Stand facing a cable machine with a V-bar attached to a high pulley. Place an arm blaster around your upper arms to keep your elbows fixed in place. Grip the bar with an overhand or neutral grip and keep your elbows tucked close to your sides. Extend your arms downward by straightening your elbows, focusing on contracting your triceps while keeping your upper arms stationary. Pause briefly at full extension, then slowly return to the starting position with control. The arm blaster helps prevent cheating and improves isolation of the triceps.
Log your cable triceps pushdown (v bar) (with arm blaster) sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.