Health in youth sports, parents need a warning, coaches for the most part are doing more harming of their youths future health and future attitude toward athletics in a harmful and negative way by their improper (wrong) conditioning methods! and not understanding health at the deep level!
Bert Seelman designs programs for physical human performance on all levels and here he speaks about the preventive needs for essential nutrition and adequate rest!
for more info:
bert seelman - google
the great fitness fraud - the book