Ok, this began about 3 months ago when I would be doing my chest workouts, using barbells. My left shoulder would begin to hurt during flat bench, effecting the rest of my workout. So I switched to dumbbells, and the pain was nonexistent. Unfortunately, it started up now while using dumbbells, again, effecting my workout. What can I do to stop the shoulder pain? Many thanks in advance!
-Shoulder started hurting during barbell workouts.
-Switched to dumbbells, pain stopped.
-Pain started up again.