I'm concered about the many muscle pulls i'm experiencing. I've pulled both of my traps and my neck feels like its constantly getting little minor tears. I get these alot when i'm working trap, shouders and tris for some reason. i've tried supplementing potassium to no avail. I eat healthy, warm up and stretch properly and I find myself constantly paranoid during my workouts of the chance of re-pulling something. I'm only 28; this shouldn't be happening at my age. Any ideas what may be causing this?