Would you eat a double cheeseburger if you knew it took two hours of walking to burn it off? Participants in a new study said, hmm, maybe not. The researchers say that exercise-based labels could do a better job than calorie counts at steering people to healthful choices.
"What's good for the heart is good for the brain," one neuroscientist says. In addition to physical exercise, researchers say mental exercise, socializing and a good diet can help preserve memory.