Lifting or Cardio?
Great question! I have experimented with this myself. I encourage you to find what feels right for you. That will change as your fitness improves, by the way. It is an ever evolving journey- that is what makes it so much fun!
There is nothing intrinsically wrong with cardio and weights on the same day. Just dont let your workouts get so long that you feel hungry or too tired or bored or dread going to the gym. Some argue that cortisol and other catabolic effects will offset your muscle gains and fat loss if you workout longer than, say, 45 mins- 60mins. This maybe true to some small degree, but have you ever seen a fat Olympiead or Triathalete? Some of these folks train up to 6hrs a day five days a week- no joke!
In general though, if you exhaust your glycogen stores, your body will need to take either glycerol or protien to make more energy (in the form of ATP) for you to keep going. That translates to lost muscle, not really lost fat, because you dont store much glycerol (you store fatty acids, which cannot be used to make glucose).
To avoid this problem altogether, I have done what others in this thread have done. Since I do not wish to threaten mass building, I get more protein and divide my long cardio days such that I have an a.m. cardio and p.m. weight training- or keep cardio workouts short enough so that when done after my weights, my workout does not exceed an hour. The exception is once a week when I do my long runs which can last up to five hours (30miles).
Be sure to get a good carb/protein meal after these workouts. If it will take longer than 30mins to eat, drink some juice or gatorade so your body can start using this glucose right away and will stop taking your muscles apart to get it.
Hope this helps.
Last edited by MaggioMuscle; 02-13-2006 at 09:23 PM.
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