The problem with biceps.

Problem 1 - More Is Not Always Better:
If doing 4 sets is better than 3 sets, why don't you just do 10 sets? It has been said before, but it obviously needs to be said again: "Less is often more." Especially if you are not gifted with "muscle-friendly" genes.

Your goal of each weight training workout should be to simply 'out do' your last workout. Once you achieve this with an extra pound or a few extra reps, then it is time to move to the next exercise. Not to Nazi-torture the muscle for another hour.

I have found this a hard concept for many skinny guys to grasp because they are fixated on the instant gratification of making their biceps 'look' big during the workout and not what they look like when they leave the gym, which leads us to our next problem.

Problem 2 - Being More Obsessed With How They Look While You Train Rather Than When You Are Not Training!
Problem 2 ties in with problem 1. The truth is that the longer you train your biceps, even if the weights are not extremely heavy, you can achieve a fairly decent pump that can turn a few heads while in the gym. This attention and perception that you are doing something beneficial is deceiving.

Yes, there is something to say about keeping blood in the muscle as long as possible, but if the workout is done with weights that do not overload your muscles and emphasize an increase in strength, your biceps will quickly deflate back to normal with no true muscle growth.

Problem 3 - Not Focusing On Increasing Your Overall Strength:
Some of the biggest guys I know rarely even train their arms. What they do though is put a strong emphasis around increasing their chest, back and shoulder strength. If you simply focus on increasing the weights on your rows, pull ups and chin-ups, rest assured that your biceps will come along for the ride and grow proportionally.

However, if you are always blasting and 'smoking' your biceps, they will always be fatigued when you train your back muscles and, as you should know, you are only as strong as your weakest link. This is another reason to take a lower volume approach to arm training.

Problem 4 - Using The Same Bicep Exercises Every Time:
Every pro bodybuilder will put their money on two of the simplest exercises for building huge biceps - barbell curls and dumbbell curls. According to the pros, these two exercises have built more huge guns than any other exercise in the world.

I definitely agree that these 'simple' exercises are a safe foundation to build a program around. I have no problem using these two exercises under one condition - you are getting stronger from week to week. As long as you are increasing the weights and reps relative to perfect form, then your arms should continue growing. Aim to build your barbell curls up to 110 pounds for a few "slow speed" sets and your dumbbell curls up to 50 pounds for a few "slow-speed" sets that involve zero rocking and swaying.

Once you build your barbell curls up to 110 lbs, you will be ready to try these two different angles on the bar. You will have to drop your weights a bit, but stick with these two variations until you build back up to 110 pounds:

Problem 5 - Not Enough Tension On The Muscle:
I think many weight trainees do not fully grasp the concept of isolating and actually training a muscle. They do not know how to make the muscle work and fatigue. Instead, you see a lot of swinging, momentum and sloppy lifting used to move the weight from every part of the body except the one they are actually trying to train.

The biceps have a very strong response to "constant tension," which means you should never give them a chance to breathe. Keep the bar constantly moving without pausing at the top or bottom. Focus on squeezing the heck out of the bar and never let your biceps relax until the set is over.