I started walking for exercise a little over five years ago at age 46. I wasn't overweight, but I was way out of shape. My wife and I traveled to Hawaii, and I about stroked out on a long hike, then my father dropped dead from a heart attack a week after our return. I got my wake up call, and started walking, working up to what I do pretty consistently (with dog), a 3.2 mile loop in 34 minutes +/-. I can't run consistently because of a surgically repaired knee, but walking at speed provides a similar workout without the pounding of running. I lost some weight, increased my fitness, then started cycling a couple of years ago. Now I mix up walking and outdoor riding (nice weather) and stationary bike and rollers (foul weather).

Let's keep the thread going!