Yeah, I don't think there's much debate that the 2004 DA teams are better than ECNL.
That said, there are plenty of 2004's who opted out and will play ECNL or even SCDSL so they can play other sports too.
for starters (and including links to other studies on injury): http://www.stack.com/a/new-study-re...ort-athletes-have-a-better-chance-for-success
That's nice, but perhaps we misunderstood each other. I was looking for research that showed multiple-sport athletes were less susceptible to overuse injuries.
I am old enough that the better athletes in my high school played a different sport every season - soccer in the Fall, basketball in Winter, and baseball in Spring. They also participated in recreational sports like skiing, swimming and golf in their free time. No one could imagine a sport that had a 12-month season.