<p>This doesn’t really apply to you.. from what you’ve said, you’re not “fat,” or obese; you’re maybe considered overweight, but only due to your muscles. Therefore, you are in absolutely NO disadvantage(perhaps you might even be at an advantage for being good at sports).</p>
<p>However, if you were obese(i.e. you look like you sit in front of the computer 12 hours a day and never exercise), THEN you might face some discrimination. Personally, if I was an adcom, I would think “Doesn’t this kid care about his health? Is he really so stupid as to let himself gain all this weight?” about a kid who was obese.</p>
<p>But, you are not obese from what you have said, so you have nothing to worry about.</p>