Bottom line is get to know your HS coach and their program. Make sure they understand the volume of training/play your kid is already doing. Understand their pre-season program and consult with your coach and or a certified strength and conditioning specialist who is familiar with youth club soccer and better yet a PT or ATC who has these credentials. Make an informed decision if the volume of work is putting your kid at too much risk.
There are plenty of things coaches can do in a 7th period "pre-season" class that will not significantly increase risk of injury to your kid.
There are plenty of things coaches can do in a 7th period "pre-season" class that will not significantly increase risk of injury to your kid.