Eventually you run into limits, that&#x27;s when the real work begins. It took me 3-4 months to work up to where I could do cardio 3 times a day for an hour a pop. I use a hybrid cardio machine called the Arc trainer at Planet Fitness.<p>I did that routine exactly once before my right calf muscle developed strain. I&#x27;ve played this game before a dozen times with a dozen different activities. Every time I wind up losing focus and that&#x27;s why I have a dozen of them and not three of them.<p>So rather than drop cardio entirely, I&#x27;m backing off to three or so sessions a week and cutting down the length to a half-hour to 45 minutes depending on how I feel. I&#x27;ll pick the frequency back up as my muscles heal.<p>You really do have to get obsessive over little details to be able to do this. I have a fairly strict routine that I follow every single time I go out to the gym. One time my iPhone decided to start updating against my wishes just as I was about to get on the machine.<p>After some choice swear words, I packed it up and went back home. It wasn&#x27;t worth sitting at the gym waiting for music and trying to work out without music wasn&#x27;t going to give me a good workout. Focusing on quantity allows you to skip sessions knowing another one is coming.