As for all other hobbies, diving is among the most stressing to the cardiovascular system. This is why most doctors think scuba divers should always make it a point to practice diving with a good heart. That is, to maintain levels of actual blood pressure at all times while diving or otherwise. A
scuba diver actually needs to have a good running cardiovascular system at all times, even before or while diving. You see, isn't scuba diving a sport which makes actual use of a person's breathing mechanism? Plus, doesn't a person's heart dictate the way he efficiently makes use of his lungs?
