Pain in my shoulder and near my neck....
Hello, So, three months ago I could not even finish one mile jogging, now I can comfortably jog (4.5 mph, 3% incline) 3.5 miles. However, I have been noticing that around mile 2: - My left shoulder begins to hurt and the pain moves up to my lower neck; - I thought it was bad breathing, but I am breathing normally; - I…
