I suffer from sudden headaches on a frequent basis. They first began when I resumed a workout routine. I workout 4 days a week and the headaches began only during strenuous lifts. Now they are regular and occur whenever there is a sudden movement of my head and neck. My personal physician says that it is only a muscle strain in my neck. Is this true? I question it because I don't have to lift weights for this to happen. For instance, I tried to take it a little light and do some push-ups instead of heavy weights and it still happens. Please help!!