Head For The Hills
Like many things that are good for you, hills aren't particularly appetizing. But the extra effort it takes to trudge up them is worth it: For each degree of incline, count on at least a 10 percent increase in calories burned, according to Jana Klauer, M.D., a nutrition and metabolism expert and research fellow at St. Luke's-Roosevelt Hospital in New York City. So running up a 5 percent grade (a gentle hill) will burn 50 percent more calories than running on a totally flat surface for the same amount of time.
LINKS: Women's Health