I asked my consultant if it was ok to still exercise with ET and he said yes, exercise helps keep your blood pumping round your body! Last year I was put on just aspirin, but unfortunatley had to go onto chemo in April this year! I feel fine and I train really hard at the gym. Is there a limit to how much exercise you should do? I love it and work really hard and do not want to stop, it helps with energy levels as I also suffer with under active thyroid! I am only 48!