Well, let us look at it for just a moment...
There's wide variation in resting metabolic rates, but the mean is about 1500 kcal/day. (1 kcal = 1 "dietary" calorie)
If you raise that base rate by 1%, we're talking 15 kcal/day. Which doesn't sound like much. But, over the course of a week, that's about 100 kcal. When your base exercise is only burning a couple hundred calories at a shot, an extra 100 a week isn't negligible. It isn't like this is going to be the majority of anyone's loss, no. But if he can bump up the base metabolic rate by only 2%, it'll be like getting an extra workout in the week!
I feel like I've been dragged into a conversation I'm really not that interested in! I was just observing that 45 mins of walking isn't a whole lot of calories; I'm not invested enough for a whole side debate about the microdetails, I'm afraid! Sorry, man!
