 [ Symptoms ] will exercise affect my heart murmur  i try to work out at least 3  5 hours a week i get tired but keep going will this cause any damage [ Disease ] unfortunately i do not know anything about your heart murmur there are many different types and causes before starting an exercise program it is a good idea to get the okay from your doctor or have an exercise ecg stress test you will need to consult your doctor    someone who knows your medical history