Cable Upright Rear Delt Fly targets the rear shoulders (rear delts) and upper back (mid-back) to improve posture, shoulder stability, and overall strength. Stand facing a cable machine, hold a handle in each hand, and lift your arms out to the sides with elbows slightly bent until they reach shoulder height. Lower slowly under control. This exercise enhances rear delt definition and helps correct rounded shoulders. Gymcheq helps you stay confident and precise with each rep.