Water alone isn’t always enough — especially when you sweat hard. Here’s when electrolytes matter and how to hydrate properly.
Quick answer: Electrolytes (sodium, potassium, magnesium) keep your fluid balance, muscles and nerves working. You need them most during long or sweaty sessions over ~60–90 minutes, in the heat, or if you’re a heavy sweater — not for every short workout.
What electrolytes do
Electrolytes are minerals that carry an electrical charge and regulate hydration, muscle contractions and nerve signals. You lose them in sweat — sodium most of all — which is why plain water doesn’t fully rehydrate after heavy sweating.
When do you actually need them?
Sessions longer than ~60–90 minutes
Training in heat or humidity
Heavy or “salty” sweaters (white marks on kit)
Recovering after illness or a big sweat loss
For short, everyday workouts, water and a balanced diet are usually enough. When you do need a top-up, Electro-Lite is a convenient effervescent option, and a carb-electrolyte drink like Creatine Boost suits longer efforts.
A simple homemade electrolyte drink
Mix 500ml water, a pinch of salt, a splash of fruit juice (for carbs and potassium) and a little honey. Cheap, effective and easy for longer sessions.
Frequently asked questions
Do I need electrolytes for every workout?
No — mainly for long, hot or very sweaty sessions. Water suits shorter efforts.
What are the signs I’m low on electrolytes?
Cramping, headaches, fatigue and poor performance during long sweaty sessions can be signs — though these have many causes.
Can I make my own electrolyte drink?
Yes — water, a pinch of salt, some fruit juice and a little honey works well.
The bottom line
Electrolytes matter most for long, hot or sweaty training. Use a product or a simple homemade mix for those sessions, and plain water for the rest.
This article is for general information and isn’t medical advice. If you have a health condition or take medication, check with a professional first.
