The tricep extension is a single-joint exercise that targets the triceps, the muscles on the back of your upper arm. Benefits of the tricep extension exercise include its isolation effect, convenience and variety. Although a basic exercise that only involves extending the elbow, the tricep extension has many variations so you won't get bored with the exercise. Variety is one of the main benefits of the tricep extension exercise. You can do this exercise with your arm in a variety of…