Are sports drinks actually better for your performance than a glass of water?

Food & Drink · Published 3 October 2026 Swipe more like this →

In short: Sports drinks promise to replenish electrolytes and boost endurance, but scientific consensus remains elusive. While they are marketed as essential for athletes, evidence suggests their performance benefits are often overstated. In many cases, these sugar-sweetened beverages may do more harm than good, especially when consumed without prolonged, intense physical activity.

Sports drinks are categorized by their osmolarity—the concentration of particles like salt and sugar relative to human blood. Isotonic drinks match blood concentration, hypertonic drinks are more concentrated, and hypotonic drinks are less concentrated. A 2021 systematic review indicated that hypotonic solutions, which contain lower levels of sugar and moderate sodium, are most effective at maintaining hydration during continuous exercise by minimizing plasma volume loss.

Despite their popularity, the health implications of these drinks are significant. They are classified as sugar-sweetened beverages, often containing two-thirds the sugar of a standard soda. Regular consumption is linked to weight gain, type 2 diabetes, and dental erosion. Furthermore, research shows they do not protect against hyponatremia, a condition of low blood sodium, because their sodium concentration—typically 20 to 30 meq/L—is insufficient to prevent it. Some studies even suggest that dairy milk may offer superior recovery benefits for muscle protein synthesis and rehydration compared to standard carbohydrate-electrolyte alternatives.

The market for these beverages has exploded since the 1960s, growing by over 240% globally between 2004 and 2009. Historically, the approach to fluid intake has shifted dramatically; in the early 1900s, many believed drinking water during exercise was unnecessary. It was not until A.V. Hill’s 1923 research on thermoregulation that the importance of fluid replacement gained scientific traction. Today, the FDA does not distinguish between sports drinks and energy drinks, the latter of which often contain high levels of caffeine and lack transparent labeling regarding their ingredients.

Regulatory scrutiny has also increased, particularly regarding additives. In July 2024, the FDA revoked authorization for brominated vegetable oil, a stabilizer previously found in some citrus-flavored drinks. While major brands like Gatorade and Powerade phased out this ingredient years earlier, the shift highlights the evolving understanding of what goes into these functional beverages. Ultimately, while they target young athletes, the evidence suggests that for most people, the risks of excess sugar intake may outweigh the performance gains.

General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.

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