Myths

Alkaline water will not change your body's pH or your performance

Your body keeps blood pH within a tight range no matter what you drink. Alkaline water is just water, usually with a higher price tag.

Alkaline water is marketed with promises of better hydration, faster recovery, less fatigue and even protection from disease, often based on the claim that modern diets make the body too acidic. The idea sounds scientific, but it misunderstands how the body handles acid and base. Blood pH is held between about 7.35 and 7.45 by powerful buffer systems, the lungs and the kidneys. If it moved far outside that range, you would be seriously ill, not slightly less energetic.

Whatever you drink meets strong stomach acid within minutes, which neutralizes the small amount of extra alkalinity in alkaline water. The kidneys then fine-tune any remaining difference and excrete it in the urine. Diet can change urine pH, which is why some people see test strips shift, but urine pH does not reflect blood pH. Studies on athletes have not shown meaningful improvements in performance or recovery from drinking alkaline water compared with ordinary water.

There is a genuine buffering strategy in sports science, but it is different: sodium bicarbonate taken in specific doses before short, intense efforts can delay fatigue in some athletes, at the cost of possible stomach upset. Alkaline water contains nowhere near those amounts. For everyday training, drink clean tap or bottled water in quantities that keep you comfortable, add electrolytes during long sweaty sessions, and spend the money saved on good food instead.

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