This video show how to this exercise properly, using correct form to avoid injuries!
Standing One Arm Dumbbell Triceps Extension Tips
Exercise Tips: Grab a dumbbell securely with one hand and while standing, position the dumbbell behind your head with your arm extended and a slight bend to keep the tension on the triceps muscle.
Slowly lower the dumbbell to a position behind your head. Slowly raise the dumbbell back up to the starting position. Repeat with your opposite arm.
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