Workin' out brah!?

[Rowan]

So, i'm liking what this thread is you guys rule !

I also come bearing a question, I tried to preacher curl 12KG and my puny arm muscles bitched out so I had to drop to 10 however I can use the 12 for regular curls and Hammer curls, why is this?

how many sets/reps can you do?
Preacher curls are the best because its so easy to lack proper form with bicep exercises.
just remember if you can 3 sets of 8, up the weight!