I have been working out for 5 years and within the first year and a half, I noticed a popping sound in my left shoulder that also doent feel so good. It started with my arms to my side and lifting out w/weights for my shoulders/delts and would pop going up and right when iam about to go down it would pop louder and jolt my arm.well within the past 3-4 years its been getting worse,l cant even do incline bench,i have to do it with dumbbells,and i cant sent the weight down without it popping so i have a friend take it when iam done.even around the house just picking up a cup,jacket or whatever it pops just not as loud,it seems whenever it gets in a certain position it happens.it will do it without even picking anything up.my question is, is this serious like operation time! or is there some reharb exercise i can do? or just quit doing shoulders.Also i have small biceps everything else is fine,i heard that i should do high weight/low reps...is this true? what kind of routine should i do for bi's? any help would be greatly appreciated.