I like to keep things extremely simple when it comes to
fat loss. The less things to trip over the better.
That said, trying to zero in on a 500 calorie deficit can drive ya nuts. Reason being: You are dealing with a lot of assumed/estimated variables.
I'm very much a utilitarian and value simplicity above all else. With that said, I'd just as soon not worry about calculating the nitty gritties of caloric expenditure and simply establish a deficit off of an assumed maintenance.
We have two major factors; exercise and
nutrition.
With exercise, set the level at some sane amount. Weight training will be pretty *static* with something like 2-4 sessions per week.
Cardio will be more unique to the individual circumstance, but I'd start with a minimum of 3 sessions per week and go up from there as needed.
In terms of
nutrition, assume a maintenance of 14ish
calories per
pound and base your deficit off this. Start at 10
calories per
pound and track your progress. Assuming you've been consistent with caloric adherence, if the metrics you use to determine success aren't heading in the desired direction, tweak from there.
For instance, you might have to drop cals down a bit from this point. Or you might need to bump up your frequency of
cardio.
Basically, as I like to say, it's a touch & feel process. Trying to be very precise with your calculations can be very nerve-wracking. It would be one thing if your metabolism was a static phenomenon. But it's not. You're aiming at a moving target with bullets of varying sizes.