When i work on my arms my biceps seem to give me trouble. They seem to burn out before i feel like i get a chance to really work them. When i am doing my triceps i feel like i have endless energy and work them well. Perfect soreness the next day. My biceps never feel that sore the next day. I'm limited to dumbells, barbell, and small bench. I aim for a weight that allows me to almost complete 4 sets of 8-10 reps, per excersize. Should i try more weigh, less reps? I litterally feels like a stamina issue in my muscle.