angina is a clinical diagnosis, investigations are usually not very helpful in reaching a diagnosis of angina. angina is defined as a feeling of chest pain or discomfort, especially a squeezing or a constriciting type of pain over your chest or other parts of body , usually radiating to left arm shoulder, aggravated on physical activity or mental stress, which may or may not e relieved by rest. in this explanation most important thing is feeling of squeezing or constriction type , is considered as the defining part of angina in doubtful cases as pain referred to left arm as is usually described in public literature can be due to disease of the cervical spine nerves of the upper limb. so if the diagnosis of angina is in doubt, get ur doctor to conduct a treadmill test to confirm it. regarding ur question on mild exercise, a patient with angina can exercise upto an extent that it doesnt preciptate angina or its associated symptoms. some patients with sever disease may be having anginal symptoms at rest in those patients even walking to the toilet can be life threatening, so exercise is totally out of the question. in the rest of the cases amount of exercise will depend upon the tolerance of the patient. if the patient is able to tolerate a particular type of activity without precipitation of symptoms,there is no harm in carrying out that activity, this holds true for everything including mild jogging.