Having heart issues brings barriers to most of the aspects of your life. There are several things that you used to do before being diagnosed with cardiovascular disease, but you are unable to do them now. You have to be cautious about the after-effects of anything before doing it. It includes having sexual intercourse as well! Sex can cause chest pain due to the decreased flow of blood to the heart, increasing the risk of a heart attack. Just like any other form of exercise, sex requires some amount of heart fitness.