Adjust the cable machine so the pulley is high and attach a wide bar. Sit facing the machine with your knees secured under the pads and feet flat. Grasp the bar with a wide overhand grip, palms facing forward. Engage your core and lean slightly forward with chest up. Pull the bar down behind your neck in a controlled arc until elbows reach about 90°. Pause briefly, then slowly extend arms back to the start under control.
Log your cable wide grip behind neck pulldown sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.