in terms of getting and keeping fit?
Because I know quite a few people who seem to think that they will get fit and lose weight by going for several long walks in a week. I always thought that you needed to raise your pulse rate above a certain level so many times a week to improve your fitness. I rarely find my pulse rate increases when I walk. And I'm sure I read somewhere that the calories burned in walking for 20 mins isn't that much less than running.
But am I seriously wasting my effort running when a good walk would do the same. I've always walked everywhere and used, pre-DCs, to go for 10-12 mile walks most weekends. But I feel so much fitter now that I'm running regularly. Am I imagining it?