It's possible. Controlling for grit and time spent not resting, being the best at anything demands a significant time investment in that activity. If you had ju

It's possible. Controlling for grit and time spent not resting, being the best at anything demands a significant time investment in that activity. If you had just one hour a day, you could spend it either playing basketball or doing math. I'm not saying one is better than the other; just that if you do the former, you'll get better at basketball. If you do the latter, you'll do better at math. (I'm fully aware of studies that show that being athletic leads to sharper mind and better neuronal circuitry. But moderate physical activity is sufficient to have that effect. Being the best at football requires a lot of practice beyond just staying fit. Yes there are those who are really good at doing both. But that's an exception I'd surmise.)