My shoulder starts to ache during exercise what could be causing this?

Ortho: Strain, tear, rotator cuff injury can cause your type of pain. See orthopedic surgeon before continuing with your exercise.

Complex Joint: Can u b more specific? What ex cause/ where is pain? The shoulder is a complex jnt, & many conditions/ injuries (rotator cuff injury, bursitits, tendonitis, labral pathology, etc) can cause pain. Some injuries of the soulder occur due to acute injury & some are from overuse. I suggest you see an ortho for a complete exam. Shoulder pain can also come from neck drmarkgalland.Com/category/shoulder/.