The triceps brachii is Latin for “three-headed arm muscle”. It’s an extensor muscle that joins together at the elbow and is an antagonist of the biceps and brachialis muscles. The triceps cover about 2/3rd of our arm and are primarily used for pushing.
One of our favorite strength exercises to isolate the triceps is the 2 arm Skull Crusher.
1. Lie prone (on your back) holding 2 dumbbells in a neutral grip with palms facing each other, above your chest.
2. Keeping the arms parallel, hinge at the elbows, as you lower the forearms and bring the dumbbells even with your ears. Then return to your starting position and repeat.