The player burn out theory is an excuse people make for not working as hard as these kids. When I was a kid I played major travel hockey growing up, we would miss schools on most fridays to travel for the weekend, the car ride was spent doing my homework, we would play withing a 2 hour drive a few times a week during school nights, then go to Buffalo, Toronto, Montreal, Boston etc on the weekends. We would play well over 100 games a year and practice when we didnt have a game. Our summers were spent in week long camps at BGSU, MSU or Michigan or Power skating camps etc. When all is said and done, that was the time of my life, one kid that was a goalie for my first travel team when I was in second grade is still one of my best friends to this day at the age of 37. We started hanging out on a trip to toronto when we went to hockey hall of fame and been hanging out ever since lol. If I didnt love playing hockey I promise I would have gotten burned out, but I loved it, that is what I wanted to do. I started playing when I was 4 and about 5 years ago stopped due to time constraints with work kids etc, and I really really miss it.
My point is dont assume these young ladies will get burned out, its a beautiful thing to see a kid find something they love to do and are good at. As long as they continue to love the game, I see no reason any of the kids will get burned out. Just IMO ?;D