Would this site help?
Bodyteen Muscular Anatomy Arms (Scroll down to "wrist curls")
Interested in Language
Hello can someone explain those sentences that highlight in green, red and blue colour, please? I dont understand what it mean.
"This keeps a stronger biceps from overshadowing the weaker, which can result in asymmetrical arm development. Also, be sure to twist the wrist during the movement for total biceps contraction.
"However, I believe one major reasons bodybuilders show weak points in the biceps is that they do the exercises incorrectly. You need to master proper technique--keeping the elbows steady, lowering the weight rather than dropping it, employing as many Shocking Principles as possible--and then you will be much less likely to have problems in this area.
"For example, I see a lot of bodybuilders using their forearms when they do curls, starting the motion with a kind of Wrist Curl which takes away from the effectiveness of the exercise.
"Or they will do a Curl and, at the top, instead of flexing their biceps--to maintain maximal tension--they will just throw the weight back toward their shoulders, leaving the biceps loose and not working at all. I recommend instead using the peak contraction principle--flexing the biceps as hard as possible when you get to the top of the Curl."
Thank... How how have you been training?