Quote Originally Posted by GearsMcGilf View Post
This makes me wonder if there might not be something to the theory of a "fat gene". Why do some of us struggle to keep weight on, yet some people can't get it off, short of going on a hunger strike?
no, I do believe in the "fat gene" but I think many use it as an excuse to just say fuck it, not exercise and eat shitty and just go with it vs doing everything they can to fight it (healthy lifestyle, etc.).

I have a sister 2 years older and our situation is similar to you and your brother. both of us lifetime athletes but she gains weight looking at food and I can take a couple years off eat, fast food, cake/ice cream every day and gain 5-10 lbs of fat. even when accounting just for my higher metabolism from substantially more LBM the differences in that aspect are great.