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How SportLegs Works

SportLegs® really work. That's why they're guaranteed.  But how can anything so safe work so well?

One of the first things modern car tuners do to extract more performance is to reprogram the conservative stock rev-limiter chip.  You saw how SportLegs raises your Anaerobic Threshold "redline" in the graph on the last page.  Yet compared to people who try to do the same thing by taking painkillers before sports, taking SportLegs is much safer:  You don't reduce your body's sensitivity to the early warning signs of injury.  In fact, by reducing the lactic acid accumulation that is the major component of sports muscle pain, you've raised your ability to notice any early warning signs of injury.

As of 2004, exercise physiology professors teach that your body's Lactic Acid System is your main source of energy during the "sprint" part of "multiple-sprint" sports.  Like skiing.  Soccer.  Motocross.  Ice hockey.  Field hockey.  Lacrosse.  Or any sprint-length event, like Track.  Swimming.  Hill climbs on a mountain bike... or a road bike.  Wrestling.  Baseball.  Football...

Your body's Lactic Acid Sytem is what supplies energy whenever you're trying to exceed your opponent.  Whether your opponent's name is Bob, Gretchen, gravity, your personal best, or Father Time.  Taking SportLegs an hour before your first run, game or event helps tune your body's Lactic Acid System to do that a little better, with a lot less pain.  Here's why...

With the aid of radioactive isotope tracers, scientists have discovered the useful function of the Lactic Acid System (the "lactate shuttle"):  Muscles continuously produce and consume lactate as their preferred high-speed energy nutrient.  And during exercise, muscles actually produce more of this high-speed energy currency than they consume.  The problem SportLegs addresses is that the lactate produced by muscles is more acidic (thus termed lactic acid) than the lactate consumed by muscles:

“During short-term, high-intensity exercise, lactate accumulates as the result of lactic acid production being greater than its removal.  At a physiological pH, lactic acid, a strong organic acid, dissociates a proton (H+).  It is the H+ rather than the lactate ion that causes pH to decrease. Although lactate accumulation in blood is directly related to H+ accumulation in blood because the muscle cell membrane exports into blood both lactate anions and protons, in muscle the cause of acidosis is different.  All the glycolytic intermediates of glycolysis are weak organic acids and dissociate protons.  Further, as pointed out by Gevers (1977), the degradation of ATP results in H+ formation.  Thus, lactate accumulation is associated with acidosis for more than one reason, but it is important to recognize that it is unbuffered protons (i.e., H+) and not lactate anions that pose difficulties for the performer.  The H+ accumulation resulting from glycolysis and ATP catabolism as the result of lactic acid production can have several negative effects… [T]he lower pH may…slow glycolysis,… [interfere] with muscle contraction,…and stimulate pain receptors… Within the blood itself, H+ inhibits the combination of O2 with hemoglobin in the lung…  Hydrogen ion liberated into the blood and reacting in the brain causes severe side effects, including pain, nausea and disorientation.” 1

So it’s the acidity of this acidic lactate, or lactic acid, that causes the “burning” sensation familiar to seasoned athletes and weekend warriors alike.  Worse, related research has shown as it becomes more acidic, it travels across cell boundaries less quickly.  The “lactate shuttle” slows to a crawl, and lactic acid pools in your muscles. And you hurt. Worse still, you feel “out of gas”:  The energy represented by your lactic acid isn’t as readily exchanged as fuel.  So instead of powering your victory, it sits in your muscles, manifesting itself as evening ache, night cramping and even soreness the next day. Unless you’d taken SportLegs beforehand…
How SportLegs helps you do more, and hurt less.

The pure power of SportLegs is unlocked by your body’s natural digestive process.  When you take the premium, balanced calcium and magnesium salts of lactic acid inside SportLegs vegetarian capsules, these lactates are delivered to muscle tissues in an alkaline form:

 “Because lactate is combusted [metabolized] as an acid (C3H6O3), not an anion (C3H5O3), the combustion of an externally supplied salt of lactic acid (CHO3H5O3¨+H++3O2?3H2O+3CO2) effects the removal of the proton taken up during endogenous lactic acid production (Gladden, L. B. and J. W. Yates, J. Appl. Physiol. 54:1254-1260 (1983)).  A side benefit of alkalizing the plasma by feeding lactate [is] to enhance movement (efflux) of lactic acid from active muscles into plasma, a process which is inhibited by low (relative to muscle) blood pH (Brooks, G. A. and D. A. Roth, Med. Sci. Sports Exerc. 21(2):S35-207 (1989); Roth, D. A. and G. A. Brooks, Med. Sci. Sports Exerc. 21(2):S35-206 (1989)).  Moreover, maintenance of a more normal blood pH during strenuous exercise would decrease the performer’s perceived level of exertion.  The conversion of lactate to glucose in the liver and kidneys also has alkalizing effects by removing two protons for each glucose molecule formed (2C3H5O3+2H+?C6H12O6).  Thus, whether by oxidation or conversion to glucose, clearance of exogenously supplied lactate lowers the body concentration of H+, raising pH.”2  …thus helping naturally counter the painful, frustrating acidity of lactic acid.  And since “lactate removal is concentration-dependent; lactic acid needs to be raised to a higher level to force its removal”3,  taking SportLegs before exercise can help prepare your body to increase its lactate removal.

Safer than aspirin, Tylenol®, Advil® or Aleve®

SportLegs vegetarian capsules contain nothing but European natural-source calcium and magnesium “lactate salts” that are so safe they qualify as FDA “Generally Recognized As Safe” (“GRAS”) food additives.  That’s safer than aspirin, acetaminophen (Tylenol®), ibuprofen (Advil® or Motrin®), and even naproxen sodium (Aleve®).  And these over-the-counter pain relievers can cause well-documented side effects:  Reyes Syndrome.  Blood thinning.  Liver damage.  Kidney damage.  In comparison, the net calcium and magnesium SportLegs capsules contribute are good for you.

Still, it’s smart to check with your doctor before taking ANY supplement.

Brooks, G. A., T. D. Fahey, T. P. White and K. M. Baldwin. Exercise Physiology: Human Bioenergetics and Its Applications,. 3rd Edition.  pp. 804-805. Copyright 2000 The McGraw-Hill Companies, Inc.

2. Brooks, G. A. “Method and Composition for Energy Source Supplementation During Exercise and Recovery”, U. S. Patent #5,420,107, 1995.

3. Brooks, G. A., T. D. Fahey, T. P. White and K. M. Baldwin. Exercise Physiology: Human Bioenergetics and Its Applications, 3rd Edition.  p. 211. Copyright 2000 The McGraw-Hill Companies, Inc.

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