Take 10 Years Off Your Heart

Brisk walking can actually reverse the aging of your ticker, reveals a yearlong Washington University study of overweight 50- to 60- year olds. Those who walked off 240 to 300 calories a day (about 45 to 60 minutes at a brisk pace*) lost an average of 22 pounds without dieting, and their hearts pumped blood and nutrients as efficiently as people in their 30s and 40s.

*Calorie burns based on a 150 pound person.