08-23-2005, 8:46 AM
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pu12en12g
Joined on 08-23-2005
Posts 9
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Re: Water intake / Cell volumization... the ultimate supplement
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Cell Volume and Muscle Growth - Part I
Implications for Nutritional Supplementation
By John M Berardi
Gym "experts"
When most gym rats talk about getting bigger they are obviously
referring to muscle growth or hypertrophy. Often, however they don't
really have a clue as to what's happening within their muscles in order
to make them bigger and stronger. For all they know little muscle
fairies sneak into their rooms at night and when they wake up in the
morning, voila, they're bigger. Without fail, though, this never seems
to stop the most ignorant of them from throwing around their lack of
information with poorer form than the 20 lb dumbbells they use for
"cheat" curls. And although I'm not the most brilliant guy in the
world, I consider myself fairly knowledgeable at the iron game. For
some reason, though, I seem to be a target for these gym "experts" as
they are continually instructing me as to how to train and diet!
One comment that I hear pretty often that never ceases to amaze me is
the comment many gym "experts" make regarding creatine. Perhaps you
have heard it too. It goes something like this "So whaddya think about
that creatine stuff? I tried it and yea it'll put some pounds on ya,
but it's all water weight and I don't like to feel bloated. Besides,
you lose it all when you go off anyway". (Its amazing how the statement
they wish to make is always posed in the guise of a question as if they
really wanted my opinion). Well at this point rather than respond to
the "question" I usually thank them for the info and let them know that
they just saved me a lot of wasted time and money on such a worthless
supplement.
As an educator, I should be a little more understanding, but when I'm
in the middle of a squat workout in which I am taking 60 second rest
periods between sets, I really don't have time to reprogram Biff and
his anti-creatine chronies.
In all honesty Biff is right (god I hate to admit it) about one thing;
the first few pounds gained when taking creatine are probably just a
result of increased water weight. BUT the bloated feeling Biff is
referring to is probably not a result of his creatine intake but
probably from his 6 Budweiser and his Bucket o' ribs at Sizzler last
night. The reality of the situation is that an increase in water weight
from creatine isn't such a bad thing. In fact if that water weight
happens to be intracellular fluid (which it often is) not only should
that water weight lead to increased strength, but it should also lead
to increased protein synthesis, increased muscle mass, and long term
growth. Let me explain:
What exactly is muscle growth? Hypertrophy vs Hyperplasia
To begin, I'd like to cover the two main ways for an individual to
increase overall muscle size. The first, muscle fiber hypertrophy,
refers to the increase in the diameter of the individual muscle cells.
The larger the cells, the larger the overall muscle, it's that simple.
Muscle fiber hypertrophy = Big muscle fibers.
The second, muscle fiber hyperplasia, refers to the splitting of muscle
fibers in the interest of creating new fibers. Obviously this would be
of interest to anyone pursuing size or strength due to the fact that
and if an individual has more fibers, their overall size potential is
greater. Therefore when looking at hyperplasia, Muscle fiber
hyperplasia + Muscle fiber hypertrophy = Many big muscle fibers.
At this point, I know that you're all supercharged to learn how to both
make more fibers and to make them bigger, but I'm going to have to put
the breaks on and be the bearer of bad news. The problem with
hyperplasia is that no one really knows exactly how to promote it. Once
we are born, some experts believe, muscle fiber number remains fixed
for our lifetime. Therefore under normal circumstances muscle fiber
hyperplasia seems nearly impossible.
nterestingly, though, experts have begun to speculate that under
abnormal circumstances hyperplasia can contribute to overall muscle
growth. For starters, recreational or even moderately intense weight
training will probably NOT do it. Unfortunately there has not even been
any evidence that very intense weight training will promote
hyperplasia. One proposed link to hyperplasia, though is anabolic
steroid use. A recent article in the American College of Sports
Medicine's Medicine and Science in Sport and Exercise found evidence
for muscle fiber hyperplasia in anabolic steroid using powerlifters(1).
This however, is pretty much the first evidence of a mechanism for
hyperplasia in humans. The bottom line is that unless we are ready to
boatload anabolic steroids into our systems, neither you nor I are
going to be enjoying the benefits of muscle fiber hyperplasia any time
soon. So what about hypertrophy? Well that, my friends, is a reality.
Two types of hypertrophy?
Let's address the 2 main forms that muscle fiber hypertrophy can take.
Muscle fiber hypertrophy can be accomplished by either increasing the
volume contained within the muscle cell or by increasing the actual
amount of muscle contractile protein making up the muscle cells. To
give a simple analogy to help differentiate between the two types of
hypertrophy, one can think of the muscle cell as a water-filled
balloon. To make the balloon bigger (hypertrophy), one can either add
more water to the balloon, thereby stretching it to its maximum
capacity (increase cell volume) or one could theoretically add more
balloon material to make the overall size of the balloon larger
(increase in contractile protein). Although the mechanisms that cause
increased cell volume and increased contractile protein content may be
different, both are affected by weight training and there seems to be a
link between the two that bodybuilders may be able to exploit in order
to cause lasting muscle growth
First and foremost, when we talk about hypertrophy, we are most often
referring to the second type mentioned above - an increase in
contractile protein (adding more material to the balloon). This type of
hypertrophy is the most lasting since it constitutes a remodeling of
the muscle fibers, making them permanently bigger than before (assuming
you continue to train, of course). Muscle increases of this type are
not only asthetically pleasing, but also contribute significantly to
strength. The more fibers available to contract, the more weight can be
lifted!
But what about the other type of hypertrophy? Well let's put it this
way; how many of you wish that your muscles looked as good outside of
the gym as they do in the gym after a great skin-stretching "pump"? I
know that when I was younger, I wouldn't even take one step out onto to
the beach without doing some pushups first in order to "get a little
blood into the muscle". This phenomenon, the infamous "pump", is a
short-lived example of increased cell volume. Fluid moves into the cell
thereby causing it to stretch, take up more space, and make you look
pretty darn good. Unfortunately, such increases in cell volume
disappear almost as quickly as they came. The good news is that there
are other ways to increase cell volume for longer periods of time.
The increases in cell volume and their contribution to muscle growth
that I wish to address are brought about by naturally by increases in
cellular water; increases in the cellular storage of substrates such as
carbohydrates, lipids, or amino acids; and increases in the cellular
movement of ions like sodium and potassium. Research has shown that
supplements like creatine, glutamine, and ribose can also lead to
increases in cell volume by both increasing their own content within
the cell but also by attracting water into the cell, causing cell
swelling (2,3,4,5).
What's the big deal with increased cell volume or cell swelling?
If you've read any of my previous articles, you know that I'm big on
citing research, for without quality research, our attempts at finding
out the truth about how our universe operates are merely stabs in the
dark. (Kind of like Biff's attempt at rational thought.) This research
focus applied to the cell volume question has produced quite a bit of
very interesting research that has and is bound to continue to
dramatically impact the fitness and sports nutrition industry.
Initially cell volume studies focused on the cells of the liver since
the liver is the most important organ for whole body metabolic
regulation (3,5,6).
What these studies found was that independent of hormone influence or
substrate influence, decreased cell volume (cell shrinking) lead to
cellular catabolism or protein breakdown, while increased cell volume
(cell swelling) led to anabolism or protein synthesis. In this regard,
the original authors of such papers concluded that cell swelling or
shrinking acted as a "second messenger to tell the cell what to do
about protein synthesis. Basically, the hormones tell the cell to swell
or shrink and it is this swelling or shrinking, not the hormone's
action, that leads to changes in protein metabolism.
These findings were particularly exciting for muscle physiologists
because this link could be explored in many clinical populations such
as burn victims who are extremely catabolic and the elderly who tend to
lose large amounts of muscle mass. Although the muscle research has
mostly focused on catabolism rather than anabolism, a few important
"take home" findings are evident. First is that decreased body water
and intracellular nutrients can lead to cell shrinking and as we now
know, increased muscle protein breakdown (7). Therefore by maintaining
normal hydration and maximal substrate storage with ample fluid
consumption and nutrient intake, an individual can easily prevent a
great deal of protein breakdown. Also, although experimentally
unproven, increased
cell volume above normal hydration may lead to increases in muscle
protein content. This is where supplements, especially those consumed
immediately after bouts of intense exercise, come into play.
References
(1) F Kadi, A Eriksson, S Holmner, LE Thornell. Effects of anabolic
steroids on the muscle cells of strength-trained athletes. Med Sci
Sports Exerc 1999 Nov; 31(11):1528-34
(2) Tim Ziegenfuss, Lonnie Lowery, and Peter Lemon. Acute fluid volume
changes in men during three days of creatine supplementation.
JEPonlineVol 1 No 3 1998
(3) Dieter Hauussinger, Florian Lang, Kathrin Bauers, and Wolfgang
Gerok. Interactions between glutamine metabolism and cell-volume
regulation in perfused rat liver. European Journal of Biochemistry
1989; 89: 1153
(4) Dieter Hauussinger, Erich Roth, Florian Lang, and Wolfgang Gerok.
Cellular hydration state: an important determinant of protein
catabolism in health and disease. Lancet 1993; 341: 1330-1332
(5) Ingwall, J.S., C.D. Weiner, M.F. Morales, E. Davis, and F.E.
Stockdale. Specificity of creatine in the control of muscle protein
synthesis. J Cell Biol 1974;63:145-151.
(6) Deiter Haussinger and Florian Lang. Cell volume in the regulation
of hepatic function: a mechanism of metabolic control. Biochemica et
Biophysica Acta 1991; 1071: 331-350
(7) Barbera Stoll, Wolfgang Gerok, Florian Lang, and Dieter Haussinger.
Liver cell volume and protein synthesis. Biochemical Journal 1992; 287:
217-222
(8) S.M. Hughes, and S. Schiaffino. Control of muscle fiber size: a
critical factor in ageing. Acta Physilogica Scandinavica 1999; 167 (4):
307
http://www.biochemj.org/bj/313/0697/3130697.pdf
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