Electrolytes for Training: Who Actually Needs Them, and When

Electrolytes have gone from marathon-aid-station niche to every influencer's morning ritual. Somewhere between "only ultrarunners need them" and "salt your water hourly" sits the truth. Here it is, without the hype in either direction.

What electrolytes actually do

Electrolytes — mainly sodium, with potassium and magnesium in support — are the charged minerals your body uses to move fluid where it's needed, fire nerves, and contract muscle. Every rep you lift and every drop you sweat runs on them.

Sweat is the key word. Sweat isn't just water — it carries sodium out with it, at rates that vary hugely between people. Some athletes finish a session crusted white with salt; others barely lose any. That variation is why the "does everyone need electrolytes?" question has no single answer.

Who genuinely benefits

Heavy sweaters. If your shirt is soaked and salt-stained after sessions, you're losing meaningful sodium and plain water alone won't fully restore the balance.

Long or double sessions. Past roughly the hour mark of hard work — or with a second session coming — replacement starts mattering.

Training in the heat. An Adelaide summer session multiplies sweat losses. This is the classic use case.

Low-carb or fasted trainers. Lower-carb eating shifts sodium balance, and many people training this way feel noticeably better with deliberate electrolyte intake.

The chronically flat. Headaches, lightheadedness or unusual fatigue around big sessions, despite drinking plenty of water, is sometimes a sodium story — plain water without minerals can dilute you further.

The ratio problem almost nobody talks about

Here's the twist in the electrolyte story: most people already eat too much sodium — and not enough potassium or magnesium.

Typical modern diets, built on processed and packaged food, run well over the recommended sodium intake while falling chronically short on the other two. So the minerals doing the quiet work — potassium for muscle function and fluid balance, magnesium for contraction and cramp resistance — are exactly the ones most diets under-deliver.

Which reframes what a good electrolyte formula is actually for. For a lot of people, the benefit isn't "more salt" — it's restoring the ratio: meaningful potassium and magnesium alongside sensible sodium, correcting an imbalance the modern diet creates daily. This is why formulas that are basically flavoured table salt miss the point, and why the mineral ratios on the label matter as much as the totals.

(Training hard in the heat is the exception where sodium replacement genuinely leads — sweat is sodium-heavy, and that's what the list above is about.)

Who probably doesn't need a supplement

A 45-minute lifting session in an air-conditioned gym loses modest sweat — food easily covers the sodium side of that. Whether your diet covers the potassium and magnesium side is the ratio question above, and for many people the honest answer is no. But if your diet is genuinely rich in fruit, veg and whole foods and your training is light, you're covered — we'd rather tell you that than sell you a tub you don't need.

The cramp question, honestly

"Electrolytes stop cramps" is the category's favourite promise, and the science is messier than the marketing. Cramp research points at muscle fatigue and conditioning as major drivers, with hydration and sodium status playing a contributing role for some people — especially heavy sweaters in heat.

Fair translation: if you cramp in long, hot, sweaty sessions, electrolytes are a sensible, low-cost thing to trial. If you cramp in bed at 2am, the answer is more likely training load, and no drink fixes that.

How to use them

Before/during: One serve in your session water for long, hot or hard days. Sip through the work rather than skulling at the end.

After: With your post-session fluids — pairs naturally with a light recovery drink like protein water on hot days.

Taste rule: If it tastes amazing mid-session, you probably needed it. If it tastes like the ocean, you probably didn't — your salt appetite is a surprisingly decent guide.

Our Electrolytes follow the house standard: every mineral individually dosed on the label, no "hydration matrix" mysteries, mixed and packed in Australia with third-party results published.

FAQ

Are sports drinks the same thing? Mostly they're sugar drinks with a sprinkle of sodium. Fine as fuel for endurance work; inefficient as electrolyte replacement. A dedicated electrolyte mix gives you the minerals without 15 teaspoons of sugar riding along.

Can you take too many electrolytes? Sodium is the one to watch — most people's diets already run high on it, which is exactly why the potassium and magnesium side of a formula matters. Match sodium intake to sweat rather than stacking it by habit, and if you're managing blood pressure or kidney issues, talk to your doctor first.

Do electrolytes break a fast? Plain electrolyte minerals are essentially calorie-free, which is why fasted trainers are among their heaviest users. Check the label for added sugars if that matters to you — ours states everything.

Water or electrolytes for a normal gym day? Water. Save the electrolytes for the days that earn them — long, hot, sweaty, or doubled.

Premium Supps — Australian-made, fully disclosed doses, independently tested. General information, not medical advice.