One arm triceps extension exercise using dumbbells

One Arm Triceps Extension :

➊ Get up and hold one dumbbell with one hand behind your head, elbow at a ninety degree angle, higher arm straight up.

➋ Raise the dumbbell with one hand till your arm is near being totally extended and slowly lower it back when a brief pause. Alternate when a group.

➌ Keep your higher arm still throughout.