I want to lose weight (fat) while at the same time try to replace that with lean muscle mass. So what do I do? Ride at a certain percentage of my maximum heart rate to be on some sort of "aerobic zone"? What if I ride harder than that (which I normally do)... am I burning up muscle tissue instead? How do I make sure that my loses are primarily fat and my gains are primarily muscle mass?
What about supplements? Right now I'm trying to eliminate as much carbs and fats and possible and eat as much protein as possible. I'm complementing my daily bike commutes with nightly workouts (weights). I follow a split body routine (M -> chest/triceps, Tu -> back/biceps, W -> legs (easy)/shoulders, Th -> same as M, F -> same as Tu, Sat -> legs (heavy)/shoulders, Sun -> free)
Recommendations or comments are welcome.