Stand with a resistance band anchored under your foot or at a low point. Grasp the band with one hand and raise your arm overhead, keeping your elbow close to your ear. Slowly bend your elbow to lower the band behind your head, then extend the elbow to press back up, focusing on squeezing the triceps throughout the movement.
Log your band overhead single arm triceps extension sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.