Overhead tricep extensions are a strength training exercise that primarily targets the triceps, the muscles located at the back of the upper arm. To perform this exercise, you typically use a dumbbell or a resistance band. Start by holding the weight above your head with both hands, arms fully extended. Then, lower the weight behind your head by bending your elbows, keeping your upper arms stationary, before returning to the starting position. This exercise can be done standing or seated and is effective for building muscle strength and definition in the triceps. It's important to maintain proper form to avoid injury, ensuring that your core is engaged and your back remains straight throughout the movement.