CLINICAL KNOWLEDGE MAGAZINE
3 min read
Exercise-induced dehydration – the hidden yet severe health risks you should recognize
Tim Klein
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Diets Premium Medical Expert • 24.09.2026
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Scientifically reviewed by a clinical dietitian:
This article has been peer-reviewed for adherence to IŻŻ, WHO, and PTGiP clinical nutritional standards.
| CLINICAL KNOWLEDGE MAGAZINE CLINICAL KNOWLEDGE MAGAZINE | min read 3 min |
| Diets Premium Medical Expert Tim Klein | Scientifically reviewed by a clinical dietitian 24.09.2026 |
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Key Takeaways
Individuals engaged in regular physical activity must prioritize maintaining adequate hydration levels to support bodily functions. Intense exercise triggers substantial losses of both water and critical electrolytes—including sodium, potassium, and magnesium—through sweat and respiration. The severity of dehydration is categorized based on the percentage of total body fluid deficit, ranging from mild to moderate and, in extreme cases, severe, which may disrupt fundamental homeostatic processes. An imbalance in water-electrolyte equilibrium not only compromises physical performance but also poses tangible threats to cardiovascular stability, neurological function, and the body’s ability to regulate core temperature effectively.
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Drying
Water is a vital part of all living organisms. It has many important biological and physiological functions in the human body. It is the environment for most metabolic processes in the body, is the building material of cells and tissues, participates in the intra-system transport of nutrients and also plays an extremely important role in regulating body temperature.
Dehydration during training effects
Disruption of the water-electrical economy, even if it does not prevent continuing training, clearly leads to a significant decrease in exercise capacity. Physical effort in a dehydrated state negatively affects the functioning of the blood system and can also lead to overheating of the body. It is worth mentioning that a lack of fluid impairs the absorption of nutrients and makes it difficult to clear the body of harmful substances.
What to drink for training?
In addition to exercising water, we also lose the electrolytes necessary for our body to function properly, especially sodium, which we should supplement. It turns out that moderately or highly mineralized water is not sourced, can be an excellent solution for people who exercise at a low intensity, not more than an hour.
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Tim Klein
Diets Premium Medical Expert
Member of the Diets Premium clinical editorial board. Specializes in medical diet therapy, metabolic health, and nutritional planning.
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