Who's the fat guy ?
Is he a project of yours coach ? it would be pretty smart business for you to show you could actually get somebody in shape too, not just athletic and sports performance
We have a lot of general clientele that come for various goals, weight loss, etc. but unless we're dealing with obese clients, when they see fat drop and body composition change they quickly (and happily) understand there's more to "weight loss" than just what's on a scale. Any one can "lose weight".