James, how much do you feel the iso holds effect elasticity. And if so in what way and why.
If anyone has any descriptions or knows of sites with descriptions of the glute-hams or reverse hypers it would be appreciated.
Reverse Hyper: http://asp.elitefts.com/qa/default.asp?qid=4108&tid=113
Glute Ham Raise: http://www.exrx.net/WeightExercises/Hamstrings/BBGluteHamRaise.html
I think you’ll enjoy the reverse hyper pictures that go along with the description 
James why do you always subscript iso holds, what advantage do they have over eccentric/concentric movements. iso holds take out the plyometric effect. So just for strength and muscle is it? 5min reps are a bit extreme, the weight would have to be quite light? 5min teaches you proper motor patterns? If thats the aim why not just sprint?
Yes I do enjoy those pictures 
Thanks for the links