Set a cable machine to a low pulley and attach a straight bar or rope. Position a flat bench in front of the machine and lie on it with your head near the pulley. Grasp the attachment with both hands and extend your arms above your chest. Keeping your upper arms stationary, bend your elbows to lower the attachment slightly behind your head instead of toward your forehead. This increases the stretch on the triceps. Then extend your arms back to the starting position by straightening your elbows and squeezing your triceps. Move slowly and maintain control throughout the exercise.
Log your cable lying triceps extension v2 sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.