Mike Robertson did an .mp3 interview with Joe Kenn. Joe Kenn is the originator of the "tier system" of athletic training. It might be a bit obscure to most of my readers, but it's a system he developed to train college athletes.
One his co-workers from his program at Arizona State now trains people at DeFranco's Training (Jeff Carr). Thanks in part to that, I've trained under a variation of the tier system myself with really good results.
Joe Kenn Interview
大会情報：5/28 JBJJF 第1回北海道柔術オープントーナメント 中島体育センター
1 hour ago