No it is the specializing in one sport that does damage down the road, not 5 a days at the beg of a season.
We complain about kids not getting enough excercise, this is why.
We have had parent meetings with the coaches where all this has been explained over and over. Some parents had these EXACT concerns and this is how it was addressed. These guys have been coaching and or playing for years. DH played, he does not coach (does baseball bc it works better with work schedule) and this is how he explained it as well.
Fine but when you see middle school kids with ACL repairs, ankle braces on both ankles, icing shoulders after having torn Rotater Cuff injuries you will change your tune very quickly. Just because they have been coaching for "years" doesn't mean what they are doing is right. I have coached for almost 30 years and was an athletic trainer for a college and by the time some of these kids get to high school their bodies are so abused they can't play high school ball. Yes, specializing in one sport makes it worse but so does practicing too much for any sport.
See, the kids practice for 5 days/week for 2 hours for football, then do the same for basketball in the winter, then move on to baseball in the spring, never giving their bodies time to rest--oh, and then they double up on sports for several months because you know you have to start working out for football in March during baseball season or you won't be in shape for football, then basketball starts in August during football for a Nov season start. It is a never ending cycle. Until kids are in puberty this kind of abuse of their bodies is NOT good. No 8 or 9 year old NEEDS to practice this much, EVER, for any sport. Once they get into 7-8th grade, fine, but not when they are in 2nd grade.
My DD has a friend, they are 14 who had a "career" ending injury in 8th grade softball this past spring. That should NEVER happen at that age but between the soccer/basketball/softball practices going non-stop year round, she is done playing sports because her arm is mush. This happens ALL too often.
It used to be you MIGHT see ONE serious injury during a season in HIGH SCHOOL-a torn ACL or something similar. Now 1/2 the team has a brace on for something.