hey i know compound excersies build the most muscle bit i can't seem to increase my weight in biceps. i do the split workout, back and bis. i do upright rows, bendover rows beadlift and lap pull downs. there is no pull up or chin up bar so i can't do that but by the time i move to biceps i'm pretty tired and don't have enough endurance as i like. so i stick with a weight that i can do 4x8 each arm or 5x5 or should i do like 12 then 10 then 8 then 6,4,2 increasing weight almost each time. i need help and any advise that makes sense would be great thanks