The standing dumbbell triceps extension is a strength exercise that effectively targets the triceps. It has been practiced by many weight lifters for decades. Like most triceps extensions, the standing dumbbell triceps extensions work the triceps from the elbow right up to the shoulder joint. It is an isolation exercise just like the other triceps extensions and for individuals with imbalances, it is very effective. When doing this exercise, always keep low rep timing and be in full control of your weights.