerful health promotion that can change your life," says Katz.

And yes, he says, a nap on the couch can be a health-giving opportunity -- particularly if you aren't getting enough sleep at night.