Q: this is more of a comment.I have never lost muscle doing a lot of cardio like an hour or more 7 days a week. Only people who are on low calorie diets lose muscle when they do cardio. Since I always eat whenever I'm hungry I could never lose muscle unless I did a massive amount of cardio. And even If one did a massive amount of cardio and lost muscle it wouldnt really matter because the calories burnt by the lost muscle would be less than the calories burnt from the massive amount of cardio.

A: If you are sure that this approach is working for you, then there's no need to fix what isn't broken. You are definitely doing the right thing by not restricting your calorie intake too much while doing a lot of cardio. Near-starvation diets coupled with excessive cardio are the surest way to drive your metabolism into the ground and start losing muscle instead of fat. You are wise to avoid that common pitfall and that certainly helps a lot.

As I said, if you feel that your current training methods work well, I would not advise you to change them. However just keep in mind for the future that as you age, your metabolism will keep slowing down and you will have more and more difficulty hanging on to your muscle mass. I encourage you to be aware for the future to non-cardio intensive fat-burning techniques.

Also, if you are a big fan of cardio, I recommend that you take a look at HIIT -- High Intensite Interval Training. It's basically cardio that's performed like weightlifting exercises: very high intensity, short duration, in sets with short breaks in between sets. You start out doing four 30-second intervals of high intensity cardio (basically, sprinting) each of which is followed by 30 seconds of relaxed walking. So your session goes like: 30 second sprint, 30 second walk, 30 second sprint, 30 second walk, 30 second sprint, 30 second walk, 30 second sprint, 30 second walk. You do this 2-3 times a week and add another interval with every passing week, building up to 15 or so. This is another effective variation on anerobic exercise and should especially appeal to those who like cardio.