Hydration Science: More Than Just Drinking 8 Glasses

Avoid one-size-fits-all drink rules

Fluid needs vary with the activity, environment, duration and individual circumstances. A short comfortable workout and a long session in hot conditions are different planning problems. Neither a fixed sodium dose nor drinking as much water as possible is a universal solution.

Plan access before you start

Check whether you can obtain drinks during the session, especially when exercising outdoors or away from your usual gym. Note the expected weather and whether your route has opportunities to stop. Preparation is more useful than reaching the end of a difficult session without any practical way to adjust.

Treat supplements as optional tools

Electrolyte products differ in their ingredients and serving sizes. Read the label rather than assuming that every sports drink contains the same amount. Do not treat a product as a guarantee against cramps or heat-related problems. Seek individualized advice when medical conditions, medications or demanding endurance events affect your needs.

Record context, not a perfect score

Keep brief notes about the session, conditions and how the drinking plan worked. Use those observations to improve your next plan, without assuming that an app can diagnose hydration from a single tag. Fortiva can help organize wellness notes alongside training. If you feel unwell during exercise, stop and respond to the symptoms rather than continuing because a tracker says your plan is complete.

Tools and further reading

Explore the related Fortiva coaching tools to organize your own plan.

NIH Office of Dietary Supplements: exercise and athletic performance. This guide offers general educational information and has not been presented as a clinical assessment.