The Effects of Jumping on Young Children

I don't think we have the evidence yet to say that. We need this second study to show that this is a condition of puberty. The tendon matures between one and two years post peak velocity. As the kids finish their peak growth, that period afterwards seems to be the most important time. In the ideal world, you would have a biological age for your child, not a chronological age. So very often these boys are still in this peripubertal stage when they are 15, 16.