Re: calories burned walking 18 holes
Originally Posted by
sacm3bill 
That's not true. The more you weigh, the more force is exerted by your muscles with every step you take.
I'm sorry, but it is. I've not said that it requires NO extra effort, I've said it requires LITTLE extra energy.
Originally Posted by
sacm3bill 
When you work out, your muscles are what get bigger/stronger - your muscles are what's applying the resistance against the force of gravity (or the free weights), not your bones.
That doesn't even make sense. You're comparing an activity done to specifically target muscles with carrying something that's designed to be carried in order to minimize its impact on muscles? We don't stretch our arms out in front of us and carry the golf bag in our outstretched hands. That would offer no skeletal support. We carry our bags the way we do specifically to use our skeletons and to minimize the effort.
Look at the women in Africa that carry two things of water on a stick over their shoulders - they're using their skeletons. Yes, the initial lifting requires effort, but after that significantly less effort is required to move horizontally. Or the ones who put baskets of rice on their heads. Skeletal support. Why do you think we have skeletons - to do this sort of stuff.

Originally Posted by
sacm3bill 
The house analogy is not a good one. Houses remain standing for the same reason we don't sink into the ground when we lay down. Once we stand up though, we are actively applying force (read: burning more calories) to remain standing, to balance, to walk (whether up hills or on flat terrain), etc.
I can stand still without having to "use" my muscles. So can you.
Originally Posted by
jamo 
That houses analogy makes sense for standing still, but walking is different. I would guess it would be several times the 100 number. More like 300-400. But then again, I haven't done the experiment, they did.
Exactly - you're wrong.

Walking with weight does not significantly add to the amount of energy needed.
You guys are arguing when there's a study right there that backs up what I'm saying. 100 extra calories... the added weight is a bigger factor when a) you pick up and set the bag down, and b) you go up a hill. The horizontal movement while carrying requires significantly less energy than those two acts.
The article backs up the physics (and vice versa). I'm done.