GYM Lovers - Lying one-arm dumbbell triceps extension. An upper-arm exercise that isolates your triceps brachii. There are no synergistic muscles. Instructions Lie on a flat bench with a dumbbell in one
How To: Seated One-Arm Dumbbell Triceps Extension
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Young man doing Standing Dumbbell One Arm Triceps Extensions on Fitnes Ball, phase 2 of 2 Stock Photo - Alamy
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