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Here’s how to hydrate for better performance.Here’s how to hydrate for better performance.Staying hydrated seems simple enough—drink water when you’re thirsty and stop when you feel like you’re done, right? Well, it’s a bit more complicated than that, especially for runners. 

That’s because not understanding the complicated equation of race distance and intensity combined with water and electrolyte intake can ruin a long run or race, not to mention have serious health repercussions. Drink too little and your ability to power through your workout suffers; drink too much and you can get sidelined by nausea and frequent pee breaks. 

And even though you might first worry about dehydration for those summer runs, researchers found that the newer you are to running and the slower you run, the more likely it is that you will drink too much water while racing. (We’ll talk more about this later.)

To that end, much of the research demonstrates that mastering the art of hydration when you run isn’t as simple as it seems. Keep reading to find out if you drink water the wrong way—and how to drink water right.

6 Ways You Drink Water Wrong and 6 Ways to Drink Water Right

❌ Wrong Way: Gulping water during a race

✅ Right Way: Sip as you run

It’s okay to slow a little to make sure you’re getting in your fluids during a race, but gulping water at each aid station can ultimately slow you down and also lead to an upset stomach.

That’s because drinking too much water too quickly overloads the stomach, causing it to rapidly stretch. This can lead to discomfort and potential nausea, Justin Mullner, M.D., a board-certified primary care sports physician with the Orlando Health Jewett Orthopedic Institute in Florida tells Runner’s World.

Take small sips of water (or electrolyte drink) every 15 to 20 minutes, depending on the temperature and intensity of the run.

Combining a run with too much water is even more likely to cause nausea. That’s because intense exercise directs blood flow away from the stomach and toward the muscles, causing digestion to slow down. “So you put a bunch of water in there and the stomach really can’t handle it effectively and efficiently,” Mullner says.

A better strategy is to take small sips of water (or electrolyte drink) every 15 to 20 minutes, depending on the temperature and intensity of the run. “This approach helps maintain a steady level of hydration and prevents the stomach from becoming overly full,” Meghan Kennihan, a RRCA- and USATF-certified running coach, tells Runner’s World.

❌ Wrong Way: Drinking from a dirty water bottle✅ Right Way: Regularly clean your bottle

Your trusty water bottle is always there when you need it. Sadly, constant use means you’re probably getting more than water. Unless you regularly clean your water bottle—which means daily according to Mullner—you could be getting a dose of bacteria or even mold.

Every time you put your mouth to the water bottle and use your hands to open and close it, you transfer bacteria that can make its way inside. The moist environment inside your water bottle provides an optimal breeding ground for bacteria and mold, especially if you live in hot, humid areas. If left unchecked, the bacteria and mold can continue growing, potentially causing you to experience symptoms similar to food poisoning (such as stomach pain or cramps, diarrhea, and vomiting), per the Centers for Disease Control and Prevention. People with mold sensitivities can have a flare-up of allergy symptoms.Ideally, you’d wash out your reusable bottle—whether plastic, stainless steel, or glass—with soap and warm water each time, Mullner says. “It’s even more important if you’re using the bottle every single day or drinking beverages other than water,” he says. Mixing electrolyte powders or adding a sports drink to your bottle, for example, means more material for bacteria.Signs your bottle could use a good scrubbing include visible residue, a funny or foul odor, or changes in how things taste, Mullner says.

❌ Wrong Way: Waiting too long to hydrate before a run or race✅ Right Way: Start early

When preparing for a long run or race, many runners forget to hydrate until they’re practically toeing the starting line, “which is a bad idea because it doesn’t give the body enough time to absorb and utilize the fluids,” Kennihan says.

Staying well-hydrated in the days leading up to your long run or race can help you perform well, avoid feeling overly full, and reduce restroom stops. Be especially diligent about drinking water starting the day before a long run or race, and check your urine color to be sure you’re getting enough. “Really dark yellow is a sign that you’re not well-hydrated,” Mullner says. “Ideally, it has a slight tinge of yellow.”

Drink 16 to 20 ounces of water about 2 to 3 hours beforehand and then another 8 to 10 ounces 20 to 30 minutes before running.

Individual fluid needs vary. However, a general guideline for the day of the event is to drink 16 to 20 ounces of water about 2 to 3 hours beforehand and then another 8 to 10 ounces 20 to 30 minutes before running, Kennihan says. You may need to adjust your intake according to your body size, run distance, and outside temperature.

❌ Wrong Way: Drinking too much water on long runs✅ Right Way: Balance electrolyte intake with water

It’s critical to drink enough water during long training runs and races. However, drinking lots of water, and only water, can lead to overhydration, meaning you have too much water in your body.

Hyponatremia is an extreme version of overhydration, and occurs when sodium levels in the blood are lower than recommended, leading to muscle cramps, headaches, nausea and vomiting, low energy, and confusion, per the Cleveland Clinic. Normally, your body keeps your electrolytes in balance by taking the minerals from the foods you eat and filtering the excess through your urine. However, intense exercise causes electrolytes (particularly sodium) to be quickly lost through sweat, and hot, humid temperatures only accelerate this loss, per the American College of Sports Medicine. 

It's not just new runners who tend to overhydrate. At the other end of the spectrum, 41 out of 63 finishers at an ultramarathon also finished with mild or severe hyponatremia, according to a 2019 Frontiers in Nutrition study.

Take in electrolytes in addition to water if you’re running for longer than 60 minutes or in hot, humid temperatures. Drinking water without replacing electrolytes dilutes the remaining electrolytes (again, sodium in particular) in your blood. “You can potentially get yourself into trouble with hyponatremia,” Mullner says.

To prevent an electrolyte imbalance, take in electrolytes in addition to water if you’re running for longer than 60 minutes or in hot, humid temperatures. Bring an electrolyte drink, some gels, or another electrolyte supplement.

❌ Wrong Way: Drinking a pure sports drink✅ Right Way: Water it down

Sports drinks offer a convenient delivery system for carbs and electrolytes while running. Still, many runners prefer to water things down.

“Many sports drinks are too concentrated, leading to stomach cramps and nausea. Diluting them can still provide the necessary electrolytes and carbohydrates without overwhelming the stomach,” Kennihan notes.

The optimal ratio of sports drink to water depends on your preferences and the makeup of your drink. Mullner suggests diluting your sports drink to the point where it’s most palatable for you.

Diluting sports drinks can still provide the necessary electrolytes and carbohydrates without overwhelming the stomach.

The exception: Don’t dilute a sports drink that contains carbohydrates if you’re using it for energy purposes. “Some sports drinks have carbs in there to help extend the amount of time you can perform, and if you’re trying to absorb carbs better, you would have it with some electrolytes,” Mullner says. Adding water can cut down on how many carbs you get per sip, limiting performance benefits.❌ Wrong Way: You don‘t know about your med’s side effects

✅ Right Way: You read labels and talk to your pharmacist

Some over-the-counter and prescription medications can affect an athlete’s hydration, says Kennihan. NSAIDs, such as ibuprofen and aspirin, can reduce blood flow to the kidneys, which can impair their ability to conserve water and electrolytes, potentially leading to dehydration, especially during prolonged physical activity like running. 

Similarly, diuretics, which are prescribed for conditions such as hypertension and edema, increase urine production and promote the excretion of water and electrolytes from the body. Increased urine output can lead to a significant loss of fluids and electrolytes, making it easier for runners to become dehydrated, particularly in hot and humid conditions or during long-distance runs. 

Likewise, antihistamines can reduce saliva production and increase the risk of dry mouth and dehydration, while laxatives can cause increased bowel movements and fluid loss.Lastly, stimulant medications, such as those used for attention deficit hyperactivity disorder (ADHD), can increase sweating and fluid loss, potentially leading to dehydration if fluid intake is not adequately maintained.

Bottom line: As a runner, remember that hydration is as much a part of your performance as actual time on your feet. 

The authors of a 2019 article published in the International Journal of Sport Nutrition and Exercise Metabolism recommended that runners develop a “personalized and practiced race plan” to optimize their fluid and carbohydrate intake based not only on their distance and intensity, but also taking into account their body composition, as well as the weather and other race conditions, such as refueling stations, at each event.

Ethiopia’s Fotyеn Tesfay Haylu delivered one of the most remarkable women’s half-marathon performances ever seen on American soil on Sunday, powering to a commanding victory at the 2026 Buenos Aires Half Marathon in Argentina in 1:03:57.

Running with exceptional confidence and strength, Tesfay took control of the race and produced a superb solo performance to rewrite the event record. Her breathtaking run also carried historic significance, as she became the first woman to break the 64-minute barrier for the half marathon in the Americas, producing what is being celebrated as the fastest women’s half-marathon performance ever recorded on the continent.

The Ethiopian star was in a class of her own, crossing the finish line more than a minute clear of Turkey’s Nevin Can, who finished second in 1:05:06. Another Turkish athlete, Selin Can, completed the podium in third place with 1:05:11, as the leading trio all produced strong performances on the fast streets of Buenos Aires.

Kenya also featured prominently in the top positions, with Irene Jepchumba Kimais taking fourth in 1:06:04, followed by Sheila Chepkirui in fifth with 1:06:13. Magaret Akidor Ngathike finished sixth in 1:06:46, while fellow Kenyan Deborah Samum claimed seventh place in 1:08:32.

Brazil’s Nubia de Oliveira Silva was eighth in 1:11:13, while Argentina’s Sofia Luna and Dahyana Juarez rounded out the top 10 with times of 1:11:21 and 1:11:28, respectively.

Top 10 Women – 2026 Buenos Aires Half Marathon

1. Fotyеn Tesfay Haylu (Ethiopia) – 1:03:57

2. Nevin Can (Turkey) – 1:05:06

3. Selin Can (Turkey) – 1:05:11

4. Irene Jepchumba Kimais (Kenya) – 1:06:04

5. Sheila Chepkirui (Kenya) – 1:06:13

6. Magaret Akidor Ngathike (Kenya) – 1:06:46

7. Deborah Samum (Kenya) – 1:08:32

8. Nubia de Oliveira Silva (Brazil) – 1:11:13

9. Sofia Luna (Argentina) – 1:11:21

10. Dahyana Juarez (Argentina) – 1:11:28

For Tesfay, it was far more than a race victory. Her 1:03:57 performance was a statement of extraordinary quality, combining speed, endurance and remarkable solo running to produce a landmark result in Buenos Aires. In a race that will be remembered for years to come, the Ethiopian did not simply win—she redefined what was thought possible for women’s half-marathon running in the Americas.

Ethiopia’s Yomif Kejelcha produced one of the most extraordinary performances in road racing history on the streets of Buenos Aires, Argentina, reclaiming the half marathon world record with a sensational 56:51 performance at the 2026 Buenos Aires Half Marathon.

The former world record-holder delivered a breathtaking exhibition of speed and endurance to take 29 seconds off the previous pending mark of 57:20, set by Uganda’s Jacob Kiplimo and takes a huge chunk from his own former official world record. Kejelcha's new performance is pending the standard ratification procedures, but if officially ratified, it will return the world record to the Ethiopian star and mark another remarkable chapter in the evolution of the event. 

Kejelcha's achievement is particularly significant because the 57-minute barrier had already been broken before. Jacob Kiplimo had previously run under 57 minutes, clocking 56:42 that was not ratified demonstrating that the once-unthinkable barrier was possible. Kejelcha, however, has become the second man to run under 57-minute barrier who now returns to the top of the all-time rankings with another historic performance in Buenos Aires.

The Ethiopian's race was remarkable not only for the final time but also for the way he built his performance. He covered the opening five kilometres in 13:44 before reaching 10km in 27:18. Rather than slowing, Kejelcha accelerated through the middle stages, passing 15km in 40:39 and 20km in 54:02 as he continued to push the limits of elite road racing.

By the time he reached the finish line, Kejelcha had completed the race at an extraordinary average pace of approximately 2:42 per kilometre, producing one of the most astonishing sustained efforts ever witnessed in distance running. His stunning run sent a powerful message to the athletics world and further strengthened his status as one of the most formidable distance runners of his generation.

Behind the record-breaking champion, Ethiopia completed a dominant clean sweep of the men's podium. Tadese Worku Gebresilase claimed second place in 59:18, while Bereket Nega Batebo secured third in 1:00:17, giving Ethiopia a memorable one-two-three finish in the Argentine capital.

Kenya’s Jonathan Kipkoech Kamosong finished fourth in 1:00:20, followed by compatriot Simon Maywa in fifth with 1:00:55. Argentina’s Ignacio Erario gave the home supporters plenty to celebrate with an impressive sixth-place finish in 1:00:57, breaking the one-hour barrier in front of an enthusiastic local crowd.

Dillon Kipyeko of Kenya finished seventh in 1:01:07, with Robert Kiprop Koech eighth in 1:02:01. Mexico’s Julio Ortiz Ponce took ninth place in 1:03:17, while Colombia’s Jimmy Gómez completed the top 10 in 1:03:34.

The Buenos Aires Half Marathon will now take its place in the history books as the scene of a truly extraordinary breakthrough. For Kejelcha, this was more than just another victory. It was a spectacular return to the top, reclaiming a world record he had previously held and once again rewriting the limits of the half marathon.

The 56:51 performance remains pending ratification, but Yomif Kejelcha's run has already delivered one of the defining moments in the history of road racing.

Kenya delivered another commanding display of distance-running excellence at the Antrim Coast Half Marathon, with Isaia Lasoi leading a memorable Kenyan clean sweep of the men's podium in a race packed with world-class performances.

Lasoi emerged victorious after a thrilling battle at the front, crossing the finish line in a superb 58:26 setting a new course record. His winning performance underlined his strength and speed over the half-marathon distance, but he was made to work all the way by fellow Kenyan Daniel Mateiko, who finished just three seconds behind in 58:29 after an electrifying duel for the title.

The contest between the two leaders produced one of the standout moments of the race, with both athletes pushing deep into elite territory as they fought for victory. In the end, Lasoi found just enough to secure the win, while Mateiko's narrow defeat highlighted the remarkable depth and quality of Kenya's leading distance runners.

Vincent Kipkorir completed the Kenyan sweep, taking third place in 1:00:38 to ensure that all three places on the podium belonged to Kenyan athletes. Samwel Chebolei added further Kenyan strength to the results, finishing fourth in 1:01:01, while Amos Langat was also among the leading finishers.

The international field featured several prominent names. Australia's Jimmy Whelan produced a strong run, while Ethiopia's Yismaw Dillu featured among the front group. American marathon star Galen Rupp also delivered a notable performance, clocking 1:01:29 in another competitive outing for the experienced distance runner. Former world-class track and road athlete Edward Cheserek was also among the top finishers.

Lasoi's 58:26 victory, however, was the defining performance of the day. Together with Mateiko and Kipkorir, he gave Kenya a perfect podium and another emphatic reminder of the country's extraordinary strength in elite road running.

The Antrim Coast Half Marathon once again provided a fast, competitive stage for some of the world's finest distance runners, but when the decisive moments arrived, it was Kenya that owned the podium.

One of the most iconic milestones in the history of ultramarathon running is drawing closer, with entries for the historic 100th edition of the Comrades Marathon set to open on Tuesday, 25 August 2026.

The Comrades Marathon Association has officially announced a detailed entry process for the 2027 race, which will unfold in three stages and give runners around the world the opportunity to secure their place in what promises to be one of the most significant editions ever held of The Ultimate Human Race.

The announcement followed the official launch of the 2027 Comrades Marathon on Wednesday, 19 August, when the centenary campaign, “The Greatest Story Ever Run,” was unveiled alongside a special logo created exclusively for the landmark 100th edition.

The launch also revealed several major highlights for the Centenary Race. The historic event will take place on Sunday, 13 June 2027, and will be a Down Run, with 28,000 places available. The entry process will include a ballot, while the race will offer a record R8.919 million in prize money. Organisers have also set an ambitious goal of raising R10 million for the Amabeadibeadi charities, adding an important charitable dimension to the centenary celebrations. One of the defining moments of the launch was the unveiling of the special Centenary mark, created to commemorate this extraordinary milestone in the history of the race.

The entry process begins on 25 August at 10:00 a.m. SAST, when entries open for Green Number runners, Yellow Number runners and Amabeadibeadi charity entrants.

The next phase follows on 2 September at 10:00 a.m. SAST, when entries open for Comrades Marathon Association members. This window will remain open for 72 hours or until the available entry allocation is filled, with places offered on a strictly first-come, first-served basis.

For general entrants, the process will move to a ballot system. General entries open on 9 September at 10:00 a.m. SAST, with runners able to enter the ballot until it closes on 22 September at 4:30 p.m. SAST. The ballot draw is then scheduled to take place on 23 September.

Several other crucial dates will shape the road to the historic race. The substitution period will run from 15 to 31 March 2027, while 3 May 2027 is the final deadline for runners to submit their qualifying performances, seeding information and other required entry details.

To qualify for the 2027 Comrades Marathon, runners must complete a 42.2km marathon in under five hours between 15 June 2026 and 3 May 2027.

The journey will finally culminate on Sunday, 13 June 2027, when thousands of runners are expected to line up for the historic 100th edition of the Comrades Marathon.

The 2027 race will represent a remarkable moment for the legendary South African ultramarathon. For more than a century, the Comrades Marathon has captured the imagination of runners and spectators with its extraordinary test of endurance, determination and human spirit. Its centenary edition will celebrate the generations of athletes who have faced its demanding roads, conquered its challenges and helped build one of the world's most respected endurance events.

For runners dreaming of becoming part of this historic occasion, the road to Comrades 2027 is now clearly marked. From the opening of entries in August 2026 to race day in June 2027, every deadline will matter.

The Greatest Story Ever Run is preparing for its most historic chapter yet.

American sprint standout Sam Blaskowski is taking steps toward an international future with Poland after uncovering a powerful connection to his family's ancestral homeland.

The 23-year-old sprinter, who has established himself as one of the fastest Americans of his generation with a personal best of 9.89 seconds in the 100 metres, has begun the process of obtaining Polish citizenship with the aim of eventually representing Poland in international competition.

Blaskowski's connection to the country traces back through his great-grandparents, Franciszek and Julian Błaszkowski, who emigrated from Poland to the United States in 1905. Their journey more than a century ago has now opened an unexpected new chapter for their descendant, whose athletic ambitions could soon carry the Błaszkowski name back onto the international stage under Polish colours.

The sprinter has already received support from the Polish Athletics Association as he works through the citizenship and eligibility process. Should his transfer of allegiance be completed, Blaskowski could become a significant addition to Poland's sprint programme.

His credentials certainly make the prospect an exciting one. In addition to his sub-10-second speed over 100 metres, Blaskowski owns a personal best of 19.93 seconds in the 200 metres, demonstrating the kind of versatility that could prove valuable both individually and in Poland's 4x100m relay squad.

For Blaskowski, however, the move is about more than simply changing national colours. It represents an opportunity to reconnect with his family's heritage while pursuing his ambitions at the highest level of the sport.

With his sights set on becoming part of Poland's international sprint team and competing for relay medals, Blaskowski's journey from discovering his Polish roots to potentially representing the country of his ancestors could become one of the most fascinating allegiance stories in world athletics.

A century after Franciszek and Julian Błaszkowski left Poland for America, their family's story may now be coming full circle—this time at full sprint.