Seated cable crossover flyes

Instructions

Sit on the machine. Grab the two pulleys behind you and bring your arms almost stretched in front of you until your hands touch each other at your chest's level. The top of your back is pressed against the seat, your shoulder blades are slightly retracted and your bust is bulging. This is the starting position.
Spread your arms backwards, keeping them almost straight, until you feel a stretch in your chest. Only your arms should move.
Hold this position for one second then slowly return to the starting position.

Muscles