Collection: Heatwave Hydration

Hot weather can make even a steady session feel like you’ve accidentally entered a desert ultra.

Your heart rate climbs faster. Sweat rate goes up. Effort feels harder. And the fuelling plan that worked perfectly in spring can suddenly feel a bit optimistic.

The good news? You do not need to stop training every time the temperature rises. You just need to train smarter.

Here are our top tips for staying cool, hydrated and properly fuelled during a heatwave.

Read top tips here.

A: It activates TRPM8 receptors—your brain reads that as cool air and clearer breathing (McKemy, Neuhausser & Julius, 20)

Learn more.

Absolutely. Dehydration reduces cardiovascular efficiency and increases perceived effort, both of which negatively impact high-intensity performance.

Hydrate here.

A: For hot weather training, use a hydration product that provides fluids, carbohydrates and electrolytes. KMC ISO MIX is designed to support hydration during runs, rides, races and long outdoor sessions.

A: Yes. When you sweat, you lose fluid and electrolytes, especially sodium. Replacing both is important during hot runs, rides, hikes and races. Plain water can help with fluid, but electrolyte drinks are usually more useful when you are sweating heavily or training for longer.

Yes. A simple approach is to sip ISO MIX regularly from your bottle and use KMC NRG Gels when you need extra carbohydrate energy. This works well for longer runs, rides, races and hot-weather sessions where you need both hydration and fuel.

A: Yes. Mint contains menthol, which can activate cold receptors in the mouth and airways, creating a cooling sensation. That does not replace proper hydration, electrolytes or sensible heat management, but mint-flavoured sports nutrition can feel refreshing during hot sessions.

Read more: Can Mint Improve your performance in the heat?

A: For most athletes, ISO MIX is the best place to start because it supports hydration with carbohydrates and electrolytes. For longer sessions, combine it with KMC NRG Gels, refillable gels or bars depending on your sport, session length and intensity.

A: Train early in the morning or later in the evening where possible. Avoid the hottest part of the day, especially between late morning and mid-afternoon. If conditions feel unsafe, reduce the intensity, shorten the session or move it indoors.

A: Yes. Heat increases the demand on your body, so your fuelling plan should be simple, practised and easy to follow. Keep drinking regularly, replace electrolytes, and take on carbohydrates before you feel empty. Do not wait until you feel thirsty, flat or overheated.

A: Yes. Refillable gels are useful for regular summer training because you can carry your preferred KMC gel flavour in a soft flask, reduce single-use packaging and fuel longer sessions more easily.