What kind of regular exercise or workout stuffs do you do, if any? I don't do nearly enough cardio, which is one thing I really need. But in light of my heart issues I did some research and discovered that the heart eats lactic acid like fuel. So I've decided to start doing push-ups again. It's helping! But I'm up to 50/60+ a day without getting sore anymore, so I'll need something stronger to have the same effect.