Training one arm at a time is the best way to ensure optimal focus on the target muscle, enhance fiber recruitment and overcome strength imbalances between the sides of your body. (fitnessandpower.com)
Doing the same exercises over and over again will cause strength imbalances and poor progress. (fitnessandpower.com)
The reason why they are so effective is that they target each arm separately, which eliminates the development of potential strength imbalances whilst building new muscle mass. (fitnessandpower.com)