The single-arm incline cable cross-over is an isolation movement that uses a cable stack and a bench to target the upper part of the pectoral muscles. Working the chest one side at a time allows you to focus on balance between the sides of your chest and really feel the chest muscles contracting. It is common in upper-body and chest-focused muscle-building workouts, often in combination with other presses or flyes to target the chest from different angles.
Unlike dumbbells, cables provide constant tension, including at peak contraction
Can quickly switch weights for dropsets
The line of resistance from the cables targets the muscles of the upper pectorals
Stretches the chest muscles under load which can lead to greater muscle gain