Science - TCA Cycle

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Science - TCA Cycle

Postby Canuck Singh » Thu Oct 30, 2008 9:13 pm

The TCA Cycle (Tricarboxilic acid cycle) is simply one of 3 biochemical names for the aerobic energy pathway cycle. It is also referred in many texts as the Citric Acid Cycle, the Krebs Cycle and a few others but don’t let that throw you, they all mean the same thing. For our purpose well call it the aerobic energy cycle.

This is the main energy production pathway in the body. Energy is a molecule called ATP and it is formed via breakdown of glucose (carbs), fats and proteins (amino acids) that enter and go through these pathways. The aerobic energy pathway requires oxygen to work, it is at one end of the energy production spectrum. It has always been assumed this pathway is only utilized when performing long, slow duration exercise like cycling, walking, jogging etc.

At the other end is the anaerobic pathway that doesn’t utilize oxygen. This energy system is used for short, fast, all out exercise 30 seconds or less like sprinting, a slam-dunk, or a hard, heavy set in the weight room. There are also many related energy pathways in between these two. Recently reviews have provided some valuable info regarding these pathways and their impact on building muscle.

1. Energy (ATP) production is far more complex than previously assumed. That, in fact ATP production and regeneration for muscle contraction is formed by a complex integration of all energy pathways. No matter what type of activity you perform ATP is regenerated by precise interplay of every energy pathway. The aerobic energy pathway is shown to be highly involved in regenerating ATP when weight training. This is a revolutionary finding as most experts assumed weight training is purely an anaerobic activity. The fact is intense anaerobic exercise like weight training taxes all energy production pathways, big time!

2. This is a big problem if you are trying to build muscle. All energy pathways have steps or stages. Each step utilizes particular amino acids. The harder you train in any activity, the more you use up (metabolize) these amino acids. The problem is, these particular amino acids namely glutamate, glutamine, valine, isoleucine and leucine are also critical components of muscle growth. Research demonstrates utilization of these amino acids during and after exercise for energy production can be so extensive, little or no amount is left to effect muscle growth!

3. When the body does need these amino acids for energy production pathways it breaks down muscle to get them! This is precisely what a hard training athletes or body builder does not want and, this is why anyone that trains intensely needs protein supplementation. If you can supply the right amino acids (and it takes all 20, not just the five we’ve previously mentioned) at this critical time, you can offset the dramatic muscle breakdown that usually occurs and actually stimulate the mechanisms that produce awesome gains in muscle.

4. However the problem lies in the ability of the protein supplement to get to the muscle fast, at precisely the right time. A precise peptide bound amino acid whey protein formulation is proven by research to be absorbed and transported to muscle faster and in greater amounts than any protein or free form amino acid mix and produces the most dramatic gains in muscle.
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Canuck Singh
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