Hydration Guides & Resources

General guidelines suggest 400–800 ml (14–27 oz) per hour during moderate to intense exercise, depending on your sweat rate, body size, and environmental conditions. Sip regularly rather than drinking large amounts at once. Your individual sweat rate (calculated through a test) should guide your specific intake.

For activities under 60 minutes, plain water is usually sufficient. For longer sessions (especially in heat), adding sodium and carbohydrates helps with fluid absorption, taste palatability, and maintaining blood glucose. Sports drinks or electrolyte solutions improve performance and endurance.

Drinking excessive amounts of plain water in a short period can dilute blood sodium levels (hyponatraemia). Avoid this by drinking to thirst, limiting intake to what your sweat rate demands, and using electrolyte solutions for extended exercise. Monitor your body weight — losing more than 2% is unhealthy; gaining weight suggests overhydration.

Cold weather doesn't eliminate fluid needs—you still sweat under layers and lose moisture through breathing. Warm fluids (herbal tea, warm sports drink) are more palatable and encourage drinking. Keep bottles insulated, plan intake breaks, and drink small amounts regularly, even if thirst isn't obvious.

Absolutely. Proper hydration maintains blood volume, regulates core temperature, and delivers nutrients to muscles. Studies show that even 2% dehydration reduces aerobic performance and increases perceived effort. Developing a consistent hydration strategy matched to your sweat rate can significantly improve endurance performance and reduce fatigue.

Running bottles (handheld or belt-mounted), backpack hydration systems, and bike-mounted bottles each suit different activities. Handheld bottles work for short runs; hydration packs suit trail running and hiking; bike bottles are essential for cycling. Choose based on comfort, capacity needs, and how easily you can drink while moving. Keep bottles clean and replace regularly to prevent mould.