On 11/29/2011 3:14 PM, Deux wrote:
On Tue, 29 Nov 2011 16:35:25 +0000, Doug Freyburger wrote:

Deux wrote:

I'm not doing the Atkins diet but I have a question that people here
might know the answer to.

A couple of days ago I did a lot of endurance exercise that probably
burned 4,000 kcal. Even though I had a meal high in carbs before I
surely must have burned some fat.

That's a *VAST* amount of endurance exercise. Running a marathon can
easily take around 3500 calories so less than what you burned. The fact
that you did an amount of endurance exercise at least as much as a
marathon is key here. I'll call it a marathon for most of the rest of
my response.

Thanks for the response.

I see now that my guess of 4,000 was rather optimistic. It was probably
something around 2,100 and it was from 33 miles of cycling (230 lbs @
15mph = 966kcal/hour x 2.2hrs = 2125)


At 230 lbs running costs abou 165 kcal/mile. Cycling uses about 1/5 of that.
So my guess is more like 1100 kcal to cycle 33 miles.