alex87 said:very interesting...i didn't know that the holds were more efficient...so for me when i use added weight to some exercise like for example pullup...at the end i only can do 3-4 x-reps and after i don't hear my lats and my biceps...is a great way for build a solid basic strength if you are starting from zero...and i think that x rep can function if you use a very big weight...not maximal but 90% of IRM....
The thing about the holds is that you have to periodically increase the weight, otherwise you stop adapting eventually. The best part of the X rep system is that you are specifically training the stretch reflex, which is pretty important for power generation. The WORST thing about it is that if you use too much weight and move too fast you'll get strains, because the forces are multiplied by 2-6x depending on the speed you use at the point of directional change from down to up. That can very easily become more than the body can handle safely! This can't happen with the holds.
The hardest thing about the holds, in my opinion, is having a good set up to do them on! All you really need is a pull up bar and a few cinder blocks or maybe a pile of books if you have a whole lot of books that won't slide off of each other. Dip bars are nice too, that rounds everything out.