Lactate Threshold Training

[John]

@ESTI

Anyone have experience with kids who do well at younger ages in the 400 (early HS) and struggle later on? Possibly a puberty connection?

I also noticed differences doing Gambetta leg matrix in younger vs older athletes. younger athletes don’t seem phased by it, while older athletes get crushed doing one set.

what do you term younger and older? There is discussion here? about athletes competing at 400m too young (pre 16-17) and regressing over time.