Advanced hydration was one of the loudest categories in sports nutrition this year, and you have felt it. Electrolyte sticks at the checkout counter. Sodium counts on the side of every pouch. A confident voice online telling you that plain water is somehow making you worse. The category is growing fast, and like every fast-growing supplement category, the marketing has run well ahead of the evidence.
The useful truth sits in the middle. Electrolytes for training genuinely matter if you sweat heavily, train in heat, train for longer than an hour, or race. They matter much less if you are doing a 45-minute class in an air-conditioned room and eating normal food with salt in it. The difference between those two situations is not a brand. It is your sweat rate, your session length and your diet.
Here is how to work out where you actually sit, what sodium you need, and how our coaches approach hydration with members training across Vancouver, Port Coquitlam and the wider Lower Mainland.
What Electrolytes Do and Why Sodium Leads the List
Electrolytes are minerals that carry an electrical charge in your body fluids. Sodium, potassium, chloride, magnesium and calcium all sit in this group, and together they regulate fluid balance, nerve signalling and muscle contraction. When you sweat, you lose water and minerals together, with sodium lost in far greater quantity than anything else.
That is why sodium gets the attention. Potassium and magnesium losses in sweat are comparatively small and are usually replaced by food without much effort. Sodium is the one that runs down fastest, and the one that matters most for holding onto the fluid you drink. Drink large volumes of plain water during a long, sweaty effort and you dilute your blood sodium, which is the mechanism behind that sloshy, headachy, oddly flat feeling in the back half of a hard session.
The short version: hydration is not about total fluid volume. It is about fluid and sodium arriving together in a ratio your body can actually use.
Are You a Salty Sweater? A Simple Self-Test
Sweat sodium concentration varies enormously between people, roughly from 200 to over 2,000 milligrams per litre. That range is genetic and largely fixed, which means generic advice fails a lot of athletes in both directions.
You do not need a lab to get a workable answer.
- Check your gear. White crusty rings on a dark shirt or hat after training are the classic sign of high sweat sodium.
- Taste matters. If sweat running into your eyes stings noticeably or tastes sharply salty, you are likely on the higher end.
- Track your cramps. Cramping late in a session or a race, especially in muscles you did not work hard, often points to sodium loss rather than a lack of stretching.
- Run a sweat rate test. Weigh yourself naked before a one-hour session and again afterwards, accounting for any fluid you drank. Every kilogram lost is roughly a litre of sweat.
A member losing half a litre an hour in a Beatty Street class has a very different problem to one losing a litre and a half an hour during summer HYROX training. Our nutrition coaching starts here, with your numbers rather than someone else’s protocol.
How Much Sodium and Fluid You Actually Need
Sessions Under 60 Minutes
For most indoor functional fitness classes, water is fine. Arrive hydrated, sip as needed, and eat normally afterwards. If you salt your food and eat real meals, you are covering your losses. An electrolyte drink here is not harmful, but it is not doing much either.
Sessions of 60 to 120 Minutes, or Anything Hot and Sweaty
This is where electrolytes earn their keep. Aim for roughly 400 to 800 millilitres of fluid per hour, with somewhere between 300 and 700 milligrams of sodium per litre for moderate sweaters and up to 1,000 milligrams or more for heavy, salty sweaters. Adjust based on how you feel and how your performance holds up late in a session, not on what the label suggests.
Race Day and Long Training Blocks
Practise your hydration strategy in training. Race day is the worst possible time to discover that a particular drink upsets your stomach at high intensity. If you have a HYROX race or a long training day coming up, rehearse the exact products, volumes and timing in a session that mimics the effort.
Where Hydration Advice Goes Wrong
The two most common mistakes our coaches see are opposites, and both cost performance.
The first is chronic under-drinking followed by a panicked litre right before training. Fluid needs time to absorb. Drinking 500 millilitres in the ten minutes before a class mostly gives you a heavy stomach and a trip to the bathroom mid-workout. Spread your intake across the day and top up 60 to 90 minutes beforehand.
The second is treating electrolytes as a health supplement rather than a training tool. Sodium requirements scale with sweat losses. If you are sedentary on a rest day, a high-sodium drink is not doing anything useful for you, and anyone managing blood pressure should be talking to their doctor rather than following a hydration influencer.
There is also a quieter problem: using electrolyte drinks to paper over poor fuelling. If you are fading 40 minutes into a session, sodium may be part of it, but so might be eating nothing since breakfast. Hydration works alongside carbohydrate and protein intake, not instead of it.
Hydration for Training in the Lower Mainland
Our climate creates a specific pattern worth naming. Through the wet, cool months, Vancouver and Tri-Cities athletes tend to drink less, feel less thirsty, and still sweat heavily in a busy indoor class. Winter dehydration is real and it is easy to miss because nothing about the weather reminds you to drink.
Then summer arrives, gyms warm up, and sweat rates climb fast without much time to adapt. Athletes training through August in our Port Coquitlam studio can need close to double the fluid they needed in February for the identical session.
The practical move is to reassess your hydration twice a year rather than setting it once. Run a sweat rate test in the autumn and again in early summer, and adjust. It takes one session and it removes most of the guesswork.
Building Hydration Into a Real Nutrition Plan
Hydration is one variable among several, and it works best when the rest of the plan is solid. That means adequate protein spread through the day, carbohydrate timed around your hardest sessions, enough total energy to support your training load, and sleep that lets any of it matter.
Our nutrition coaching takes that whole picture rather than selling you a product. Members work with our coaches to establish sweat rate, set sodium targets for their actual sessions, and build the food habits that make supplementation a small finishing touch instead of a crutch. For anyone training for a race, that coaching runs alongside the programming in our HYROX classes so that fuelling and training are built to the same plan.
Get Your Hydration Dialled In
You do not need to overhaul your entire diet to feel better in training. For most people, fixing hydration is the fastest performance win available: cheap, quick to test and immediately noticeable in the back half of a hard session.
If you want a plan built around your numbers instead of a label, book a nutrition coaching consultation with our team. You can find us at 788 Beatty Street in Downtown Vancouver and 3162 to 585 Seaborne Avenue in Port Coquitlam, and our coaches have spent nearly 15 years helping athletes across BC turn small adjustments into better sessions. Start with a Foundations session or a free class, and let us help you get the basics right first.
