Do Supershoes Actually Work for Everyday Runners?Here Is What the Research Says.
Carbon-plated running shoes, often called supershoes or advanced footwear technology (AFT), have reshaped competitive distance running since their mainstream debut in 2017. World records have fallen at every distance from 5K to the marathon. The shoes are now worn by recreational runners at weekend 5Ks and local half marathons. The marketing is loud. The price tags are high. And the question most everyday runners are actually asking is a practical one: is any of this relevant to me?
The honest answer, until recently, was mostly no. The bulk of research establishing the metabolic benefits of supershoes had been conducted on well-trained and elite runners moving at paces most recreational runners will never hit in a race. The reasonable concern was that the technology might be specifically tuned to high-speed biomechanics, and that at the slower paces real people actually run, the benefit might fade to something not worth the investment.
New research changes that calculus, but not entirely in the way the marketing would suggest. A 2026 randomized crossover trial tested recreational runners at genuinely slow paces and found that the metabolic savings held up across every speed tested. At the same time, a growing body of literature is filling in the rest of the picture: how long the benefit actually lasts, what happens to your body with heavy use, and why the shoe you like the most might not be the one that optimizes your oxygen cost. This post covers all of it.
The goal here is not to tell you whether to buy a supershoe. It is to give you enough of the real picture to make that decision for yourself.
What Makes a Supershoe a Supershoe
The term supershoe is informal. The scientific category is Advanced Footwear Technology, or AFT. Three specific design features define it, and the research is increasingly clear that all three working together is what drives the benefit.
1. PEBA Foam
Traditional running shoe midsoles are made from ethylene-vinyl acetate (EVA), a foam that returns roughly 65 percent of the energy put into it with each footstrike. In 2017, Nike introduced a supercritical foam made from polyether block amide (PEBA) in the Vaporfly 4%, returning approximately 85 to 87 percent of energy back to the runner. That difference in energy return is substantial when multiplied across thousands of footstrikes per mile. PEBA is also lighter than EVA at comparable cushioning volumes, which matters because added shoe mass directly increases metabolic cost: research consistently estimates that each 100 grams of additional shoe mass increases oxygen consumption by roughly one percent.
PEBA foam does have a durability limitation. A 2023 study by Rodrigo-Carranza and colleagues found that the running economy advantage of PEBA over EVA effectively disappears after approximately 450 kilometers of use. At that point, worn PEBA shoes and worn EVA shoes produce similar metabolic costs. A fresh supershoe is a different tool than a 500-mile supershoe. This is relevant to any runner using a single pair for both training and racing.
2. Carbon Fiber Plate
Embedded within the midsole foam is a full-length, curved carbon fiber plate that increases longitudinal bending stiffness. The plate serves two mechanical purposes. First, it resists toe bend at the metatarsophalangeal joint during propulsion, reducing the amount of muscular work required at that joint. Second, the curved rocker geometry shifts ground reaction forces forward during push-off in a way that reduces demand on the ankle plantarflexors, effectively offloading work from the calf and Achilles complex. Biomechanics researcher Benno Nigg has described this as the "teeter-totter effect."
What remains genuinely debated in the literature is the relative contribution of the plate versus the foam. Some studies suggest the foam accounts for the majority of the running economy benefit, with the plate contributing less than one percent independently. Others find the combination produces effects larger than either component alone. A 2025 study by Perry and colleagues specifically isolating the contributions of foam type and plate presence found that both independently improved running economy, with the combined effect being additive. The honest position is that the mechanism is still being worked out, and the full benefit appears to require the whole package.
3. Low Mass
True AFT shoes are notably light. The On Cloudboom Echo 3 used in the 2026 Bolliger study weighed 215 grams. A traditional entry-level running shoe typically weighs 270 to 310 grams. That difference alone accounts for a meaningful portion of the running economy gap between shoe categories. This is not a trivial design detail. It is also why prototype shoes that add energy-return features but sacrifice the weight advantage may not deliver the expected metabolic benefit, as the 2026 study directly demonstrated.
All three elements together appear to drive the benefit. PEBA foam alone is not enough. A stiff plate in a heavy shoe is not enough. The full package of low mass, high-resilience foam, and longitudinal stiffness is what the evidence supports.
What the Research Actually Shows
The Original Evidence Base: Elite Runners, Fast Paces
The foundational research establishing the metabolic benefit of AFT shoes was conducted primarily on well-trained and elite runners at speeds of 13 to 18 kilometers per hour, roughly a 5:30 to 7:30 per mile pace. Across multiple studies and a 2025 systematic review and meta-analysis covering 17 randomized crossover trials, the consistent finding was a 2.7 to 4.2 percent improvement in running economy compared to traditional shoes. That translates to roughly a one to two percent performance improvement in race conditions, which at the elite level is the difference between winning and finishing off the podium.
Importantly, this research was almost entirely conducted on runners who were already moving at paces far beyond what most recreational runners ever train or race at. The question of whether those findings applied to someone running a 10 or 11-minute mile was, until recently, largely unanswered.
The 2026 Bolliger Study: The Slow-Speed Question Gets an Answer
A 2026 randomized, crossover trial published in Sports Medicine Open by Bolliger and colleagues at ETH Zurich is the most methodologically rigorous study to date examining supershoe benefits at recreational running paces. Fourteen moderately trained runners (6 men, 8 women, average VO2peak of 49.8 ml/kg/min) completed three sessions of treadmill running at four speeds: 7.5, 9.0, 10.5, and 12.0 km/h. In miles per minute terms, those correspond to roughly a 12:50, 10:45, 9:10, and 8:00 pace per mile. Each session used a different shoe: a traditional entry-level trainer (On Cloudrunner 2), a full AFT shoe (On Cloudboom Echo 3), and a prototype shoe combining a nylon plate with dual-density foam but without the weight advantage of the AFT model.
The primary finding was that the full AFT shoe improved running economy by approximately 2.5 percent compared to the traditional shoe, and this benefit was statistically consistent across all four speeds tested. There was no meaningful speed-dependent drop-off. The metabolic savings showed up at 7.5 km/h just as clearly as at 12.0 km/h. Heart rate was also meaningfully lower in the AFT condition at all speeds. This directly contradicts two prior studies that had suggested the benefit diminishes or disappears at slower paces. The authors note that those earlier studies used single or dual measurement trials per condition, which produces higher variability. The Bolliger study used three sessions per condition and averaged results, substantially reducing noise and increasing confidence in the effects.
The prototype shoe found no meaningful improvement in running economy over the traditional shoe, despite its more complex construction and higher price point. The prototype was 97 grams heavier than the AFT shoe, and the authors calculated that mass difference alone could account for nearly the entire observed economy gap between the two shoes. Better foam and a plate do not overcome a significant weight penalty.
The Comfort Finding
The most underreported result from the 2026 study is what drove shoe preference. After three testing sessions, participants ranked their favorite shoe. The preferred shoe had both better running economy and better comfort ratings than the least-preferred shoe. However, the effect size for comfort was considerably larger than the effect size for running economy. When participants chose a shoe, they were primarily choosing what felt good, not what optimized their oxygen cost. This finding held even after they had direct experience with all three shoes and had some familiarity with each.
This is not a knock on runners. It is a coherent response to a multidimensional experience. Comfort during running has real downstream effects on form, compliance with training, and potentially injury risk. The research does not support dismissing comfort as merely subjective. It is a legitimate variable. The implication for shoe selection is that a shoe sitting at the intersection of genuine AFT design and good perceived fit is probably a better choice than a maximally stiff, metabolically optimized model that feels awkward underfoot.
Non-Responders
The average tells part of the story. Individual responses to supershoes vary more than the headlines suggest. In the Bolliger study, running economy improved by 2.5 percent on average, but confidence intervals were meaningful and individual trajectories diverged. In other footwear research, some runners show no benefit or even a slight cost with AFT shoes. This variability is not well understood. Running form, foot mechanics, habitual shoe type, and individual biomechanical profiles likely all play a role. The practical takeaway is that if you try a supershoe and it does not feel fast, or your runs feel harder rather than easier, you may be in the non-responder range. The average finding does not guarantee an individual outcome.
The Injury Picture: What We Know and What We Do Not
The injury question around supershoes is the most clinically important and the least resolved. Here is an honest accounting of the current state of knowledge.
What Changes Biomechanically
AFT shoes reduce demand at the ankle and metatarsophalangeal joint during propulsion. This is the primary mechanism of the metabolic benefit: less muscular work required at the foot and calf complex means less oxygen consumed per kilometer. The tradeoff, from a tissue loading standpoint, is that forces do not disappear. They shift. Research using pressure analysis and joint moment calculations has found that while the calf and forefoot complex do less work, vertical ground reaction forces per step may increase slightly and forces are redistributed elsewhere.
A 2024 study found that stiffer carbon-plated shoes altered ankle motion in ways previously associated with navicular stress fractures. A separate 2024 analysis noted reduced work at the metatarsophalangeal joint, which raised questions about potential weakening of the intrinsic foot musculature and plantar fascia with prolonged high-mileage use in these shoes. The relationship between these biomechanical changes and actual injury rates in recreational populations has not been established in controlled prospective research.
The Navicular Concern
A 2023 case series published in Sports Medicine by Tenforde and colleagues described five elite and sub-elite runners who developed navicular bone stress injuries while using carbon fiber plate footwear. The proposed mechanism involves the fulcrum point of the plate creating a bending moment across the midfoot that concentrates stress on the navicular with each footstrike. All five athletes had been using AFT footwear in training. The authors were careful to call this a case series, not an epidemiological finding, and explicitly noted that this level of evidence cannot establish causation. A case series of five injured runners does not tell us the rate of navicular stress injuries among all runners using these shoes.
What the case series does establish is that the injury is plausible from a mechanical standpoint, that clinicians should include footwear history in their workup for midfoot pain in runners, and that gradual transition into AFT footwear is prudent, paralleling the evidence-based guidance for minimalist shoe adoption. The comparison to minimalist shoes is apt: rapid adoption of a shoe type that substantially changes load distribution has historically preceded upticks in specific injury patterns, regardless of whether the shoe is maximally minimal or maximally cushioned.
The Tibial Loading Finding
A 2024 study by Werkhausen and colleagues found that AFT shoes reduced both oxygen cost and cumulative tibial loading per kilometer in recreational runners. This is a potentially important counterpoint to the injury narrative. If these shoes reduce the impact force accumulated per kilometer, they may actually be protective against tibial stress injury in runners who are already accumulating high mileage. The research is early and the population studied was recreational, not high-mileage elite. But it adds nuance to a picture that is sometimes painted as uniformly concerning.
The current evidence does not support the position that supershoes are dangerous for recreational runners. Nor does it support the position that they are injury-neutral. The honest answer is that we do not have good prospective epidemiological data. Transition gradually, monitor for midfoot or anterior ankle pain, and treat any persistent pain as worth evaluating.
How to Think About Supershoes as a Training Tool
Race Day vs. Daily Training
The distinction between a race shoe and a training shoe is not arbitrary marketing. It reflects a genuine difference in how the shoe is designed and how the benefit accrues. The metabolic economy of PEBA foam degrades after approximately 450 kilometers of cumulative use, at which point its advantage over EVA-based trainers is largely erased. If you train 50 kilometers per week in your supershoes, you are looking at roughly nine weeks before the foam begins losing meaningful responsiveness. Using a supershoe for your easy runs and recovery miles is not getting more out of the technology. It is burning through a limited lifespan.
The practical approach most supported by the evidence is to reserve genuine AFT shoes for race day and for quality workouts where running economy matters, and to train primarily in durable daily trainers. Some runners opt for a mid-tier option (a carbon-plated shoe with EVA or TPU foam rather than PEBA) for tempo and threshold work, accepting a smaller economy benefit in exchange for more durability and a lower replacement cost.
Who Benefits Most
The 2026 Bolliger data suggests recreational runners do benefit, and the benefit is not trivially small at a 2.5 percent improvement in running economy. For a runner finishing a half marathon in two hours, a 2.5 percent improvement in economy, assuming it translates proportionally to performance, could represent two to three minutes off a race result. That is not nothing.
That said, the highest return on investment from a supershoe goes to runners who are already training consistently, are not limited by aerobic fitness or musculoskeletal capacity, and are preparing for a goal race where time matters. A runner who is still building base mileage, managing recurring injury, or running on inconsistent weekly volume will see a larger return from addressing those limiting factors than from footwear technology. The shoe reduces the cost of covering a given pace. It does not build the engine.
Transition Guidance
If you have been running in traditional trainers and are adopting an AFT shoe, treat the transition as you would any meaningful change in training load or equipment. The biomechanical demands on the foot and ankle are different. Start by using the shoes for shorter, lower-volume sessions. Do not immediately race or complete a long run in a brand-new pair on the same day you receive them. Give yourself at least two to four weeks of progressive exposure at moderate volumes before using them for a goal race. Any anterior ankle, midfoot, or navicular-area pain that develops should be evaluated rather than trained through.
Comfort Is a Real Selection Criterion
The Bolliger study's finding that comfort drove shoe preference more strongly than running economy should shape how you approach the shoe selection process. A shoe that feels awkward, constricting, or unstable is unlikely to produce the expected benefit regardless of its specifications. Different AFT models vary meaningfully in fit, geometry, and feel. The research does not support one brand over another. It supports the combination of genuine AFT design features and a fit that works for your foot.
The ZPO Perspective
We find the supershoe evidence genuinely interesting, and the 2026 Bolliger study is the best data to date on a question that directly affects the recreational runners we work with. The finding that metabolic savings hold up at easy and moderate paces, independent of speed, is clinically meaningful. It changes the conversation from one where supershoes were primarily an elite tool to one where they are legitimately relevant for a broader range of runners.
But the framing matters. Supershoes reduce the oxygen cost of covering a given distance at a given pace. They do not improve VO2max. They do not build strength, power, or resilience in the muscles and tendons that make running sustainable across a training year. They do not address the capacity side of the equation, which is where the long-term work lives. A 2.5 percent improvement in running economy is real. It is also smaller than the improvement available from a consistent six-month training block in a runner who has been undertrained.
We are also attentive to what the injury picture does and does not tell us. The navicular concern is mechanically plausible and worth monitoring clinically. It is not established as a widespread risk for recreational runners. Gradual adoption, attention to midfoot and ankle symptoms, and not treating a race shoe as an everyday trainer are all reasonable precautions that cost nothing.
The principle we return to most often applies here: capacity must exceed demand. Supershoes reduce demand slightly. Building capacity remains the primary strategy. Used intelligently as part of a well-designed training approach, they are a reasonable tool. They are not a shortcut, and they are not the most important variable in your performance.
If you have questions about how footwear fits into your specific training or injury history, that is exactly the kind of conversation we have every day at ZPO. Bring your shoes.
Research Referenced in This Article
Bolliger A, Spengler CM, Beltrami FG. Impact of Advanced Footwear Technology on Running Economy at Slower Running Speeds: A Randomised, Cross-Over Investigation. Sports Medicine Open. 2026;12:12. https://doi.org/10.1186/s40798-026-00977-3
Hoogkamer W, Kipp S, Frank JH, et al. A comparison of the energetic cost of running in marathon racing shoes. Sports Medicine. 2018;48:1009–1019.
Rodrigo-Carranza V, Hoogkamer W, González-Ravé JM, et al. Influence of different midsole foam in advanced footwear technology use on running economy and biomechanics in trained runners. Scandinavian Journal of Medicine & Science in Sports. 2024.
Tenforde AS, Hoenig T, Saxena A, Hollander K. Bone stress injuries in runners using carbon fiber plate footwear. Sports Medicine. 2023. https://doi.org/10.1007/s40279-023-01818-z
Werkhausen A, et al. Technologically advanced running shoes reduce oxygen cost and cumulative tibial loading per kilometer in recreational female and male runners. Scientific Reports. 2024. https://doi.org/10.1038/s41598-024-62263-0
Perry D, Lino H, Bertschy M, Hoogkamer W. Effects of longitudinal bending stiffness and midsole foam on running energetics. Footwear Science. 2025;17(1):3–9.
Rodrigo-Carranza V, González-Mohíno F, Santos-Concejero J, González-Ravé JM. The effects of footwear midsole longitudinal bending stiffness on running economy and ground contact biomechanics: a systematic review and meta-analysis. European Journal of Sport Science. 2022;22(10):1508–1521.
Van Alsenoy K, et al. Increased footwear comfort is associated with improved running economy: a systematic review and meta-analysis. European Journal of Sport Science. 2023;23(1):121–133.