how to build bigger arms when working out with dumbells

When using dumbbells to train the arms, you are going to want to stick primarily to lighter weights of 80% 1RM or less. This loading scheme would put you in the 8 plus rep scheme. The primary reason for this is when training the arms, you want to focus on muscle hypertrophyrather than strength. GenF20Muscle HGH Fitness for Workouts and Sport https://www.genf20muscle.com/