Someties the muscle outgrows the tendon. I have that problem with bi's. During my bicep workout, the elbow screams but the strength keeps increasing. After about four weeks, it did not get better but did not get worse so it's just some pain I have to work through until it heals itself. Just about every part of your body will go through some type of resistance to the punishment at some point. If you look back on all the pains you've had doing this, it would make you laugh at why you do it. But it's the sanctity of the gym, unless you do it, you don't understand.