Chiming in to contribute that I was a serious, year-round competitive swimmer for years and you can't even imagine how hungry that sport makes you - I mean, it's like massive hunger pangs after practices (we swam twice per day every single day all year-round with meets every weekend day and night.) We were all basically famished all the time and ate huge amounts of food, whether we were male, female, short, tall, young, old(er,) probably in the thousands of calories per day. I know of no other usual sport that even compares as far as stimulating appetite. I would wager this is a well-known phenomenon when it comes to competitive swimming specifically.
OVERALL WEIGHT LOSS
WORKING OFF REGAIN