Lisa Lillien, "Hungry Girl" Yes, of course! Get in whatever exercise you can. To me, it's the same as people questioning others when they order a Diet Coke with their burger and fries. I'm actually all for that, too. This is a similar situation. In the case of the Diet Coke thing, do what you can to cut calories. And when it comes to being active, do what you can to stay in shape or keep your body moving, even if you can't get your heart rate up. Walking, even at a slow pace, is still good for you. (By the way, your takeaway here should not be to walk slowly and eat lots of fries.)

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Jonny Bowden, MA, CN, CNS
Absolutely. The whole heart-rate thing is so widely misunderstood anyway, especially the idiotic "fat-burning zone" stuff that some aerobic teachers are still preaching. But don't get me started. The point is this: Any exercise is better than no exercise. Moving the remote control beats sitting still. Getting up and changing the channel beats clicking the remote. Walking around the block beats both of them. Get my drift? A mile walk can still burn calories, increase circulation, lower blood sugar (and insulin) and make you feel good.