I play ice hockey 2 times per week and usually get home from my games around 11pm or so. Hockey is a rather cardio-intensive workout (1 to 1.5 minutes of hard skating, then a few minutes resting on the bench, then repeat for about 45 min to an hour).

It's also a great workout for the legs - they start to burn pretty bad and get weak by the end of the game.

So I'm trying to cut down some BF (I'm guessing I'm around 16%-18%), but hit the gym with weights 3 to 4 times per week, and then a few more days of cardio plus my hockey.

Question: Should I slam back a casein shake before bed, or since the hockey is mostly aerobic, should I just let my body burn it's own fat stores? Sure I don't want to lose the muscle I have, but I don't want to impede any of the benefits from getting the cardio in?