Exercise makes me ravenous, I&#x27;m certainly not the only person for which that is true. Swimming is the worst offender, IME. I can be vigilant, but even knowing that I didn&#x27;t burn enough calories to counterbalance that meatball sub I want to get after my workout, doesn&#x27;t help all that much in keeping me from actually buying it anyway.<p>This is similar to the problem of calories in = calories out.  Dieting isn&#x27;t a chemistry equation where you just need the numbers to balance it, it&#x27;s psychology and in some cases physiology (leptin levels, etc), and that part of it is tricky.