I'll just add that if a criterion is not important/critical enough for you to enforce, I would not list it as such.
Maybe the others and then ask the sponsored athletes contribute to other parts of the board as their time and schedule permits.
"Look son, there comes a time in every man's life when he has to make a decision. Do you want to be big, powerful, jacked, yoked-up, have women everywhere want you and men fear you . . . or do you want to do crossfit?"