Originally Posted by stevie667

You have to be careful with this approach, it is very easy to overtrain this way.

Do the maximum effort you can with your left arm, and match it with the right, e.g.

10 reps of 15lbs (as an examle) on your left
10 reps of 15lbs on your right.

Don't lift a heavier weight or do more reps with your right because you can, do what the other arm can do, and they'll catch up. If your using barbell exercises, try switching to dumbells (for instance benching with dumbells), this will stop your stronger arm picking up the slack from the weaker one.

Using ol' lefty can't hurt either