 [ Symptoms ] triple bypass completed 7 months ago need my brother be concerned about exercise increasing my heart rate above 110  quit smoking before surgery and have lost weight he is 58 and walking every night for 40 minutes and climbing 50 stairs and a hill up and down he feels fine and does not feel it necessary to stop but someone told him he should not even be mowing a lawn because he has heart disease [ Disease ] i am glad to hear your brother has quit smoking and is doing so well post surgery that is fantastic exercising after coronary artery bypass surgery is a good way to keep the heart healthy that said your brother should consult his surgeon for details concerning how much he should be exercising it is possible he is doing too much and then again it is possible his doctor wants him doing more than he is a simple phone call to his surgeon is office will get him the information he needs to keep his ticker in tip top shape every heart patient is different and the post surgery exercise program is unique to the individual i am sure the person who told him not to mow the lawn was well meaning but it is best to get medical advice from a medical professional wishing your brother well