There is a good weight exercise you can do to help strengthen those muscles. Get a light hand weight (start at maybe 3 lbs) in each hand, seated, lean forward slightly with a flat back (like for a seated tricep kickback) and raise your arms (with a slight bend at the elbow) to shoulder height and hold for a beat or two. Try to do 3 sets of 12 reps. I need to do these, too!!