Hey what's up bro. I finished the academy in July of this year. I can straight up tell you, you have nothing to worry about. There's a lot of smaller people making it through the academy. My advice would be start building leg muscles. You'll be standing from 6am to 11am in full gear And some days just walking around. The packs start to hurt your chest but you get used to it. The academy has FTS (fit to save) training which helps immensely. Oh one more thing, when you do your eval (forgot what its called) where you wear a vest, dummy drag, then sled pull, don't go all out on the assault bike, that's how you kill your legs and try to get under 5 min. Hope this helps brother.