New Adidas Adizero Adios Pro Evo 3 marathon shoes use low-mass foam, a carbon plate, and forefoot-focused design to improve energy return—part of why elite runners keep getting faster.
A new pair of marathon shoes can turn a race into a science experiment—and this year’s London Marathon finish helped underline that point.
When three elite runners in London each surged with record-level performances. their shared detail caught the attention of scientists as much as fans: they all wore Adidas’ Adizero Adios Pro Evo 3.. Sabastian Sawe won the men’s race in 1:59:30. Yomif Kejelcha followed in 1:59:41. and Tigist Assefa set a women’s record with 2:15:41.. The shoes weren’t just “race-day footwear” in the usual sense.. They are a highly engineered attempt to change how the body uses energy across a 42.195-kilometer effort.
What makes the Adizero Adios Pro Evo 3 different
The shoe’s look already hints at its purpose: it’s designed around a thick. foam-filled sole that wraps a curved carbon plate. creating a rocker-like profile.. That geometry isn’t cosmetic.. Misryoum reports that researchers describe the design as an economy-focused system—reducing wasted motion while shaping how a runner’s stride interacts with the ground.
A key part of the strategy is keeping the shoe light without sacrificing cushioning.. The outsole and midsole use ultralightweight foam. aiming to lower mass while still providing comfort and protection for long stretches of impact.. The carbon plate then serves another role: it’s intended to help place the runner in a more forward-tilted posture through the push-off phase.
Carbon plates, forefoot loading, and energy return
To understand why the design matters, it helps to look at how marathon running differs from everyday walking.. In Misryoum’s framing of the underlying biomechanics. a marathon stride is built for repeated. efficient propulsion—not casual foot placement.. The Adizero model is engineered under an expectation: elite marathoners spend much of their time loading the forefoot rather than striking fully on the heel.
That forefoot emphasis links directly to energy efficiency.. When the heel compresses and the body generates backward momentum at contact. the runner can lose some of the energy that would otherwise help drive forward.. By contrast. a gait that primarily uses the front of the foot is often more efficient because it reduces that kind of counterproductive loading.
The carbon plate plus foam arrangement then adds what researchers describe as “springlike capability.” On each step. the shoe stores elastic energy and recoils. pushing the runner upward again as the stride transitions into the next contact.. It’s a partnership between materials science and human motion: the runner still does the work. but the shoe helps manage forces and timing so the leg can reuse energy more effectively.
Misryoum notes that researchers estimate recent generations of marathon shoes can reduce energy expenditure per stride by several percentage points.. Even if the change is small on paper. marathon pacing magnifies the effect—because thousands of steps turn “fractions” into meaningful seconds at the finish.
The competition behind the technology
Marathon performance has been improving for decades, long before today’s carbon-plate models arrived.. Misryoum points out that times have steadily dropped since the distance was formalized in 1921.. Early major gains came as training methods matured.. By the mid-20th century. winning times were already trending closer to the two-hour range. and athletes continued to shave minutes and seconds thereafter.
So where do shoes fit?. The answer is complicated.. Better training. nutrition science. and athlete selection all play roles. and it’s extremely difficult—almost impossible—to cleanly separate a shoe’s effect from all the other variables in elite running.. Misryoum emphasizes the general consensus from researchers: when you try to explain why one runner is faster than another across an entire marathon. the causes are layered and the measurement problem is nearly intractable.
Yet the direction is clear.. Studies repeatedly find that these shoes help runners go faster. largely by improving energy efficiency and mechanical behavior during stance and push-off.. Misryoum also highlights how this “technology-assisted” performance shift differs from earlier eras where footwear may have provided comfort and protection. but not a measurable energy-return advantage at scale.
Why elites keep pushing the two-hour barrier
Breaking the two-hour mark doesn’t just represent speed—it changes expectations.. Misryoum reports that researchers believe there’s still room beyond the current frontier. with technology and training continuing to evolve together.. That means future improvements may come from incremental refinements: better materials. smarter geometry. and more precise tuning for how top runners actually move under race conditions.
From a practical standpoint, this also changes the competitive landscape for organizers and athletes.. If marginal gains can add up across a full marathon. the race becomes partly about biomechanics optimization as much as endurance.. It can also reshape how runners and coaches think about technique—because if a shoe nudges loading toward the forefoot. then the fit between footwear design and an athlete’s natural form becomes even more important.
The lab-to-race pipeline—and the human cost of chasing gains
Adidas describes the Adizero Adios Pro Evo 3 as the result of extensive iteration and testing—working with athletes and evaluating performance in settings ranging from product labs to high-altitude training environments.. Misryoum’s take on that process is straightforward: when products are designed for elite competition. the smallest details—down to tiny weight differences and stiffness tuning—can influence outcomes.
There’s also an emotional and human side to this research arms race.. For runners, faster shoes can feel like liberation—tools that turn training into results.. For the industry, each record forces a new round of innovation.. And for the sport as a whole, the question becomes where the line is between athletic achievement and engineering advantage.
Misryoum’s editorial lens is that the two-hour barrier is no longer just a physical challenge; it’s a test of systems—training. recovery. technique. and now footwear technology acting like an additional “muscle” in the stride.. The elite field will keep refining those systems. and the rest of the sport will feel the ripple effect. one incremental update at a time.