[Basic triceps exercise - one-handed dumbbell arm extension] -
Note: The upper arm is perpendicular to the ground and falls slowly to avoid elbow discomfort.
Action description: Sit upright, lift the dumbbell above your head with one hand, and then use your arms to bend your upper arms and forearms as close as possible.
Use the strength of the triceps brachii to lift the dumbbell until the arm is fully extended, pause, and repeat.
