
The single-arm dumbbell triceps extension works the triceps, one arm overhead.
Seated or standing, hold a dumbbell with one hand, arm extended overhead.
Bend your elbow to lower the dumbbell behind your head, then raise it until your arm is straight.
The elbow points upward. Hold it with your other hand if needed. Do both sides.
Image and text: Bryl Lim / Everkinetic — recoloré et rastérisé — CC BY-SA 4.0, via Workout Guide. Original entry