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Post by steve on Mar 26, 2009 14:13:52 GMT -5
Hey Brian, Just wanted to get your take on this article... exercise.about.com/cs/cardioworkouts/l/aa022601a.htmMaybe help me understand it a bit better. It talks about the difference between the cardio zone and the weight loss zone. Where do the calories comes from that aren't calories from fat? Do you agree or disagree with the article? Also, where is that article you mentioned  Muscles? I couldn't seem to find it. Hope everything is going well. |
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Post by Brian Ayers, CSCS on Mar 29, 2009 18:30:43 GMT -5
Yea Steve, that article is accurate. The other fuel that your body is able to burn is carbohydrate. The reason that fat is the primary fuel source at a 60-80% heart rate zone is because fat can only be burned in the presence of oxygen (aerobically). As your heart rate increases, so does your breathing rate as your body tries to take in more oxygen. Originally it was believed that the body burned fat up to a set point known as the anaerobic threshold. After that point the body switched over to using glucose from glycogen which is how your body stores carbohydrates. Your body can burn glycogen without oxygen being present (anaerobically), however, the byproducts from that anaerobic metabolism, lactic acid being one of them, forces your body to back off the effort. This makes it a short term system. That's why even the most elite sprinters can only sprint for so long. Further research has shown that your body is never just using one fuel or the other, but rather a mix of both. As you get closer to your max heart rate the ratio of fat to carb usage shifts. In the "weight loss zone" you describe the body is using a higher percentage of fat. In the "cardio zone" your body is using a higher percentage of glycogen. It is a bit misleading however to view lower intensity cardio as the most effective way of loosing weight. There are a lot of other factors that go into your body releasing stored fat. Strength training is also considered to be an anaerobic activity, however it yields much higher potential for dropping body fat as I discuss in the , muscles article that you mentioned. Here's the direct link: --muscles" rel="nofollow" target="_blank">www.examiner.com/x-3162-Hartford-Weight-Loss-Examiner~y2009m2d16-Weight-loss-tip-6---muscles |
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Post by ddddyyyy on Jul 13, 2009 3:32:16 GMT -5
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lost180
Fitness Enthusiast
Posts: 153
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Post by lost180 on Jul 13, 2009 16:18:13 GMT -5
Looks like this may be some kind of spam bot.
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Post by Brian Ayers, CSCS on Jul 14, 2009 13:15:51 GMT -5
Are u a spam bot ddddyyyy or do you just like to agree with people
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