actually its not nonsense,because i tried doing cardio in the afternoon instead of morning cause i was curious about results,and am getting the exact same results.also before u guys think im making all this up read this Q & A by lyle Mcdonald hes an expert on dieting and working out
Wannabebig: Straying from nutrition for a moment and its effects on fat loss let’s look at the physical aspect of fat loss. What's your take on doing any type of morning 'cardio' on an empty stomach or performing some sort of resistance training? I believe it was Bill Phillips who revolutionized this method and it's always been a topic that's sure to spark up a good debate.
Lyle M: Oh, this should be fun, piss some readers off. For the most part (with one or two exceptions), I don't think it matters. What Phillips (and everyone else) is getting at is this: in the morning, there is a high concentration of free fatty acids in your bloodstream, because of the overnight fast, low insulin, blah, blah, blah.
Now, we've known for years that, in general, the body will burn whatever fuel is most available. Studies reliably show that when you ramp up fatty acid availability to the muscle, the muscle burns more fat.
So the logic goes: do cardio in the morning, when there are lots of fatty acids available and you will burn more fat and thus lose more fat.
Wannabebig: Seems like a reasonable concept.
Lyle M: And the logic is 100% sound right up until the last part of it "...thus lose more fat." A fundamental mistake that's been held by researchers, physiologists, trainers and coaches for decades is that 'burning fat during activity = fat loss'. You find the same argument in the 'do low intensity activity because you burn a greater percentage of fat' folks; they logic that burning more fat during activity = more fat loss.
The problem (well, there are many problems) is that they are focusing only on what's happening during the exercise bout. That is, they are worried only about what's being burned during the 30 minutes of activity. That's problem #1: what about the other 23.5 hours of the day? Most (but not all) studies have shown that, when you look at total fat use over 24 hours in response to activity, the body will figure it out. For example, if you burn more fat during exercise, you tend to burn less fat the rest of the day; if you burn more glycogen during exercise, you burn more fat the rest of the day. Over 24 hours, it balances. At least two studies have shown (and note that this wasn't in bodybuilders or lean folks) that as long as the calorie burn during activity is the same, fat loss is the same. They had folks exercise at either a low or high intensity for something like 70 or 35 minutes (calorie burn was identical in either case). Fat loss was the same over the course of the study.
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