[wonnor]

>There is almost no amount of physical activity that can offset excess consumption.

Very odd statement to make without quantifying how much "excess" there is in the "excess consumption". If walking a couple extra hours a day on vacation burns (say) 500 calories, that's a pretty large buffer of extra food you can eat - a 20% increase if you're eating 2500 calories per day. But of course a determined glutton can out-eat this.

[lotsofpulp]

I was assuming the average person consumes more than 500 extra Calories, but you are correct.