Some people think fitness needs to be complicated. (Just ask Liz why she thinks fitness is stupid.) But sometimes, the simplest activities are best. Walking -- perhaps the simplest activity of all -- has long been touted as a good activity for helping you maintain a healthy weight, reduce stress and reduce the risk of conditions such as cardiovascular disease. Research now suggests that a walking program can help reduce pain associated with peripheral arterial disease (PAD).

Even if you don't have a condition such as PAD, walking can make a big improvement in your health. You can use it as an occasional break from your more intense workouts or walking can be your exercise of choice.

Are you a walker? What changes has walking made in your fitness and in your life?