bignate73 said:
i was joking with you at first(knowing your take on plyos), but for you to assume that HIT is used in season... well maybe im not. plyometric and event oriented training is the core of inseason work, strength training (especially for hypertrophy) tends to get the back seat as power and reactive explosiveness is now desired. assuming the schools you mentioned above have track and field, basketball, etc. I have no doubt that they use reactive neuromuscular training (plyos) to increase performance.
offseason and for strength work....i may agree with you that they use HIT. but i dont know an AT or strength coach that doesnt have a CSCS cert. CSCS being through NSCA, their focus for inseason is plyos and speed(if we are talking about a sport that requires: running, jumping, changing directions rapidly, etc.)
There is NO conclusive evidence in the literature that inducing the myotactic reflex of a muscle by using a pre-stretch leads to greater power or "explosiveness." It HAS been shown to lead to patellar tendinitis, shin splints, and ankle and knee strains, among other things. There is a notion, which many advocates of plyometrics seem to conveniently ignore, called the Principle of Specificity. Skills that superficially appear very similar are based on very different patterns of muscular activity. Specificity consists of four basic elements:
1) Muscle specificity - the EXACT same muscle used in the skill must be used in the exercise
2)Movement specificity - the EXACT movement pattern used in the skill must be used in the exercise
3)Speed specificity - the speed of movement used in the skill must be IDENTICAL to that used in the exercise
4)Resistance specificity - the external resistance in the skill must be PRECISELY the same as that used in the exercise
At best an exercise can approximate an athletic skill, but it CANNOT duplicate one. To improve athletic performance, the actual skills must be practiced. A stonger muscle, will however, produce more force and thus allow one to be more explosive. This, however, can be accomplished using any strength training protocol that involves progressive resistance.
Further, there is no conclusive evidence that lifting in an explosive manner will cause a change in the fiber composition of a muscle or selectively recruit fast-twitch fibers. Muscle fibers are recruited in an orderly pattern, based on force requirements.
Anyone who employs a HIT approach is aware of these facts. The fact that a coach may be a member of NSCA does not necessarily mean he regards it as a useful governing organization. Here are two articles on explosive lifting written by coaches mentioned previously. I think they lay to rest any suspicion that these men use plyometrics in-season:
Ken Mannie, strength coach for Michigan State football:
http://www.cyberpump.com/training/trainhard/explosive.html
Jeff Friday, strength coach for Minnesota Vikings:
http://www.cyberpump.com/training/trainhard/explosafe.html