I consider myself that I had beautiful childhood because of sports that I was actively playing. My favourite were tennis and basketball. Since I grow up by the sea, I can say that I am pretty good swimmer too. :) However team sports thought me a lot what is mentioned in this post. Team work is the most important I believe as it created synergy so 1+1=3 in that case. I have learned that only competition should be between me and earlier me, to realise how much I have improved. I was applying all that latter on in high school while being a dancer, again as part of the team where I was teaching my fellow dancers the same thing "let's just be satisfy with our performance, not comparing ourself with other groups". And guess what, we won every time! I would lie if I would say I didn't enjoy that winning, but I realised even back then when I was only 17 that lot of pressure and expectations are gone if you just let go your ego to be better then others.
I am still doing my best to be active in some way and I know how much benefits that brings for our body and mind, both.

Regarding coaches, I just wish to all children to get wise ones..

Namaste.