Pretty weird, all my lifts steadily improve but over the past 3 months my bicep strength has just deteriorated..and trust me with the 8 sets I only do for them, it can't be overtraining. I really don't understand this sh!t and I got so pissed today after barely being able to do 25's i threw the weights...This is really frustrating man and I don't udnerstand it. Any tips?