What this means in real training
Why the claim sounds convincing
Common hydration-product decision that should depend on duration, heat, sweat, diet, and medical context.
The mistake is turning a possible mechanism, average association, or useful option into a universal rule.
What the evidence supports
No. Many ordinary short workouts need only normal meals and water; heat, duration, sweat rate, and repeat sessions change the need. The relevant evidence needs to match the exact population, intervention, comparison, and real-world outcome instead of borrowing certainty from a mechanism, acute response, or marketing label.
Which sessions and environments benefit from added sodium or carbohydrate compared with ordinary fluids and meals?
Mechanisms, short-term measurements, and anecdotes can explain interest, but they do not automatically establish long-term benefit or safety.
The useful verdict depends on dose, training status, baseline habits, adherence, and whether the measured outcome matches the promise.
How to use the answer
Use electrolytes when the session and environment justify them, not because every workout drink needs a supplement label.
Study populations, protocols, outcome definitions, and follow-up periods vary.
Averages do not guarantee the same response for an individual reader.
Pain, illness, pregnancy, medication use, or medical exercise restrictions can change the practical decision.