referring to hgh and sprinting article. interesting that the performancing enhancement comes from unexpected place as how much energy muscles can store like says in article . so start to think like someone said earlier in thread about and many other threads can someone not come up with new training techniques to explain the better times in sprinting and thought . well why in 80,s,1990,s ,why werent sprinters not doing all this longer sprint endurance work with all winter 400 metre runs at high intensity. to me seems like to be only of negglible benefit for short sprints , lactic threshold , aerobic benefits are only of negigible benefit to short sprints even take away from it if do to much long distances why not put time into other things like weights where know gains in power will translate in to faster times what has changed physiologiclly with body of sprinter from like 2004 /2005 with powell then bolt and now gay all regularly having potential to dipp under the 9.80s in good conditions regularly or even crap conditions what has changed for the addition of this to training regime that previous sprinters in 70,s 80,s 90,s didnt do would they have not tryed every possible type of method and stayed with what works especially with whole countrys behind them like with old soviet states well what has changed in 10 years . well if throw ped that increases energy storage in muscles into mix then all these 400 metres at full intensity make sense to get muscle and mitrocondria to be able to store as much glucose as possible and equate to max performance enhancement from this particular facet of you sprinting make-up , besides power , strength and technique ,so on . and maybe if muscles can hold more energy then especially good for longer legged athlete as have more energy to move legs faster or nervous system has more energy to do so. i know not very scientific but just throwing out there and were not powell , followed by bolt one of first sprinters to start this trend in mid 2000's doing lots of 400 metre sprints , can someone tell me ( if they even do 800 metre lengths and how can that be of any advagetage to sprinter as now starting to change some of those hard earned fast twitchers into slower type due to training over to long distance) now gay as added this to his training regime , circa 2010 let us know what think , as knowledge of subject could be better just throwing ideas out there . also thought it so going to say it , what times would lamitre have to run for in afew years time for you personally to accept he is using ped.s obviously anthing under 9.80's as there is a certain amount of similarity's between him and bolt , the height been the obvious one and question why havnt i seen any athletes of his height and ectomorph phyisique running such times before from europe and such progression . maybe started with same sort of regime over here , guess time will tell . all previously being more of the stockier mesomorph , power dependant sprinter like pickering and even if not as muscled as him like wells or pietro minnea they were still power type sprinters and not as tall i think i do remember some tall long legged sprinters in 80's but never near as fast as him and that was with questionable use of steroids,eastern block.