I am 71 y.o., 6'1" and 245 lbs. and diagnosed with 4.6 cm via MRA about 2-3 years ago when I was working a high stress job. I freaked when I was diagnosed, quit the job, and did nothing for a year physically (and deteriorated) for fear of worsening my condition, and read all I could online about it and learned a lot. On exercising, my cardiologist said that I shouldn't engage in the Valsalva maneuver when exerting, i.e. doing anything that makes me grunt or hold my breath during effort. He said all aerobics are fine and I could do any exercise if adhering to the rule. So currently, since my last office visit, I started a regimen of 1/2 hour rowing, followed by a circuit of weight machine training with weights that I can handle keeping steady breathing in and out, and then 1/2 hour fast walking on treadmill. I am trying to condition my body and lose more calories. There's some contradictory information on-line regarding exercising, and much of the advice is made up, e.g. how much weight should you lift in proportion of your body weight, etc. without taking variables into account. So, in a way, I am my own guinea pig. I see my MD next week and am due soon for my annual scan. We'll see. Anyway, is anybody else engaging in more than just aerobic exercise and if so, what regimen appears safe using resistance exercise in your experience?