Set a cable machine to the highest pulley with a rope or handle attachment. Kneel on the floor facing away from the machine and grasp the attachment with both hands, bringing it down near your forehead or behind your head. Keep your elbows close to your head and your upper arms stationary. Extend your arms upward and slightly forward by straightening your elbows until fully extended, squeezing your triceps at the top. Slowly return to the starting position with control, maintaining constant tension throughout.
Log your cable kneeling triceps extension (version 2) sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.