Stand sideways to cable, hinge forward, and hold handle at shoulder height with an internally rotated shoulder.
Brace free hand against support, then bring working arm across chest in an arc.
Squeeze chest at the end, then slowly return to starting position.
دليل تمرين Cable Braced Single Arm Internally Rotated Chest Fly - تدريب Klatka piersiowa | MuscleWiki