Set the pulleys roughly level with your chest and stand a step or two in front of the machine, one foot forward for a stable base. Press both handles forward until your arms extend in front of you, then let them come back with control until you feel a stretch across your chest without your shoulders rounding forward. Because the cable pulls you backward the whole time, your chest and core stay under tension even at full extension, unlike a bar or dumbbells that go slack at the top. Keep a slight forward lean rather than standing bolt upright, and press through a straight line rather than letting your hands drift up or down.