So I workout 2 muscle groups every other day. After that I hit the treadmill for 2 miles and that usually takes me almost half an hour (first mile is jogged/light sprint and the 2nd mile is split between power walking and jogging). I'm planning to run treadmill on my days off too, same 2 mile formula. Would all that running cause some muscle loss in the long run? Right now I'm trying to cut weight before bulking up.