Cardiovascular and pulmonary diseases are insidious when it comes to exercise. Lungs problems and minimal physical exertion might give you a high sense of breathlessness (dyspnea). Consequently, you will start to avoid physical activity to escape that gasping for air, but is avoiding exercising helping you? Escape from exercise because of a threat is a type of “catastrophic thought”: If I exercise, I will feel breathless. If I am breathless, I will be out of oxygen soon. Without oxygen, I might faint.