You can't really do that though. I mean at a high level, yeah a poor diet and little exercise will almost certainly lead to an adult gaining weight. But it sounds like you're describing the possibility of calculating his expected weight gain based on how much he ate and how much he exercised, and I don't think that's possible. Not to mention that it's been widely reported (iirc even from Spurlock himself) that he was drinking alcohol heavily during this period, which will further complicate this calorie-level reconcilation you're suggesting.
> But it sounds like you're describing the possibility of calculating his expected weight gain based on how much he ate and how much he exercised, and I don't think that's possible.
Why? To a large extent this is possible, and with a bit of experience in how a specific person reacts, it's possible to do this very accurately. Bodybuilders will often have very specific meal plans over months, and know more-or-less exactly how much weight they will gain or lose, sometimes down to the week.
> it sounds like you're describing the possibility of calculating his expected weight gain based on how much he ate and how much he exercised, and I don't think that's possible.
This is a joke right? This is exactly how you calculate expected weight gain/loss.
If you can do this accurately for an arbitrary person, you will be the world's most celebrated dietician so I encourage you to go ahead and publish exactly how you're doing this.
