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Training in summer without melting: the anti-dehydration guide

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Equipo Victoris
Redacción de Victoris · 9 Jul 2026 · 6 min
Runner drinking water from a bottle outdoors under the summer sun

In July the heat shows no mercy. Here are the dehydration signs people ignore and when water is enough versus when you need electrolytes.

July arrives with its glorious mornings and its thirty-something-degree afternoons that melt you the moment you step outside. Training in summer is entirely possible — even enjoyable if you use your head — but the heat doesn't forgive slip-ups. Dehydration is silent, sneaky and drops your performance before you notice. Let's keep you from melting halfway through your session.

Drink before you're thirsty

Here's the classic mistake: waiting until you're thirsty to drink. By the time thirst shows up you're already behind, because it's a sign dehydration has begun. The sensible strategy is to hydrate before, during and after exercise, in small sips, without waiting for your body to sound the alarm. As a general reference, around 2 to 2.5 litres of water a day is the usual figure, and quite a bit more if you train hard or sweat buckets.

The signs almost everyone ignores

Dehydration doesn't always shout; sometimes it whispers. Pay attention, because losing just 2% of your body weight in sweat already penalises your performance. Learn to spot the red flags before things escalate, so you know when to ease off the pace or stop in the shade.

Signs you need to hydrate right now

  • Obvious thirst, dry mouth and thick saliva.
  • Headache, dizziness or feeling foggy.
  • Dark, scarce urine (pale urine is a good sign).
  • Cramps, fatigue that doesn't match the effort, or very hot skin.
  • Your heart rate spikes and a pace that used to be easy now feels hard.

Water isn't the reward after your session: it's part of the session. Treat it like your trainers, not an optional extra.

Sporting common sense

Water or electrolytes?

This is where people fret more than they need to. For most sessions under an hour, water is more than enough. Electrolytes (sodium, potassium and company) come into play when the effort is long, very intense or you're sweating heavily, because with sweat you lose not only water but salts too. In those cases, an electrolyte drink helps replace what's gone and stave off cramps. And you don't have to rely only on a bottle: water-rich fruit and veg like watermelon, melon or cucumber hydrate you and throw in minerals for free.

Tips so you don't obsess

Hydrating well doesn't mean living glued to a bottle in a panic. Train first thing or at sundown, dodge the middle of the day, seek shade, wear light breathable clothing, and go easy on caffeine and, of course, alcohol, which both work against you. With a little planning, summer stops being your enemy and becomes the perfect excuse to train early and enjoy breakfast afterwards with the satisfaction of a job done.

Source: Infobae
linkSource: Infobae

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