What is Creatine?
Creatine is not an herb, mineral, vitamin, hormone, or
steroid. Creatine is a natural nutrient found in our bodies and the bodies of
most animals. The chemical name for Creatine is methyl guanidine-acetic acid.
Creatine is made up of three amino acids - Arginine, Glycine and Methionine.
Our liver has the ability to combine these three amino acids and make creatine.
The other way we get creatine is from our diet or through supplements.
Approximately 95% of the body's creatine supply is found in the skeletal muscles.
The remaining 5% is scattered throughout the rest of the body, with the highest
concentrations in the heart, brain and testes.
So what does creatine do?
First, before we answer this question you must understand
that the theory of what creatine does is just a theory. It is amazing how
little we actually know about what goes on in our body. Anyway, we will outline
what the majority of research currently agrees on in terms of what role
creatine plays in our body.
1. Provide additional energy for your muscles
In your body you have a compound called ATP (adenosine
tri-phosphate). Think of ATP as an energy-containing compound. What is
important to know about ATP is that the body can very quickly get energy from
an ATP reaction. You have other sources of energy such as carbohydrates and fat
- but they take longer to convert into a useable energy source. When you are
doing an intense quick burst activity - such as lifting a weight or sprinting,
your muscles must contract and need a quick source of energy. This immediate
energy comes from ATP.
When your muscles use ATP for energy a chemical process
happens where the ATP is broken down into two simpler chemicals ADP (adenosine
di-phosphate) and inorganic phosphate. This process of ATP turning into ADP
releases the energy, which gives your muscles the ability to contract.
Unfortunately, we do not have an endless supply of ATP. In fact, your muscles
only contain enough ATP to last about 10-15 seconds at maximum exertion. In case
you were wondering - no, the ADP cannot be used to create more energy for your
muscles.
Here is where the creatine comes in - or more specifically
the creatine phosphate. Creatine phosphate is able to react with the ADP in
your body and turn "useless" ADP back into the "super
useful" energy source - ATP. More ATP in your body means more fuel for
your muscles.
2. Volumization of your muscles
Looks like we just made up that word
"volumization" doesn't it? Actually, it's just a fancy name for the
process of pulling fluid into the muscle cells and thus increasing the volume
of the muscles. Creatine has been shown to pull water into your muscle cells,
which increases the size of your muscles. Don't get too excited - it is not
clear how great an effect this has. Point #1 is a much clearer benefit of
creatine.
3. Buffer Lactic Acid build-up
New research has shown that creatine can help buffer lactic
acid that builds-up in the muscles during exercise. This leads to that nasty
burning feel you get in your muscles. Scientifically it is a complicated
process - basically the creatine bonds with a Hydrogen ion and that helps delay
the build up of lactic acid. More research needs to be done to see if this
point is true.
4. Enhances Protein Syntheses
There is some data to indicate that creatine helps put the
body in a more anabolic state where protein synthesis can occur. The more
protein synthesis - the greater the muscle gain.
Well - there you have what creatine does in a very
simplified nutshell. Of all 4 points - point #1 is the most use of creatine in
the body. The other points are more debated but still look to be valid.
When and How Much Creatine Should I Take?
In the different studies that I reviewed regarding Creatine
Monohydrate dosages, 2 studies showed significant increases in phosphocreatine
stores within the muscle by way of biopsy samples, and indicated that the
optimal dose is between 20 and 30 grams per day, divided into 4 daily doses. I
would recommend that if you are over 200 pounds, lean towards the higher dose
and if you are less than 200 pounds, lean towards the lower dose. Most studies
were short-term and therefore did not indicate a loading dose versus a
maintenance dose. While the popular theory has been to cut the loading dose in
half, I recommend that you maintain at least a 20-gram dose at all times. All
the studies I reviewed that showed a substantial store of phosphocreatine
within the muscles were conducted using at least a 20-gram dose throughout the
study.
When creatine was first introduced it was relatively
expensive, which may have been the inspiration for lowering the initial dose.
Now it is available for under $40 per kilo. Even at the higher dose, this is
more than a 30-day supply. I think the hardest part of maintaining this dosage
is the 4 times per day suggestion. If this is convenient, then do it. But if
this presents a problem, then take the recommended dose in at least 2 daily
doses.
What happens to creatine that is not used by the body?
Excess creatine is eventually converted into the waste
product creatinine and excreted from the body.
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