Electrolytes for NHL Training Camp: What Two-A-Days on the Ice Actually Cost You

Electrolytes for NHL training camp aren't a nice-to-have — they're the difference between a strong third session and a body that's running on empty by day four. Camp is unlike anything else in the hockey calendar: two-a-day skates, off-ice conditioning, and a fitness testing gauntlet, all packed into a window where every rep is being watched. The cold rink makes it easy to assume you're not losing much. You are. You're just not feeling it the way you would on a hot field.

That gap — between what your body is actually losing and what your thirst is telling you — is the real story of training camp hydration. Here's what's actually happening under the gear, what the research says about it, and what to do differently this camp.

The Cold Rink Doesn't Mean Low Fluid Loss

This is the part most players get wrong. A 32–36°F sheet of ice reads as "cool," so it feels counterintuitive that you'd sweat like you're training outdoors in July. But you're not skating in the rink's air temperature — you're skating inside 15+ pounds of insulated gear that traps heat against your body the entire session.

Add full pads, a helmet, and a shell that doesn't breathe, and your core temperature climbs the same way it would in a hot gym. The rink is cold. You are not. That's the mismatch that catches so many players off guard during the first week of camp, when volume is highest and bodies haven't adapted yet.

What the Research Actually Shows

A study on elite Canadian junior hockey players measured sweat rate during a single on-ice practice at roughly 1.8 liters per hour. Players only replaced about 58% of that — call it a liter an hour — leaving a real deficit by the final whistle. On average, body mass loss came in around 0.8%, but a third of players lost more than 1%, which is enough to start affecting reaction time and decision-making late in a session.

The sodium side is where it gets more specific. Sweat sodium concentration averaged 54.2 mmol per liter, adding up to roughly 2.26 grams of sodium lost during a single practice. In that same study, players were drinking only water — meaning they were replacing volume without replacing any of the sodium they'd just lost. Over half of the group even started practice already mildly dehydrated, before a single lap.

Stack two-a-days on top of that pattern for a week straight, and you can see how camp turns into a slow accumulation of deficit rather than one bad session.

Why Water Alone Falls Short During Camp

Plain water rehydrates volume. It does nothing for the sodium, potassium, and magnesium you're also losing through sweat — the electrolytes your muscles and nervous system actually run on. Drink enough plain water without replacing those minerals and you can end up diluting what's left in your system, which is part of why some players feel "hydrated" on paper but still cramp, get foggy, or feel flat by their third rep of the day.

During a normal week, that's an inconvenience. During camp — when coaches are grading every drill and roster spots are on the line — it's the difference between showing your best hockey and showing tired legs.

A Simple Hydration Approach for Camp Week

You don't need a lab coat to fix this. A few habits, applied consistently across camp, cover most of what the research points to:

Before the first skate: don't show up already behind. Get ahead of fluids and electrolytes the night before and the morning of, rather than trying to chug water in the locker room ten minutes before puck drop.

Between sessions: this is the window most players waste. The gap between the morning skate and the afternoon session is exactly when sodium and fluid should be going back in — not just water, and not just whatever's in the vending machine.

After the last whistle: recovery starts with what you drink in the first 30 minutes off the ice, not what you eat three hours later at dinner.

Where Adapt SuperWater Fits In

This is exactly the gap Adapt SuperWater was built to close. It's a clean electrolyte formula — sodium, potassium, and magnesium in ratios built for real fluid loss, not just a splash of flavor — with no artificial sweeteners, no maltodextrin, and nothing that reads like a science experiment on the label. Mix a packet into your bottle between sessions and you're replacing what the ice actually takes, not just topping off water. For camp week specifically, that means one scoop after the morning skate and another after the last drill of the day, on top of your normal water intake.

Camp-Specific Situations Worth Planning For

Training camp has a few wrinkles that a regular week doesn't:

Fitness testing day. Bike tests and off-ice conditioning pieces are often scheduled back-to-back with an on-ice session. Front-load electrolytes the morning of — this is not the day to find out you're behind.

Goalies. More gear, less consistent movement to generate airflow, and often longer total ice time across a camp day. The sweat and sodium math above applies even more to netminders than it does to skaters.

Multi-rink facilities. Bigger camps often rotate groups across two or three sheets of ice with minimal downtime in between. If your only hydration plan is "whatever's at the water fountain," you'll fall behind by session two.

Frequently Asked Questions

How much fluid do hockey players actually lose during a practice?

Research on elite junior hockey players found sweat rates around 1.8 liters per hour during an on-ice practice, with many players replacing only about half to two-thirds of that through drinking.

Why do hockey players sweat so much in a cold rink?

Rink air temperature has little to do with it. Full gear traps heat against the body during high-intensity skating, so core temperature — and sweat rate — climbs the way it would in a warm gym, not a cold room.

Is water enough to stay hydrated during training camp?

Water replaces fluid volume, but it doesn't replace the sodium, potassium, and magnesium lost through sweat. Camp studies have found players drinking only water while losing over two grams of sodium in a single session — a gap water alone can't close.

When should players drink electrolytes during a two-a-day camp schedule?

The window between the morning and afternoon sessions matters most. That's when sodium and fluid should go back in, ahead of the next skate — not just immediately before puck drop.

Do electrolytes help with on-ice performance, or just recovery?

Both. Even mild fluid and sodium deficits have been linked to reduced reaction time and sharpness late in a session, which means proper electrolyte intake is as much a same-day performance factor as it is a recovery one.

Camp Week Starts With What's in Your Bottle

NHL training camp rewards the players who show up consistent, not just the ones who show up strong on day one. Hydration is one of the few variables you fully control, and the data is clear that plain water isn't the full answer. Get ahead of it, replace what the ice actually takes, and let your legs be the reason you make an impression this camp — not your fluid balance.

Ready to build your camp routine around it? Shop Adapt SuperWater's electrolyte formulas and check out more performance and recovery guides on the Adapt SuperWater blog.