Shoulder weakness, when benching - Online Doctor Chats

Doctor :   hi
Doctor :   how can i help you
User :   question: female 22 yo athlete, shoulder weakness when benching and shoulder press (cannot lift, non-dominant arm is stronger), sometimes feel a strange feeling down my arm
Doctor :   did you had any injury
User :   no, weakness is mainly in the front (around ac joint is where it comes from)
Doctor :   any swelling of shoulder area
User :   no
Doctor :   does the pain spreads to the arm, hands
User :   sometimes
Doctor :   is there pain while lifting your shoulder?
User :   not a lot of pain, notice mainly the weakness
Doctor :   do you have any stiffness

Doctor :   tingling, numbness and change in sensation
Doctor :   I have to close this window since there is no response from your side, please get back to us if you need further medical advice.