I don't focus on biceps at all, it's just the tendons in the area that have been a problem. Lat pull/pullups were the 2 exercises that have given me problems for a few months. Travelled for a week/didn't lift then my last session led to some crazy long soreness and pain. Have a concept rower I do for cardio and giving that a break for a bit to see if that helps things. Problems arose around the time I bought it.