EZ Curls - Biceps "shuts down" !?

I'm having a strange problem with my curls, my biceps seem to shut down
all of a sudden, though I feel I could do a few reps more

Maybe an example will help to bring the problem across:

Let's say, I aim for 10 reps per set.
I do 7 reps with good form and no greater hassle, so I think I should be
able to do a few more... BUT, all of a sudden, I can't even manage to do the 8th rep! Not even with bad form! It's like someone cut off the brain-to-biceps
pipeline. wtf???


Can anybody give any hints to this mystery? I mean, with all other lifts I get
to a point where i can feel, that the next rep will be hard/probably impossible
to do, but not so with the f***ing biceps curl

Strange....
 
This has happen to me a few times over the last month also. No idea why probably due to the fact the the bicep muscle is relatively small and exhasts easy.
 
do you ONLY do ez curls? if so, you need to vary your routine...and definitely include hammer curls almost every workout.
 
@newf: So at least I'm not alone with this :)

@malkore: Yes, the EZ curl is the only biceps isolation excercise. I will try dumbbell
curls next time, to see if the same thing happens again.

I do the curls on my "back" day at the end of the workout, so the biceps is probably a little wasted already, which is fine. I just find it strange, that the line between a normal rep in good form and ROM and complete failure is so thin...
 
definitely change things up. hammer curls are about the only constant exercise for me right now, but I add in supinated barbell curls, or db curls with the neutral-to-supinated transition.

I've had my biceps fail out on me like that before...but it normally doesn't happen.
This might be a good time to try them with DB's instead, one arm at a time,a nd use the free hand to push yerself thru the rep, and then have a 3-4 second negative rep.

When my muscles get stubborn, it only makes me work them harder.
 
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