This si my case. The first week I started a new chest routine, I would use a free wieght machine where you sit down and push out on 2 handle bars. I would do 1x12 1x10 and 1x8, Now when I use this mahcine I use it extremely heavily. Whne I a done with this machine my arms feel like their dead.
After about 5 minutes I get a little bit of strength l;eft and I use a machine where I sit down and push wieght down, I do the same order as the first machine and I do this machine heavily. Now my arms are gone. I went over to the water bubler and it was hard pressing the water thing. believe it or not.
Anyways the next machines I can only do about 20lbs less then I reg did when I was over training.
I have been lifting for the better part of a year now and I should be able to handle that.
Is it becuase there new exercises ?
Am I not eating enough ?
Not enough rest ?