Sound advice has been given by others here - it's a good idea to seek a professional opinion to develop an exercise routine geared to your needs and possibly changed abilities. Cardio rehab or a PT may be the way to go, see if you can get a recommendation, you may want a referral from your EP or cardiologist because insurance may cover it at least partially. We are all different in healing and when we can begin exercising. Two days after ICD I was walking 3 miles (put arm in a sling to limit movement), cooking, riding the recumbent bike at the gym and doing things that did not require much left arm use. Since I was healed (septal myectomy and 4 months later an ICD I named Buddy - 3 years now), I have no problems doing planks, other core strengthening exercises, machines lifting 50 and pushing/pulling 70 pounds. I am 79. Remember that our goals are to live out best lives at every age and physical ability! Good luck @mauricepower you will find your comfortable niche. @jc76 your experience was a bit different. I wonder how much male/female recovery differs - muscle structure differences may impact movement.