When I've trained traps for the past year if I lift my head up with good posture I get a really sharp pain in my right trap if I go over 225 on shrugs... However I can lower my head kinda like bowing my head and lift as heavy as I want to with no issues... The pain is almost like a nerve pain like a sharp knife like pain... It's frustrating to say the least but I've figured out how to overcome this issue at least. Has anyone else had a similar issue on shrugs or can shead some light on what might cause this?