Hydration
Drink Enough. Feel the Difference.
Water needs, dehydration signs and training-day drinking — hydration without overthinking.
Featured Hydration Guide
How Much Water Do You Actually Need?
Beyond eight glasses: personalizing fluids for body size, climate and training.
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The Hydration Guide
The Complete Hydration Guide
Needs, signs, training days and heat — everything about water in one place.
Read the Full GuideAbout Hydration
Water regulates temperature, carries nutrients and keeps the brain sharp — and most people walk around mildly under-drunk. Pale-yellow urine is a better guide than any fixed number.
Front-load fluids in the morning, keep water visible all day, and add roughly half a liter per hour of training.
Hydration FAQ
How much water per day?
Two to three liters of total fluids suits most adults, more in heat or around training — food counts too.
Does coffee dehydrate you?
Barely — regular coffee drinkers retain most of it. Count it toward fluids, then drink water alongside.
What are early dehydration signs?
Dark urine, afternoon headaches, fatigue and chipped concentration — all before real thirst arrives.
Do I need sports drinks?
Only for sessions over an hour or heavy sweating. For most training, water plus normal meals suffices.