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Rise of the “Illegal” Running Shoes

Super trainers are fast, fun, and maybe a little risky. Here’s what to know about these max-cushioned shoes. 

Banned shoes emerged courtside long before they found their way onto a marathon course. Legend has it that nearly 40 years ago, Michael Jordan laced up a pair of red-and-black high-tops in violation of the NBA’s approved uniform colors. 

In 2010, the league cracked down again—this time, for reasons besides aesthetics—on a pair of basketball shoes that were shown to increase a player’s vertical-jump height. Today, Nike’s Air Jordan brand is a household name and multibillion-dollar business, and shoemaker Athletic Propulsion Labs (APL) has since released additional banned styles (Superfuture and Concept X) of its performance-boosting kicks.

Though some speculate these bans were mostly crafty marketing, the same can’t be said about the wave of “illegal” shoes that is flooding the roadways on the feet of runners. Super shoes have proven a true performance boon to both elites and recreational runners on race day. Now the tech has trickled down to shoes for daily runs, ushering in super-thick, though still permissible, shoes that have created their own category: super trainers.

What Is a Super Trainer?

Technically, a formal definition doesn’t exist. But we’ll establish some general parameters.

Super trainers share many of the same qualities as super shoes built for race day: a tall stack height, efficient midsole geometry, high-powered super foam, and usually some sort of plate. But these trainers aren’t meant for racing, like a Nike Vaporfly or Saucony Endorphin Elite—they’re designed for everyday mileage.

Super shoes for racing have to balance cushioning and propulsion, but still be lightweight. Super trainers, though, can have beefier constructions that help to extend their life spans. For example, shoe brand On guarantees only four marathons from the Cloudboom Echo 3—that’s little more than 100 miles. Super trainers can handle more mileage, and should have the typical 300- to 500-mile range of a normal running shoe.

To do that, they may have more outsole rubber for durability. Their uppers are usually softer and thicker than a racing shoe’s, as well, with comfortably cushioned ankle collars and tongues. They tie up with sturdier laces and offer a more forgiving fit overall, closer to what you’d expect from a workhorse daily trainer. And, since super trainers aren’t made to toe a starting line, brands can pile on midsole foam in excess of the 40mm limit imposed by World Athletics.

But they’re more than just extremely cushioned running shoes. Super trainers have additional mechanisms and “super foams” geared toward running efficiency and energy return, explained below.

Anatomy of a Super Trainer

If we break down a super trainer into its key components, we see a recurring theme: a stack of super foam in the ballpark of 40mm (or more), a carefully sculpted midsole shape for propulsion, and a plate that harnesses those pieces and holds it all together. This is the tech that puts the “super” in super trainers; it needs to interact with the foot and the rest of the kinetic chain in specific ways to deliver the intended ride and energy return. 

Here’s what’s happening inside the midsole under your foot, and how these elements work to boost your stride. 

1. Rocker Geometry

When we talk about a rocker sole, we’re describing the curvature of the bottom of the shoe’s sole. Both the heel and the toe curve upward, away from the ground, to give the shoe a more rounded base. The result is a shape like that you’ll find on a rocking chair. This is needed because the shoes are so thick, they don’t bend under the forefoot for a smooth transition during your gait cycle. 

Shoe developers can also manipulate the inflection points of the rockers around a runner’s pace and foot strike to potentially manipulate transition time. Usually, you’ll find the most aggressive rocker designs in racing shoes. Still, pronounced rocker soles on super trainers are essential to make transitions comfortable. 

→ How do rocker soles work?

Rocker soles in shoes function to mimic the natural rockers of the foot to make us feel more efficient. The foot has three functional rockers—the heel (first), ankle (second), and forefoot (third)—that we use while walking and running. The heel bevel in a shoe prepares the foot to contact the ground and smooths out the shoe’s ride when you land. Forefoot rockers assist movement during toe-off, which generally means the toes and ankle joint don’t have to work as hard. 

For some runners, a stiff rocker sole can decrease demand on the calves by transitioning effort upward to the knee and hips. A runner’s experience will depend on their specific biomechanics, where the rocker is placed, and how their footstrike contacts it.

2. Super Foam

Polyether Block Amide, or PEBA, is a common foam compound for super trainer midsoles. (A popular trade name for the material is Pebax, made by a company called Arkema.) It’s the basis for foams like Nike ZoomX, Saucony Pwrrun PB, Puma Nitrofoam, and Asics FF Blast Turbo. Many of those brands leverage the same foam used in their top-tier racing shoes for their super trainer models.

Right now, PEBA-based foams lead the way for energy return. While current research and our own testing indicates that supercritical EVA and TPU blends are also impressive, PEBA has the edge more often than not. Why? It’s lighter than TPU and far softer and bouncier than supercritical EVA. Some iterations are firmer than others, depending on which brand’s flavor you try.

→ How does foam work?

Cushioning serves to absorb shock upon landing and provide overall comfort while running, but it can also return energy to the runner and stabilize the shoe. PEBA foams are especially lightweight, so brands can pile it on—both in thickness and in width—without the same weight penalty applied when using EVA or TPU materials. The additional width is just as important as the height. These shoes often need a wide platform of midsole material to remain stable.

Every brand’s PEBA-based foam compresses at a different rate, with varying amounts of responsiveness, so each offers a unique benefit based on the runner. For example, runners who land with lots of force can bottom out and crush a foam that’s too squishy, so they may prefer a firmer platform. A harder midsole can offer more support without any additional stability elements. On the other hand, a softer foam can provide more comfort, and research suggests that it may have a protective benefit for lighter runners. 

Keep in mind that dozens of pieces within a shoe, as well as countless runner-specific characteristics, come together alongside a super foam to deliver its specific ride and response. It’s not always possible to parse each element individually.

3. Plates

Not every super trainer has a plate in its midsole, but it’s increasingly common. That’s because—regardless of whether it’s made from TPU, EVA, PEBA, carbon fiber, or a mix—a plate stiffens the midsole and can add support. It may also give the ride some extra pop, but it largely functions to stabilize the shoe. The Adidas Adizero Prime X 2 Strung, which has a heel stack height of 50mm, requires two stiff carbon-infused plates.

Some shoes need less support and utilize pliable materials with thinner rod constructions or forgo full-length plates for ones that extend only halfway along the midsole.

→ How do midsole plates work?

While plates can add propulsion, research suggests that the true hero is the foam itself. A plate mostly serves to “facilitate motion and add stiffness to the sole to balance out the softer compliant foams,” says Matt Klein, DPT and founder of the Doctors of Running website and podcast.

He explains that the effects of stiff-plated shoes are not clear-cut. “Everything we know [about super trainers] is applied from super shoe and maximal shoe research. These shoes shift work up to the knees and hips. The ankles may do less, but that doesn’t always apply. If the shoe is too stiff, the ankles will actually end up doing more work. But once a midsole gets so thick, it may not need a plate; the amount of material naturally stiffens the ride.”

What Are the Benefits of Super Trainers?

Simply put, these shoes are so much fun to run in. They can lend a bounce to your stride that feels like bounding on a trampoline. And since the springy sensation and high energy return can help you move more efficiently, running fast feels easier.

Plus, a review of 63 research studies concluded that these trainers can also help attenuate shock and dampen some of the hard impacts from training. So, runners recover from hard efforts more quickly; they’ll lace up the next day feeling fresher and less sore than if they’d worn regular running shoes. And for those eager to increase mileage, this may allow some runners to increase their weekly workload with less fatigue and fewer aches and pains.

“These have the benefit of having similarities to super racing shoes. These shoe types certainly increase the capacity of work you can do, so I suspect those running higher miles will probably benefit most from these,” Klein speculates.

But, the recovery boost from super trainers can make it tempting to tack on too many miles too soon or overcook the pace on easy days. “Just because you are less sore does not mean you are at a lower risk for injury. You can still get injured with overdoing things,” Klein says.

Our wear-testers report that they’re able to run faster paces with less effort in super trainers, but it’s still important to keep easy jogs relaxed. Double-check your training log and pull back on the reins if you notice spikes in mileage or intensity outside your typical training volume. 

Are There Any Risks to Super Trainers?

Though they feel great, super trainers can have an impact on our natural gaits and biomechanics. “One of the injury risks for this shoe type is that it is so different from normal mechanics and footwear. The current evidence from super shoes and super-max stack-height shoes is that we tend to stiffen our legs in taller, softer shoes,” Klein says. “This is not bad short-term, but some evidence suggests long-term super-max stack-height shoes can actually increase joint loading due to that stiffening.”

“I suspect running in them a ton will cause less joint motion, as the body will stiffen up to find stability as shock absorption isn’t needed. This may be great for a recovery run/faster run, but trying to transition back to normal shoes can take time if you only run in these and super racing shoes.” Klein recommends making the transition slowly to avoid injury and keeping more than one pair of running shoes in your rotation. 

“I do suspect that with the workload being shifted up to the knee and especially the hip, there may be an increase in injuries in those areas. The hip still has to work harder being on a softer, less stable surface. So, those with hip instability and strength issues may want to avoid super shoes, at least until these issues have been addressed,” Klein says. New runners should focus on building strength and experience before experimenting with super trainers.

There is little doubt that these shoes have effects at the point where our feet meet the midsoles as well as farther along our kinetic chains. Super trainers shift more of the workload of running to the hamstrings, which means that you won’t engage the calves and lower leg muscles as much. Moving some of that effort to larger muscle groups can be beneficial for some runners, like those who are struggling with calf or Achilles tendon injuries. But those who have a nagging hamstring strain may need to be wary. Whether or not it’s your goal, those upper leg muscles will receive more of a workout.

At the very least, one thing can be said for sure. It’s that all the foam underfoot is going to put a lot of distance between your foot and the ground. This limits the amount of ground feel you receive from the shoe. It can be easier to wipe out if you’re hopping a curb on a night run. And on rain-slicked sidewalks or technical trails, it can be tough to steer a thick and bulky midsole. If you’re prone to ankle rolls or need a keen sense of where and how your foot is landing whenever you touch down, a super trainer might not serve you well.

Will I Really Get DQ’d in a Race?

It depends. If you’re an elite runner, absolutely. But if you’re going for a 3:10 BQ, it’s unlikely. Ethiopian runner Derara Hurisa won the 2021 Vienna Marathon in 2:09:22 but was disqualified when race organizers found he’d raced in the Adidas Adizero Prime X, a different shoe than he’d declared on his prerace form. Another runner at a fall 2023 half marathon was disqualified after winning in the same shoe. 

Our Favorite Super Trainers

Running shoes aren’t cheap. Maxed-out midsoles with top-end shoe tech only add to the bill. Most super trainers will cost you $180 at least, and there are options to be had for well over $200.

(03/10/2024) Views: 3,687 ⚡AMP
by Runner’s World
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Jakob Ingebrigtsen Eyes Summer Return as London Diamond League Emerges as Potential Comeback Stage

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.

(06/03/2026) Views: 30 ⚡AMP
by Erick Cheruiyot for My Best Runs.
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From Victory to Disqualification: The Bolder Boulder Controversy That Sparked a Running Debate

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.

(06/02/2026) Views: 34 ⚡AMP
by Erick Cheruiyot for My Best Runs.
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Rome Diamond League Set for a Sprint Showdown as Omanyala, Lyles, Tebogo and Jacobs Collide

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.

(06/02/2026) Views: 66 ⚡AMP
by Erick Cheruiyot for My Best Runs.
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Werro Sent a Strong Message to Rivals with Record-Breaking Run in Rabat

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.

(06/02/2026) Views: 78 ⚡AMP
by Erick Cheruiyot for My Best Runs.
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Sharon Lokedi Returns to Boston Seeking Another Triumph at the 2026 B.A.A. 10K

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.

(06/02/2026) Views: 101 ⚡AMP
by Erick Cheruiyot for My Best Runs.
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B.A.A. 10K

B.A.A. 10K

The 6.2-mile course is a scenic tour through Boston's Back Bay. Notable neighborhoods and attractions include the legendary Bull and Finch Pub, after which the television series "Cheers" was developed, the campus of Boston University, and trendy Kenmore Square. ...

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