How Pro Athletes Choose Their Hydration: What Olympians and Ultramarathoners Actually Drink
The hydration strategies of elite athletes reveal a revolution in sports science. From Kipchoge’s precision hydrogels to NFL sideline pickle juice, here’s what the world’s best endurance and power athletes actually drink—and what you can steal from their playbooks.
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What Happens Behind the Scenes: Pro Hydration Isn’t Casual
When Eliud Kipchoge runs a marathon, he’s not grabbing whatever sports drink sits at the aid stations. When an NFL player jogs to the sideline on a sweltering September day, the team doesn’t just hand him a generic Gatorade. When a tennis pro sits during a changeover, there’s a calculated strategy behind every sip.
Professional athletes treat hydration the way a Formula 1 pit crew treats fuel: it’s engineered, tested, personalized, and obsessed over. What they drink isn’t accident. It’s science backed by millions in research, fine-tuned to individual physiology, and often the difference between a podium finish and a collapse at mile 20.
The shift happened gradually, then suddenly. For decades, sports hydration was simple: drink water. Then sports drinks. Then it became obvious that water and electrolytes alone weren’t cutting it. Now, elite athletes are accessing personalized hydration strategies that would have seemed like science fiction a decade ago—and those strategies are trickling down to the rest of us.
This is what the world’s best endurance and power athletes actually drink, and why it matters whether you’re chasing a marathon finish, playing competitive tennis, or just trying to survive a brutal CrossFit workout.
The Evolution of Sports Hydration: From Water Stations to Custom Electrolyte Formulas
The history of sports hydration is the history of athletes and scientists realizing, one painful lesson at a time, that simple hydration isn’t simple at all.
For most of sports history, the answer to “what should I drink during exercise?” was: water. Athletes would hit water stations, drink as much as they could stomach, and hope it was enough. The problem was immediately obvious: water alone doesn’t replace the electrolytes lost in sweat. Sodium, potassium, and magnesium all vanish with each drop of perspiration, and their absence causes cramps, fatigue, and impaired performance.
The 1960s brought the first modern sports drinks—formulas designed to replace both fluid and carbohydrates. This was genuine progress, but early versions were often too sweet, too thick, and hard on the gut. Athletes would report nausea, bloating, and that sloshing feeling that can ruin a race.
What changed the game wasn’t a single innovation—it was the realization that hydration isn’t one-size-fits-all. Individuals sweat at wildly different rates and with vastly different sodium concentrations. A runner who loses 500mg of sodium per liter of sweat will perform catastrophically differently on the same sports drink as an athlete who loses 2,000mg per liter. One will feel great; the other will cramp or, worse, develop hyponatremia from drinking too much plain water.
This is where sweat testing entered the pro playbook. Companies like LEVELEN now offer athletes the chance to measure their exact sweat rate and sodium loss. Major leagues—the NFL, NBA, MLB, NHL, and the Premier League—now sweat test entire rosters to dial in individual hydration formulas. A single test costs what a decent pair of running shoes costs. For a pro athlete, it’s a no-brainer investment.
The result is hydration strategies that are as personalized as a custom race bib. And the athletes who nail this—who know exactly how much fluid they lose per hour and exactly how much sodium they need to maintain performance—are the ones standing on the podium.
Marathon & Distance Running: Precision Engineering at 26.2 Miles
No sport has invested more heavily in hydration science than elite distance running. The stakes are clear: lose the hydration game and your body simply stops working in the final miles.
The Kipchoge Blueprint: Maurten and the Hydrogel Revolution
Eliud Kipchoge has run marathons in ways most humans can’t comprehend: he set the world record at the 2018 Berlin Marathon, then became the first human to run a marathon under two hours in 2019. Both efforts relied on a hydration strategy that wasn’t available to most runners just a few years ago.
Maurten, the Swedish sports nutrition company, engineered drinks specifically for elite distance runners using hydrogel technology. The basic idea: when a traditional sports drink hits the stomach’s acids, it stays there too long, creating that sloshing, heavy feeling that slows athletes down. Maurten’s hydrogel forms a protective barrier that guides carbohydrates to the intestines faster, reducing gastric transit time from 48-51 minutes to just 21 minutes.
The practical result? Before using Maurten, Kipchoge could absorb around 37 grams of carbohydrate per hour. With Maurten, he pushed that to over 100 grams per hour. That’s an extra 200+ calories per hour—energy that other runners simply can’t access.
Kipchoge’s hydration strategy during the INEOS 1.59 Challenge wasn’t just a sports drink choice. It was the result of months of testing, adjustments, and preparation. His support team knew his exact sweat rate, his sodium needs, his gut capacity, and the precise timing of every drink during the race.
The lesson for distance runners: precision matters. Professional athletes don’t guess at hydration—they test it. They run sweat tests, identify their individual sodium losses, and practice race-day nutrition repeatedly before race day.
Training vs. Race-Day Hydration
Pro marathoners make a critical distinction between training hydration and race-day hydration. During training, the goal is different. You’re teaching your gut to accept fluid and carbohydrates under stress, but you’re also training your body to run efficiently. Race day is when you unlock the aggressive hydration strategy—the high sodium, high carbohydrate approach that your months of testing have validated.
Elite distance runners also obsess over sodium. The sodium-potassium balance affects muscle function, cramp resistance, and cognitive performance. Studies show that runners who practice sodium loading—increasing sodium intake in the days before the race—arrive at the starting line with better electrolyte retention. Add a personalized electrolyte drink during the race (specific to individual sweat sodium loss) and you’ve created a system that maintains performance in the final miles when other athletes are falling apart.
NFL & Football: Sideline Hydration and the Pickle Juice Phenomenon
If distance running is about precision, NFL hydration is about power, heat, and desperation. And it’s evolved from simple water bottles to a sophisticated system that includes one of the most unlikely performance enhancers in sports: pickle juice.
The Legendary Pickle Juice Game
On September 3, 2000, the Philadelphia Eagles faced the Dallas Cowboys in a game that would become legendary—not for touchdowns or defensive plays, but for cramp prevention.
The conditions were brutal: outdoor temperature hit 109 degrees with field temperature reaching 130 degrees. Dallas lost a dozen players to heat cramps. Philadelphia lost none.
The Eagles demolished Dallas 41-14. Running back Duce Staley rushed for 201 yards. Dallas managed just 167 yards of total offense. The victory was so dominant that the game became known as the “Pickle Juice Game,” and it marked the beginning of pickle juice’s mainstream acceptance in professional sports.
What was happening? Research by Brigham Young University showed that pickle juice stopped muscle cramps in about 85 seconds, relieving cramps 45% faster than drinking no fluids and 37% faster than water alone. The acetic acid in pickle juice appears to trigger a neurological response that halts cramps almost instantly.
Now, pickle juice has become standard on NFL sidelines. Brands like Fast Pickle are designed specifically for athletes who want the cramp relief without the pickles. You’ll find it in NFL locker rooms, on sidelines during the sweltering early-season games, and increasingly in the training regimens of athletes across multiple sports.
Modern NFL Hydration Protocol
Today’s NFL teams combine multiple hydration strategies. They have customized hydration plans based on sweat testing. They monitor players’ weight loss (if you lose more than 2% of body weight to dehydration, performance drops measurably). They use IV drips in the hours before games to maximize pre-game hydration. They keep high-sodium pickle juice products on the sideline as a cramp-relief emergency brake.
The sodium loading that works for marathoners also applies in football. Players load sodium in the days before big games to increase plasma volume and heat tolerance. Game-day hydration includes high-sodium electrolyte drinks—much higher sodium than civilian sports drinks—because football players lose 1-2 liters of sweat per hour in full pads.
Tennis: Hydration During Changeovers and Heat Management
Tennis presents a unique hydration challenge. Unlike running, where you can drink continuously, tennis players only get opportunities during 90-second changeovers. The heat is relentless. The stakes are individual—one player’s mistake is one player’s loss.
The Changeover Strategy
Professional tennis players use changeover hydration strategically, drinking more than 200ml of fluid during each 90-second break in mild temperatures. But it’s not just water. Pro players alternate between water for simple hydration and sports drinks for carbohydrate replacement and sodium restoration.
The best players have years of experience knowing exactly what their body can handle. Novak Djokovic, for example, consumes dates on changeovers, explaining that dates provide fast energy without the blood sugar crash that comes from simple sugar. Rafael Nadal and other top players typically alternate between water and sports drinks during changeovers.
The cramp issue is real. Tennis matches can last 4-6 hours in scorching conditions. Sodium depletion and dehydration combine to cause cramping, which is why many pros eat bananas during matches for potassium and quick energy, and keep pickle juice solutions available for emergency cramp relief.
Heat and Hydration in Extended Matches
Tennis officials now monitor player hydration during extreme heat. Tournaments have medical timeouts specifically to allow players to hydrate and cool down. The hydration strategy evolves as the match progresses and electrolyte depletion accumulates.
Pro tennis players also understand the performance impact of dehydration. Dehydration impairs decision-making, slows reaction time, and increases cramping risk. In a sport where a single poor decision in a tiebreak can cost you $1 million, hydration is literally a performance lever.
CrossFit & Functional Fitness: High Sodium, High Intensity, Rapid Recovery
CrossFit athletes operate at the intersection of strength, power, and endurance. Their hydration strategy reflects that intensity.
The LMNT Approach: High Sodium for High Intensity
LMNT electrolyte powder has become ubiquitous in the CrossFit community, and for good reason. LMNT delivers 1,000 milligrams of sodium per packet—roughly three times the sodium in conventional sports drinks.
Why? CrossFit athletes lose staggering amounts of sodium through sweat. A typical CrossFit WOD might generate 1-1.5 liters of sweat in an hour, with athletes losing anywhere from 400-600mg to 2,300mg of sodium per liter. For a 90-minute competition or heavy training session, that’s 800-2,000mg of sodium lost. LMNT’s formulation—1,000mg sodium plus 200mg potassium and 60mg magnesium—is designed to replenish that loss in real time.
The result? Better strength retention, improved power output, and faster recovery between rounds. CrossFit, MMA, and strength athletes rely on LMNT’s high sodium content to maintain strength, power, and focus during intense sessions.
Pickle Juice and WODs
Just like in NFL training, CrossFit athletes use pickle juice for cramp prevention and recovery. After a brutal WOD, a shot of pickle juice can prevent the delayed-onset cramping that hits hours later. Some athletes use it strategically during training—a small dose before or during a heavy EMOMs (every minute on the minute) workout to prevent cramping during the session.
The high-sodium emphasis in CrossFit also means post-workout hydration is different from other sports. Recovery drinks emphasize electrolyte replacement over carbohydrate replacement, because the damage is more about electrolyte depletion than glycogen depletion.
Ultramarathon & Extreme Endurance: The Hyponatremia Problem
Ultramarathoners face a hydration paradox: they need to drink enough to survive, but drinking too much can kill them.
The Hyponatremia Risk
Exercise-associated hyponatremia (EAH) is a real, dangerous condition where blood sodium becomes dangerously low from drinking too much fluid without adequate sodium replacement. Research published in the New England Journal of Medicine showed that a significant percentage of marathon finishers have low blood sodium levels, and some experience serious complications including seizures and cerebral edema.
The problem: ultramarathoners can run for 20+ hours. Aid stations often emphasize hydration without emphasizing sodium. A runner drinking 1-2 liters per hour for 20 hours without adequate sodium creates a dangerous electrolyte imbalance.
The primary cause of EAH is drinking too much fluid during exercise combined with an inability to eliminate excess water to keep blood-sodium levels normal. Interestingly, drinking fluids only when thirsty will prevent virtually all cases of EAH.
The Ultramarathoner’s Hydration Strategy
Elite ultramarathoners approach hydration with military precision. They know their sweat rate. They know their sodium loss. They use custom electrolyte formulas with aggressive sodium levels—often 500-1,000mg per bottle. They practice salt tablet strategies during training to know exactly how much sodium their gut can handle. They often combine sports drinks with pickle juice or salt capsules to maintain the electrolyte balance needed for 20+ hour efforts.
The common approach: drink to thirst plus a safety margin, but make sure every liter of fluid includes 500-1,000mg of sodium. This maintains the fluid-sodium balance that prevents hyponatremia while providing adequate hydration.
Skratch Labs has become popular in ultramarathon communities for this reason—their formulation includes more sodium than typical sports drinks while avoiding the excessive sweetness that causes GI distress in extended efforts.
Cycling & Triathlon: On-Bike Nutrition and the Skratch Labs Origin Story
Modern cycling hydration strategy was literally born from pro cyclists complaining about traditional sports drinks.
The Skratch Labs Story
Allen Lim was a sport scientist and coach for the Slipstream cycling team competing in the Tour de France. His job was to ensure proper training, food, and hydration for 25 elite cyclists. The problem: the cyclists were getting sick from the sports drinks available on the market. They were too sweet, too artificial, too hard on the gut.
Lim started making his own drink mix from scratch. His formula included 700-800mg of sodium (about 2-3 times the sodium in conventional sports drinks) and 40 grams of carbohydrate per liter—roughly half to a quarter less sugar than conventional sports drinks. The game-changer was using real fruit for flavor instead of artificial ingredients.
The cyclists loved it. It worked. They didn’t get sick. Lim and fellow cyclist Ian MacGregor decided to turn that proven formula into Skratch Labs, launching from Boulder, Colorado.
The lesson? Pro athletes will abandon any product that doesn’t work. Skratch Labs succeeded because it was proven in the hardest endurance event in the world—the Tour de France—with cyclists who literally depend on their equipment and nutrition working flawlessly.
On-Bike Hydration for Long-Distance Triathlon
Ironman and other long-distance triathletes face a unique challenge: managing nutrition across a 2.4-mile swim, 112-mile bike, and 26.2-mile run. The bike leg is where most of the calories go in.
Elite triathlon athletes aim for 60-120 grams of carbohydrate per hour during Ironman events, with elite athletes successfully consuming over 100g per hour. On the bike, most athletes need about 500ml fluid hourly with at least 250mg sodium to maintain hydration.
The strategy: aggressively fuel on the bike to bank calories, then scale back on the run when heat stress makes aggressive fueling impossible. Athletes look to consume 90g carbs per hour on the bike, then 60g/hr on the run for hotter conditions.
Sweat testing applies here too. Pro triathlon teams often sweat test their athletes to dial in sodium replacement during the bike leg, because sodium management affects both hydration and cramp prevention during the run.
What All Pro Athletes Agree On: The Universal Truths of Elite Hydration
Despite the sport-by-sport variation, pro athletes agree on several principles:
1. Sodium Is More Important Than Most People Think
Every elite athlete we’ve covered—from marathoners to tennis pros to ultramarathoners—emphasizes sodium. This is the biggest shift from civilian sports drink culture. Most people assume sports drinks have enough sodium. They don’t. Pro athletes load sodium in training, use high-sodium drinks during events, and often carry high-sodium pickle juice products or salt capsules specifically for sodium replacement and cramp prevention.
2. Personalization Matters More Than Brand Loyalty
A marathoner with high sweat sodium loss will perform differently on the same drink as an athlete with low sodium loss. Professional teams sweat test their athletes to dial in individual hydration formulas. This isn’t theoretical—it’s the difference between feeling great in the final miles and falling apart.
3. Simple Ingredients Beat Complex Formulas
From Skratch Labs to Maurten, pro-level sports drinks tend toward simplicity: carbohydrates, sodium, potassium, water, and real fruit flavor. The fancy stuff—BCAAs, extra vitamins, mysterious proprietary blends—gets left behind. Pro athletes don’t want mystery; they want performance.
4. Having a Cramp-Relief Backup Is Standard Practice Now
Pro athletes across multiple sports now treat Fast Pickle or similar cramp-relief solutions as essential equipment. It’s not a gimmick. It’s backed by research and proven in the highest-stakes competitions on Earth.
What Amateur Athletes Can Learn From the Pros
You don’t need to be a professional to apply these principles:
Test Your Hydration Strategy. Don’t guess. In training, experiment with different drink formulations, sodium levels, and hydration timing. Note what makes you feel strong and what causes GI distress. Race day is not the time to experiment.
Dial In Sodium, Not Just Carbs. Most civilian athletes under-salt their hydration strategy. Try increasing sodium in training—especially for efforts over 90 minutes. You’ll likely notice better performance and reduced cramping.
Practice Cramp Prevention. Whether you use pickle juice products, salt tablets, or aggressive sodium in your sports drink, have a backup plan for cramps. Don’t assume it won’t happen to you.
Consider Sweat Testing If You’re Serious. If you’re training for a goal race, services like Precision Hydration offer sweat testing to identify your individual sodium loss. It costs less than a pair of running shoes and might be the difference between success and DNF.
Keep It Simple. You don’t need a cabinet full of exotic supplements. You need water, electrolytes (especially sodium), and carbohydrates. The best hydration strategy is the one you’ll actually follow.
Practice on-race-day nutrition in training. If you plan to use Maurten hydrogel drinks, LMNT electrolytes, or Skratch Labs during your event, train with them repeatedly beforehand. Gut adaptation is real.
Product Recommendations by Sport Type
| Sport | Primary Hydration | Sodium Strategy | Cramp Prevention |
|---|---|---|---|
| Marathon & Distance Running | Maurten hydrogel drinks | Personalized electrolyte formula (sweat test) | High-sodium pickle juice products, salt tablets |
| NFL & Team Sports | Team-specific high-sodium drinks | 1,000mg+ sodium per hour | Pickle juice products on sidelines |
| Tennis | Water + sport drink alternating | 250-500mg per changeover | Pickle juice products, bananas |
| CrossFit | LMNT electrolytes | 1,000mg sodium per serving | Pickle juice products post-workout |
| Ultramarathon | Skratch Labs, custom formulas | 500-1,000mg per bottle | Pickle juice products, salt capsules |
| Cycling/Triathlon | Skratch Labs, Maurten | 700-800mg per liter | Pickle juice products, salt tablets |
The Verdict: Pro Hydration Isn’t Magic—It’s Meticulous
What Pro Athletes Teach Us About Hydration
Pro athletes don’t rely on guessing. They test. They personalize. They practice. They measure sodium loss, dial in carbohydrate timing, and have backup plans for everything from cramps to heat stress.
The brands they trust—Maurten, LMNT, Skratch Labs, and increasingly Fast Pickle—are chosen because they work when it matters. Not because of sponsorships or marketing, but because they deliver results in the hardest endurance and power events on Earth.
The common thread? Sodium. Every elite athlete, every sport, every context points back to the same conclusion: sodium is the overlooked electrolyte. It’s the difference between cramps and smooth final miles, between maintaining power and fading. If you take one lesson from pro athletes’ hydration practices, make it this: you probably need more sodium than you think.
Start with our guide to hydration for cramp prevention, dive deeper into how athletes use pickle juice, and understand the sodium-potassium electrolyte balance that separates pros from everyone else.
For serious endurance athletes: Invest in a sweat test. It’s the single most valuable piece of personalized data you can gather about your physiology. Knowing your individual sodium loss is worth more than most training advice you’ll get.
For everyone else: Sodium isn’t optional. If you’re exercising hard for longer than an hour, you’re losing sodium. Replace it, or prepare for the consequences.