

Dumbbell tricep extensions are a really effective isolation exercise. This movement targets the muscles on the back of your upper arms known as the triceps. When performed with appropriate resistance and repetitions, this exercise can lead to tricep muscle hypertrophy. Overall this will give you a more defined looking arm with added muscle definition. I like to complete about 3-4 sets with a rep range of about 8-15 reps depending on how heavy the weight is.