Running News Daily

Research shows economy gains at slower paces, but they’re smaller and not guaranteed.

It’s no coincidence that running records have been falling in droves in the era of super shoes. While researchers still may not be able to fully explain how the technology works, they have shown that the ultra-compressible foam, curved carbon-fiber plate, and rockered geometry that first appeared in the Nike Vaporfly 4% in 2017 provide competitive runners a 2.7–4.2 percent boost in running economy. In other words, thanks to these shoes, runners need 2.7-4.2 percent less energy to run the same pace—meaning that they can conserve that energy to run farther or expend it to run faster.

One caveat is that, until now, super shoes have been tested only at running speeds of 7:26/mile or faster. Translated into marathon times, that means the science is applicable to someone who runs a marathon in 3:15 or faster—a feat accomplished by only 21 percent of the 2021 Boston Marathon field.

However, new research has finally emerged that looks at whether the majority of runners get an edge from super shoes. The answer: probably yes, but less.

Research for Non-Elites

Dustin Joubert, Ph.D., a kinesiology professor at St. Edward’s University in Austin, Texas, likes to do research, in his words, “for the people.” This is how he came to conduct a study looking into whether super shoes, specifically the Nike ZoomX Vaporfly Next% 2, confer the same running economy advantage to athletes who run at slower paces.

“There’s a lot of people who don’t fit under the umbrella of the speeds that have been tested in all this laboratory research, and a lot of people are asking: Should I spend my money on this? Do they work for slower people?” said Joubert. “That was the next logical question to me.”

To answer the question, Joubert and his colleagues recruited 16 runners—eight men and eight women with prior-year 5K PRs averaging 19:06 and 20:18, respectively—and had them complete two sets of four 5-minute running reps on a treadmill. Each runner ran one set at a 12 kilometers/hour pace (8:00/mile, which would be marathon pace for a runner with a 5K PR of 22:15), and the other set at 10K/hour (9:40/mile, which would be on the slower end of easy pace for that same 22:15 5K runner). Within a given set, the runners tested two different shoes: they ran one 5-minute rep in an experimental carbon-plated shoe, the Nike ZoomX Vaporfly Next% 2, and the other rep in a control shoe, the Asics Hyper Speed. Then, the runners repeated the reps but reversed the order in which they wore shoes (e.g., Asics first, then Nike).

The researchers chose the Asics Hyper Speed as the control shoe because it lacks the technology of the Vaporfly (carbon plate and advanced foam) but matches its mass. This was an important variable to match because mass affects running economy; a heavier shoe will require more energy to move and could therefore confound results. One earlier study compared the Vaporfly to runners’ everyday training shoes, but most regular training shoes are more than 100 grams (3.5 ounces) heavier—the equivalent of about 40 pennies. Imagine lifting those pennies 55,000 times (the average number of steps in a marathon, for men; women take about 63,000 steps). That would require quite a bit more energy!

Economy Advantages for 3:30–4:15 Marathoners

The new study found that, on average, running economy was better in the Vaporfly than in the Hyper Speed. However, at these slower speeds, the improvements were smaller than at faster speeds: runners gained just 1.4 percent in running economy at 8:00/mile pace and 0.9 percent at 9:40/mile pace, compared to the 2.7–4.2 percent advantage runners gained at speeds of 7:26/mile or faster. (And, as we’ll see below, even those improvements came with a caveat.)

Joubert speculates that the reason for this difference comes down to how the foam in the shoes is working. Much of the running economy advantage comes from compressing the compliant/resilient foam in the shoes and then having that energy returned as the foam springs back. A faster runner who is generating larger ground reaction forces will compress the foam more than a slower runner who, because of their speed, isn’t generating as much ground reaction force. 

“The shoe is not creating energy for you; it’s only giving back what you put into it,” explained Joubert.

Not Everyone Benefits

Before you decide “an advantage is an advantage,” there is one other finding from this study that should give runners pause. While the results from the 16 test subjects showed a 0.9–1.4 percent average improvement in running economy, one third of the participants actually showed worse running economy when they ran at the 9:40/mile speed in the Vaporflys, compared to the control shoe. This finding diverges from the results of testing done on the Vaporflys at faster speeds, where runners experienced varying degrees of running economy improvement, but no one saw a detriment.

One possible reason has to do with the Vaporfly’s carbon plate. Research has shown that increased longitudinal bending stiffness, or the rigidity of a shoe underfoot, helps to improve running economy at faster speeds by reducing the amount of energy your foot requires as you land and push off from the metatarsophalangeal joint (where your foot connects with your toes). Joubert hypothesizes that, at slower speeds, the stiff carbon plate might stop saving runners energy and instead create a need for more energy in order to get “up over” the plate.

“If the plate’s really stiff, maybe at these slower speeds that’s an impairment to economy,” Joubert said.

Nathan Brown, a doctor of physical therapy at Pineries Running Lab in Stevens Point, Wisconsin, and senior contributor at Doctors of Running, said that this finding in particular helps to reinforce the shoe selection guidance he already offers his patients and the runners he coaches.

“If your goal of picking a shoe for race day is to get faster, but there’s a 30 percent chance that you get worse, I care more about finding the shoe that you like to run in than the shoe that may or may not give you a benefit,” said Brown.

So, Should You Wear Super Shoes?

If you’re an 8:40-9:00/mile marathoner, what should you do? Do you gamble on being in the 66 percent of responders and plunk down your cash for a pair of super shoes? Or do you stick with what you have?

Footwear is ultimately a personal decision, so here are a few more points to consider.

Choose a shoe that’s comfortable. 

If a super shoe feels uncomfortable, that might be an indicator that the shoe won’t help you make the economy gains you’re seeking. Joubert guesses that the comfort of your shoes could affect biomechanical aspects of your race-day performance, including economy. “I think if a shoe is uncomfortable, it’s probably not going to be economical,” he said.

Brown emphasizes focusing on comfort and confidence in a race-day shoe rather than “carbon [plate] or no carbon.” To determine whether it’s comfortable, Brown recommends trying your racing shoe in a few workouts and, if your goal race is a marathon, a few long runs in advance of race day.

“You want to feel comfortable [in the] shoe and confident psychologically,” he said. “To know what to expect on a long run from your race-day shoe can be a big deal for performance.”

Don’t wear a super shoe (or any one shoe) for every single run.

Heather Knight Pech, a decorated masters runner and coach for McKirdy Trained and Knight Training, tells every one of her athletes, from high schoolers to masters runners, to invest in a minimum of three pairs of running shoes: a trainer (e.g., Brooks Ghost), a lightweight trainer (e.g., New Balance Rebel), and a race-day shoe (e.g., Nike Vaporfly Next%). She then has them rotate among these shoes for several reasons. First, it decreases injury. Research has shown that runners who rotate their shoes decrease their injury risk by 39 percent compared to runners who wear the same pair for every run.

“Running is a repetitive motion, so you avoid overloading any one muscle, bone, or tendon,” said Pech. “And on the flip side, you’re simultaneously strengthening other structures by rotating your shoes.”

In his physical therapy practice, Brown has found that super shoes tend to reduce the loading on lower leg structures like the Achilles tendon and calf. As a result, he’s noticed a trend in repetitive stress injuries further up the chain, to the hamstrings and hip flexors, in runners who wear that shoe for most or even all of their runs.

The second reason Pech advises runners to rotate shoes is that it forces them to decide between shoes for a given run, which helps them gain a better sense of self-awareness. “We should be very dialed in to how we feel—that’s part of running training and racing,” said Pech. The saying she repeats is: different shoes for different runs for different days.

Look at a variety of styles and brands.

The Nike Vaporfly was the first high-stack carbon-plated shoe on the market, and as a result, it is arguably the most well known. Most brands now have a similar shoe, and while research shows they’re not yet up to par when it comes to running economy, that doesn’t mean different shoes won’t work better for certain runners based on foot anatomy, running stride, and even pure preference.

Pech points out that the Nike Vaporfly is a very high, very narrow, very bouncy shoe. The Saucony Endorphin Pro, on the other hand, she describes as “more stable underfoot, with firmer foam. It’s great for runners who want to feel the ground.” Meanwhile, the Asics Metaspeed, which is also slightly wider underfoot than the Nike Vaporfly, offers two versions between which runners can choose based on their running style: cadence (increasing their turnover) or stride (increasing their stride length).

“I think they’ve all caught up, in that, now, there are different shoes for different people,” said Pech.

Remember: economy isn’t everything.

While running economy does influence running performance, it’s only one small part; how well you eat and sleep, your level of anxiety, how consistently you trained, how well you tapered, and numerous other factors have an equal, if not greater effect on the time you ultimately run in any given race.

Therefore, if you’re a 3:30–4:15 marathoner and don’t want to shell out the money or risk finding yourself in the 33% “anti-responder” group, double down on some basics like pre- or post-run nutrition or even just sleep. Plus, when you beat your Vaporfly-wearing counterparts, you’ll never have to ask, “Was it the shoes?”

The prospect of seeing one of athletics' biggest stars back on the track is growing stronger, with Jakob Ingebrigtsen reportedly targeting a return to competition later this summer following his recovery from Achilles tendon surgery.

According to comments made by his agent, Daniel Wessfeldt, in an interview with Norwegian media, the double Olympic champion could make his long-awaited comeback at one of three major European meetings in July. The leading options under consideration are the Monaco Diamond League on July 10, the Hungarian Athletics Grand Prix on July 14, and the London Diamond League on July 18.

For athletics fans, the possibility of Ingebrigtsen lining up in London would add another layer of excitement to an already highly anticipated Diamond League meeting. The Norwegian middle-distance sensation has become one of the sport's most dominant figures in recent years, collecting Olympic, world and European titles while consistently rewriting record books.

His 2026 campaign was put on hold after he underwent surgery on his Achilles tendon earlier this year, forcing him to focus on rehabilitation rather than competition. Since then, questions have surrounded when the 24-year-old would be ready to return to racing.

The latest update suggests that decision will largely depend on how his training progresses over the coming weeks. If recovery continues according to plan, July could mark the beginning of his return to elite competition ahead of the latter stages of the season.

A comeback at either Monaco, Budapest or London would immediately place Ingebrigtsen back among the sport's biggest storylines. Each meeting is renowned for producing world-class performances, and any appearance by the Norwegian would attract significant attention from fans eager to see how quickly he can regain top form after his injury setback.

While no final decision has been confirmed, the signs are increasingly positive. After months away from competition, Jakob Ingebrigtsen appears to be edging closer to a return, with London's Diamond League meeting emerging as one of the most intriguing possibilities on his road back to the track.

Should his recovery continue smoothly, athletics could soon welcome back one of its brightest and most influential stars.

What should have been the defining moment of Emad Bashir-Mohammed's young running career instead turned into one of the most talked-about controversies in American road racing this year.

The 23-year-old crossed the finish line first in the men's citizen's race at the prestigious Bolder Boulder 10K on Memorial Day in Colorado, stopping the clock at an impressive 29:50. His performance was not only a commanding victory but also one of the fastest winning times ever recorded in the event's long and celebrated history. Bashir-Mohammed finished eight seconds clear of his nearest challenger and appeared to have secured a breakthrough triumph.

For nearly two hours, he was the undisputed winner.

Then everything changed.

Race officials announced that Bashir-Mohammed had been disqualified after determining that he had started in the wrong wave. According to Bolder Boulder regulations, he had been assigned to the AA wave but lined up with the faster A wave, which began earlier. Event rules allow runners to move backward into a slower wave, but prohibit athletes from advancing into a faster one.

As a result, Bashir-Mohammed's victory was erased from the record books.

The citizen's title was subsequently awarded to Nickolas Scudder, who crossed the line second in 29:58. The promotion handed Scudder back-to-back citizen's race victories, while Bashir-Mohammed was left to grapple with the disappointment of losing a win he believed he had earned on the road.

The disqualification has since ignited widespread debate across the running community.

Bashir-Mohammed maintains that he did not intentionally violate the rules. He claims that after collecting his AA bib, he spoke with race personnel and was permitted to start with the A wave after presenting evidence of his recent performances. In a statement shared after the race, he expressed frustration over the decision, arguing that his goal was simply to compete against the strongest field available and produce the fastest time possible.

Race organizers, however, stood firmly behind their ruling. Officials stated that wave-assignment regulations are clearly communicated in pre-race information and reiterated during packet collection. They also noted that hundreds of participants are disqualified each year for moving into faster start groups, emphasizing that consistent enforcement is necessary to maintain fairness for all competitors.

The incident has divided opinion among runners and fans alike. Some believe the rules must be applied equally regardless of an athlete's finishing position, arguing that wave assignments are a fundamental part of race organization. Others feel the punishment is harsh, particularly if Bashir-Mohammed genuinely received approval to move up before the start.

What remains undisputed is the quality of his performance. On the roads of Boulder, Bashir-Mohammed demonstrated the fitness and speed required to outrun the field by a significant margin. Yet in road racing, crossing the finish line first is only part of the equation. Compliance with race regulations carries equal weight.

For Bashir-Mohammed, the day will be remembered as a painful lesson in the fine margins that can define elite competition. A remarkable run delivered a memorable victory, but a dispute over wave placement ultimately overshadowed the achievement, leaving behind a controversy that continues to fuel discussion throughout the running world.

A fast race, a costly administrative error, and a debate that may linger long after the finish-line tape has been packed away.

The men's 100 metres at the 2026 Rome Diamond League is shaping up to be one of the most anticipated sprint races of the season, with an exceptional field featuring some of the fastest men in the world.

Scheduled for Thursday, June 4, at the iconic Stadio Olimpico in Rome, the race will bring together reigning stars, established champions and emerging talents in a contest that promises fireworks from the moment the gun goes off.

Kenya's Ferdinand Omanyala headlines a world-class lineup that includes American sprint sensation Noah Lyles, Botswana's Olympic champion Letsile Tebogo, Jamaica's explosive Ackeem Blake, South Africa's ever-consistent Akani Simbine and Italy's hometown hero Lamont Marcell Jacobs. With personal bests ranging from 9.77 to 9.97 seconds, the field is packed with athletes capable of producing something special on the Diamond League stage.

Omanyala, the African record holder with a blistering personal best of 9.77 seconds, arrives in Rome eager to continue his strong early-season form and prove he can challenge the very best on the global circuit. The Kenyan star has built a reputation as one of the fastest starters in world sprinting and will be looking to make a statement against an elite field.

Standing in his way is world champion Noah Lyles, whose personal best of 9.79 seconds places him among the fastest athletes in history. The American remains one of the sport's biggest attractions and will be determined to add another Diamond League victory to his impressive résumé.

The race also marks a major test for Olympic champion Letsile Tebogo. The Botswanan star has rapidly become one of athletics' most exciting talents, while Ackeem Blake continues to establish himself as a serious contender on the international sprint scene.

Adding further intrigue is the presence of Italy's Lamont Marcell Jacobs. Competing on home soil, the Tokyo Olympic champion will enjoy passionate local support as he seeks to deliver a memorable performance in front of the Roman crowd.

South Africa's Akani Simbine, Cameroon's Emmanuel Eseme, Great Britain's Jeremiah Azu and rising American talent Jordan Anthony complete a field that boasts remarkable depth and quality.

Men's 100m Entry List – Rome Diamond League 2026

Ferdinand Omanyala (Kenya) – PB: 9.77

Noah Lyles (USA) – PB: 9.79

Lamont Marcell Jacobs (Italy) – PB: 9.80

Akani Simbine (South Africa) – PB: 9.82

Letsile Tebogo (Botswana) – PB: 9.86

Ackeem Blake (Jamaica) – PB: 9.88

Jordan Anthony (USA) – PB: 9.91

Emmanuel Eseme (Cameroon) – PB: 9.96

Jeremiah Azu (Great Britain) – PB: 9.97

With multiple national record holders, global champions and Olympic medal contenders sharing the same start line, the Rome Diamond League men's 100m could deliver one of the fastest races of the year. For sprint fans around the world, all eyes will be on Rome as a stellar cast battles for supremacy over athletics' blue-riband distance.

Audrey Werro announced her arrival as one of the early stars of the 2026 outdoor season with a commanding victory in the women’s 800 metres at the Rabat Diamond League, producing a performance that exceeded even her own expectations.

The Swiss middle-distance talent surged to victory in a brilliant 1:56.56, breaking the meeting record and delivering one of the fastest times recorded worldwide this season. In a race packed with quality, Werro displayed exceptional composure, confidence, and finishing strength to separate herself from the field and stamp her authority on the event.

What made the performance even more remarkable was the athlete's surprise at the level she had already reached so early in the campaign.

"I was not expecting such a strong start to the season," Werro admitted after the race.

The race unfolded at a relentless pace, but Werro remained perfectly positioned throughout. As the athletes approached the bell lap, she glanced at the clock and immediately sensed something special was within reach.

"When I saw the time at the bell, I felt really confident," she said. "I'm really happy with the Meeting Record and looking forward to the rest of the season."

Her confidence proved justified. Maintaining her rhythm over the final 400 metres, Werro powered down the home straight to secure the victory and rewrite the Rabat meeting record books in the process.

The performance sends an early warning to her rivals ahead of a season that promises major championships and high-profile Diamond League battles. Beyond the record-breaking time, Werro's display highlighted her growing maturity as a racer, combining tactical awareness with impressive speed and endurance.

With the outdoor season only beginning, the 1:56.56 clocking suggests that even faster times could be on the horizon. If Rabat is any indication, Audrey Werro may be poised for the biggest season of her career.

Her emphatic victory in Morocco was more than just another Diamond League win—it was a statement of intent from an athlete determined to challenge the world's best throughout 2026.

The city of Boston is set to welcome back one of its most celebrated champions as Kenya’s Sharon Lokedi headlines a world-class field for the 2026 B.A.A. 10K presented by Mass General Brigham Cancer Institute on June 21.

Fresh from another remarkable victory at the Boston Marathon in April, Lokedi returns to the streets of Boston and Cambridge carrying both momentum and confidence as she aims to defend the title she captured in dominant fashion last year.

The two-time Boston Marathon champion has developed a special connection with the historic race city. In 2025, she produced a course-record performance of 2:17:22 to win the Boston Marathon before returning this year to claim another victory in 2:18:51, the second-fastest winning time in the event’s storied history. Her success has cemented her status as one of the premier road runners in the world.

Lokedi will be making her first competitive appearance since her marathon triumph and arrives as the reigning B.A.A. 10K champion after clocking 31:39 over the challenging 6.2-mile course in 2025.

“Boston has become a very special place for me,” Lokedi said ahead of the race. “The atmosphere created by the fans and the community is unlike anywhere else. I’m excited to return and give everything I have to defend my title.”

The women’s race promises to be highly competitive. American Olympian Rachel Smith, who finished second at the Boston 5K in April, leads the domestic challenge. Kenya’s strong contingent includes African 10,000m champion Gladys Kwamboka, former B.A.A. 10K runner-up Stacy Ndiwa, and experienced road racer Viola Cheptoo. British Olympian Jessica Warner-Judd adds further international depth to a field packed with proven performers.

The men’s race is equally impressive, featuring elite athletes from 13 nations.

Ethiopia’s Dawit Seare enters as one of the leading contenders after capturing the 2025 Boston 5K title and bringing the fastest 10K personal best in the field at 27:21. Kenya will be represented by an accomplished group led by Alexander Mutiso, winner of the 2024 London Marathon and runner-up at last year’s New York City Marathon.

Patrick Kiprop also arrives in outstanding form after securing victory at the prestigious BolderBoulder 10K on Memorial Day, while Alex Masai returns looking to continue his strong record in Boston. Masai recently finished ninth at the Boston Marathon and has earned three top-ten finishes at the B.A.A. 10K.

Among the international stars making their mark is South Africa’s Adriaan Wildschutt, who makes his race debut after an impressive season highlighted by victory at the NYC Half Marathon in 59:30. Ethiopia’s Olympic bronze medallist Hagos Gebrhiwet adds further quality to the field, bringing a wealth of championship experience and previous success in Boston.

Canadian national 10K champion Andrew Alexander, two-time U.S. Olympian Hillary Bor, marathon standout Ryan Ford, and reigning USA 25K champion Andrew Colley complete a field stacked with talent and depth.

With defending champions, Olympic finalists, national champions and rising stars all converging on Boston, the 2026 B.A.A. 10K is shaping up to be one of the most competitive editions in recent memory. For Sharon Lokedi, however, the mission is simple: return to the city where she has repeatedly excelled and add another memorable chapter to her growing Boston legacy.