Non-cardiac chest is related to a problem with te esophagus, the tube that connects the mouth with the stomach. One of the most common cause of non-cardiac chest is Gastroesophabeal reflux disease (GERD) aka acid reflux. Other problems unclude; muscle problems, visceral or esophageal hypersensitivity, stomach problems such as ulcers, mucle or bone problems in the chest, lung conditions or dieases of the pleura and stress, anxiety or depression
Cardiovascular exercise is any exercise that gets the heart rate up and increases blood circulation. Cardiovascular exercise utilizes large muscle groups. Aerobic exercise requires to use large muscle groups rhythmically and continuously. These muscle movement over a sustained period of time keep the heart rate to at least 50% of its maximum level.