Michael MacClancy writes:

On Fri, 16 Jul 2004 15:19:56 +0000 (UTC), LaoFuZhi wrote:

Two factors which will affect calorie expenditu power output (in watts)
and efficiency.

That's the bit I don't get... I thought the calorie expenditure would be
linked to the amount of work done.... i.e. move a certain weight over a
certain distance in a given time.....

But when you getter fitter you get more efficient, meaning you need less
energy to perform this task.

No, I'd say the main advantage in getting fitter is that you can
expend more energy at a given task, although possibly there is an
increase in efficiency as well.

A