Stand facing a cable machine with a straight bar attached at the top. Grasp the bar with an overhand grip shoulder-width apart. Keep your arms straight (slight bend at elbows), chest up, and core braced. Pull the bar down in an arc toward your thighs by driving your lats, keeping arms extended. Pause with control at the bottom, then slowly return to start.
Log your cable straight arm pulldown sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.