One thing I would like to add that even though I mentioned I gave up athletics I played serious rugby in college. My junior year of college we won the Division 2 Virginia State Championships, and I was a full time starter. I do not think I sat out a single minute that season.
And this just proves to the younger guys that you can get bigger even while playing a sport seriously. And rugby probably involves more cardio than any other sport, 90 minute games and the clock only stops at half time for 10 minutes. You gotta eat!!