Running News Daily

The gel lowers perceived heat stress, which could improve performance in warm weather.

In research to be published in the International Journal of Sport Nutrition and Exercise Metabolism, athletes who took a menthol gel during a workout in warm conditions reported feeling cooler.

Study participants also reported feeling less airway constriction and that they could breathe more freely.

This supports the growing evidence that there could be natural performance-enhancing benefits to different types of tastes when you’re working out or competing.

As we reported last year, there’s growing evidence for the performance-enhancing benefits of various tastes, independent of whatever energy the food or drink they’re in provides. That’s true for some of the most common forms—sweet, bitter, spicy, cooling—of what researchers call “tastants.”

A barrier to everyday athletes making use of this phenomenon is a dearth of commercially available sport nutrition products containing one of these tastants. So, for example, if you’re inspired by the study in which runners improved their 1500-meter time after taking a capsule containing capsaicin, the chemical that gives chili peppers their heat, you’ll have to come up with a DIY solution, such as swilling diluted hot sauce.

There might soon, however, be an easy-to-use option for people wanting to capitalize on research showing improved performance in the heat after athletes ingest menthol taste solutions. GU Energy Labs is developing a mint-flavored menthol gel that, in research to be published in the International Journal of Sport Nutrition and Exercise Metabolism, imparted a significant cooling sensation when taken during warm-weather training. The basic idea is that such a gel could make exercising in the heat feel more comfortable, and thereby encourage athletes to go faster or longer.

For the study, 40 national- or world-class endurance athletes consumed a gel on three separate workouts done in average conditions of 78 degrees Fahrenheit and 56 percent relative humidity. The participants were split evenly between men and women; 19 were cyclists, 15 were race walkers, and six were runners. During one workout, they downed a gel with a menthol concentration of 0.5 percent, during another they had a gel with a menthol concentration of 0.1 percent, and during the third they consumed a mint-flavored placebo gel that contained no menthol.

Both of the menthol gels imparted a cooling sensation, while the placebo didn’t. Participants reported feeling cooler for two to 15 minutes after taking the lower-concentration menthol gel, and for up to 45 minutes after using the higher-concentration one. However, half of the athletes said the cooling sensation was too intense after the higher-concentration gel. The lower-concentration gel received a better overall rating on the confluence of cooling, mint flavor intensity, and sweetness. That’s the one that Gu is continuing to develop in collaboration with Southern Cross University in Australia.

How does this phenomenon work?

“The chemical compound in menthol activates receptors linked to temperature-sensing neurons that send your brain information about the presence of cold stimuli,” Roxanne Vogel, who developed the gel as the focus of her Ph.D. research, told Runner’s World. “Essentially, menthol ‘turns on’ the same messaging pathway that responds to cold, so you get the sensation of cooling without any actual change in temperature.” 


Many of the study participants also reported feeling less airway constriction, and that drinks tasted colder, after they consumed the menthol gels. Cold/menthol receptors in the upper respiratory tract “can provide a sensation of increased ventilation,” Vogel said. “This is why menthol is commonly used in medicinal chest rubs and cough drops.”


Vogel’s explanation meshes with my own individual experience taking the lower-concentration menthol gel during a few long runs. The cooling sensation was more or less immediate, and strong. (Whether I needed a cooling sensation during winter in Maine is another matter, but duty calls.) I also felt I could breathe more freely. The latter sensation can’t be ascribed to the power of suggestion, because I hadn’t yet read the full study text in which participants reported the same feeling.

I’m now saving my remaining prototypes for this summer, to use them in their intended conditions. When I do so, I’ll be sure to remember a caveat noted in Klein’s quote above and in other research on the topic: Don’t confuse the feeling of being cooler with actually being cooler. Again, menthol lowers your perception of warmth, but doesn’t affect your core temperature, which will rise when you run in hot weather.

Gu is planning real-world field testing of the menthol gel this summer to help decide the product’s release date , according to Magdalena Lewy Boulet, the Olympic marathoner and Western States 100 champion who is the company’s senior vice president of innovation, research, and development.

Three extraordinary performances that captivated the athletics world have now been officially ratified by World Athletics, with Jacob Kiplimo, Ja’Kobe Tharp and Emmanuel Wanyonyi securing their places in the history books with remarkable world-record performances.

Uganda’s Jacob Kiplimo delivered a breathtaking 57:20 at the EDP Lisbon Half Marathon on 8 March 2026, producing what was then a spectacular world record. His performance underlined his exceptional ability over the half-marathon distance and further strengthened his status as one of the finest road runners of his generation.

American hurdler Ja’Kobe Tharp created his own piece of history in Eugene on 10 June 2026, storming to 12.75 seconds in the 110m hurdles. The sensational performance came with a legal +1.0m/s following wind and established Tharp as the new world record-holder, marking a remarkable breakthrough on the global stage.

Kenya’s Emmanuel Wanyonyi completed the trio with a sensational 2:11.83 world record in the 1000m. The Olympic champion produced the performance in Monaco, lowering Noah Ngeny’s long-standing 2:11.96 world record from 1999. It was another extraordinary demonstration of Wanyonyi’s speed, strength and versatility beyond his specialist 800m distance.

What makes the three records particularly special is the variety of disciplines involved. Kiplimo conquered the demanding half marathon, Tharp mastered the technical challenge of sprint hurdling, while Wanyonyi extended his middle-distance brilliance over 1000m. Each performance showcased a different form of athletic excellence, yet all three athletes reached the same extraordinary destination: the world-record books.

Accuracy Note: Kiplimo’s 57:20 has since been surpassed by Ethiopia’s Yomif Kejelcha, who ran 56:51 at the Media Maratón Ciudad de Buenos Aires on 23 August 2026, taking 29 seconds off Kiplimo’s mark. The newer performance was still listed as pending ratification, meaning Kiplimo’s mark had been overtaken on the clock even as his record was among those formally ratified.

The ratification of the Kiplimo, Tharp and Wanyonyi performances nevertheless gives official recognition to three spectacular moments that will remain significant chapters in the 2026 athletics season.

Three athletes. Three extraordinary performances. Three officially ratified world records. From Lisbon to Eugene and Monaco, Kiplimo, Tharp and Wanyonyi have added another unforgettable chapter to the story of athletics

Uganda’s rapidly rising distance-running star Harbert Kibet has been provisionally suspended by the Athletics Integrity Unit (AIU) over the alleged presence and use of prohibited substances.

The 21-year-old is facing allegations involving triamcinolone acetonide and exogenous steroids, with the substances reportedly confirmed through Isotope Ratio Mass Spectrometry (IRMS) analysis. The development brings an abrupt halt to what had appeared to be the emergence of one of Uganda’s most promising young distance-running talents.

Kibet had enjoyed a remarkable breakthrough in February when he made his road 10-kilometre debut at the 10K Facsa Castellón in Spain. He produced a stunning performance to win in a world-leading 26:39, a time that placed him at No. 4 on the all-time road 10K list at the time and immediately elevated his status in international distance running.

His rapid rise had already earned him opportunities to represent Uganda on the global stage. Kibet competed for his country at the World Championships in Tokyo last year, although he did not progress beyond the heats.

His most recent competition came in May at the Xiamen Diamond League, where he finished 15th in the men's 5000 metres in 13:46.45. He has not competed since that race.

The provisional suspension now casts uncertainty over the immediate future of an athlete whose spectacular 10K performance earlier this year had generated enormous excitement. However, it is important to stress that a provisional suspension is not a final finding of an anti-doping rule violation.

The case will now continue through the appropriate anti-doping process, during which the evidence and circumstances surrounding the allegations will be considered before any final decision is reached.

For Kibet, the development represents a dramatic and unexpected turn in a season that had begun with one of the most remarkable performances in the history of road distance running. The athletics world will now await further developments as the AIU process moves forward.

The women’s 100m hurdles is set for a spectacular showdown at the Brussels Diamond League Final on September 5, where Olympic champion Masai Russell will lead one of the strongest fields of the season in the battle for the coveted Diamond Trophy.

Russell arrives in Brussels in extraordinary form and as the athlete everyone will be chasing. The American star has enjoyed a remarkable season, combining consistency with breathtaking speed, and recently delivered another unforgettable performance when she ran a sensational 12.09 seconds in Zurich to break the world record.

That performance further strengthened Russell’s position as the dominant force in the event. Her remarkable consistency has been equally impressive, with the Olympic champion winning all 10 of her finals so far this season. With 48 points, she also finished at the top of the Diamond League standings during the regular season.

However, the points race is now behind her. In Brussels, everything comes down to one final. The Diamond League Final offers no room for complacency, and Russell will have to defeat an exceptional collection of world-class hurdlers to leave Belgium with the Diamond Trophy.

Among her biggest challengers is Nigeria’s Tobi Amusan, one of the finest hurdlers of her generation and a former world record holder. The field also includes Dutch star Nadine Visser, Bahamas standout Devynne Charlton and Poland’s Pia Skrzyszowska, ensuring that Russell will face serious opposition over every hurdle.

American Alaysha Johnson, Jamaica’s Megan Simmonds and Belgium’s Yanla Ndjip-Nyemeck complete a fascinating eight-athlete lineup for what promises to be one of the highlights of the Diamond League Final.

With Russell’s unbeaten record, her recent world-record performance and the Diamond Trophy on the line, the pressure will be immense when the athletes take their marks. Yet in an event as unpredictable and technically demanding as the 100m hurdles, one mistake can completely change the outcome.

Russell may arrive as the overwhelming favourite, but Brussels offers her rivals one final opportunity to produce something special. The stage is set for a thrilling race between the fastest and most accomplished hurdlers in the world—and after a season of dominance, Russell now has one more hurdle to clear in her pursuit of Diamond League glory.

Women’s 100m Hurdles Final Start List

 1. Masai Russell — United States

 2. Tobi Amusan — Nigeria

 3. Nadine Visser — Netherlands

 4. Devynne Charlton — Bahamas

 5. Pia Skrzyszowska — Poland

 6. Alaysha Johnson — United States

 7. Megan Simmonds — Jamaica

 8. Yanla Ndjip-Nyemeck — Belgium

One race. Eight elite hurdlers. One Diamond Trophy. Will Masai Russell complete another unforgettable chapter of her remarkable season, or will Brussels produce a surprise?

The 2026 Bank of America Chicago Marathon is set to introduce an important new innovation that could change the way runners approach hydration during major road races.

For the first time, participants in an Abbott World Marathon Major will have the opportunity to refill their own approved, self-carried hydration containers while competing on the course. The initiative will make its debut through four Culligan Water Refill Stations strategically positioned along the 26.2-mile route.

The refill stations will be located shortly before Aid Station 4 at Mile 5.7, Aid Station 7 at Mile 10.1, Aid Station 12 at Mile 15.7 and Aid Station 16 at Mile 20.3. At each location, runners carrying approved personal hydration gear will be able to stop and refill with Culligan-filtered water before continuing their race.

The move represents a significant step forward for one of the world's most prestigious marathons. Chicago will become the first Abbott World Marathon Major to formally provide runners with the opportunity to refill personal hydration containers during the race, opening the door to a potentially more sustainable approach to supporting thousands of participants over the marathon distance.

Beyond the environmental benefits, the initiative will also be fascinating to watch from a sporting perspective. Hydration is a crucial part of marathon performance, particularly for runners competing over more than two hours and for the many recreational athletes spending considerably longer on the course. The effectiveness and convenience of the refill stations, as well as how smoothly runners are able to use them without disrupting their rhythm, will be closely observed.

The project is also designed to reduce reliance on single-use hydration products while giving runners greater flexibility and control over how they manage their fluids during the race. If successfully implemented, Chicago's new approach could provide an important example for other major endurance events around the world.

Culligan International President and Chief Operating Officer Al Hamood said the company's involvement reflects its wider commitment to innovation, sustainability and improving the race-day experience for athletes.

The 2026 Chicago Marathon will therefore offer much more than another spectacular day of elite racing and personal achievement. It will also serve as a live test of an idea that could help shape the future of hydration at major marathons.

When the 2026 Bank of America Chicago Marathon gets underway, runners will not only be racing against the clock—they will also be part of something entirely new. At four points along the legendary 26.2-mile course, a simple refill could become a glimpse into the future of marathon running. The real question will be how smoothly thousands of athletes embrace the system and whether Chicago's bold experiment can set a new standard for the sport. If it succeeds, the ripple effect could extend far beyond the streets of Chicago, inspiring major races around the world to rethink how they keep runners hydrated while reducing waste. In 2026, one of marathon running's biggest stages will be testing a small but potentially game-changing idea—proving that sometimes the future of the sport may be waiting at the next water refill station.

Indianapolis is set to become the home of American indoor track and field for the next two years after USA Track & Field confirmed that the city will host the 2027 and 2028 USATF Indoor Championships at the Indiana State Fairgrounds.

The nation’s leading athletes will compete at the Indiana Farm Bureau Fall Creek Pavilion, with the 2027 championships scheduled for February 19–21, followed by the 2028 edition from February 18–20.

The announcement marks a significant moment for Indianapolis and its long-standing connection with the sport. The 2027 championships will take place 40 years after the city hosted the inaugural World Indoor Championships at the Hoosier Dome in 1987, bringing another major chapter of elite indoor athletics back to a city with a rich track and field history.

Although Indianapolis is home to USA Track & Field's national office and has hosted major athletics competitions over the years, the upcoming editions will be the first time the city has staged the USATF Indoor Championships. The Indiana State Fairgrounds has nevertheless developed into an increasingly important venue for the sport, providing a major platform for elite indoor competition.

The consecutive championships will give athletes two years of high-stakes competition on one of America's growing indoor stages, with national titles and places among the country's finest athletes once again on the line.

The 2028 USATF Indoor Championships will carry even greater significance, serving as a selection event for athletes hoping to represent the United States at the 2028 World Athletics Indoor Championships in Odisha, India. That will add another layer of intensity to the competition as athletes battle not only for national honours but also for the opportunity to compete on the global stage.

For Indianapolis, the return represents more than simply hosting another national championship. Four decades after welcoming the world's finest athletes for the inaugural World Indoor Championships, the city is preparing to once again place track and field firmly in the national spotlight.

With two consecutive editions now secured, Indianapolis is ready to welcome America's best indoor athletes as they chase national glory, international selection and the chance to create another memorable chapter in the city's proud athletics history.