Nah, as long as you can do the mobility tests adequately (in my case that was kneeling down and standing up again and twisting my body round, really basic) and your blood pressure isn’t too high you’ll be fine. He didn’t even mention my BMI and it’s pretty, cough, *generous*. Blood pressure being neither too high nor low seems to be the major concern even once you are in, for some bizarre reason they don’t seem to want people who might pass out when on their own in the middle of nowhere. Honestly, unless you can barely walk you’re so fat it’s nothing to worry about.