Super shoes : Performance, biomechanics, and injury risk
introduction:
If you’ve lined up for a road race in the last few years, you’ve undoubtedly seen super shoes everywhere. They are generally unmistakable: high stack height, very squishy, flashy colors. But they aren’t just a fashion statement, they have completely changed the game.
But as we’ve discussed in this series, there is no free lunch. Every change in how we apply load to the body comes with a trade-off. Today, we’re untangling how super shoes actually work, how they change your mechanics, and why they might be shifting the weakest link in your kinetic chain.
Where Does the Speed Come From?
The term super shoe entered the lexicon largely due to a seminal study by Hoogkamer et al. (2018), which validated that the original Nike Vaporfly improved running economy by an average of 4% (1).
Performance benefit is a synergy of three components:
PEBA Foam: Unlike traditional EVA foam, Polyether Block Amide (PEBA) is incredibly resilient. It returns roughly 87–90% of the energy you put into it, compared to ~65% in old-school flats
Carbon-Fiber Plate (CFP): This acts as a stabilizer and a lever. It helps the foam compress and expand efficiently while reducing energy loss at the toes.
Rocker Geometry: The aggressive curve helps you "roll" through the gait cycle, reducing the work required by your calves.
Essentially, these shoes act like a high-efficiency battery - they ensure you waste far less of the energy you’re already producing.
Biomechanical Changes:
When you put on a pair of super shoes, your biomechanics shift almost immediately. Drawing from research by Healey & Hoogkamer (2022) and Barnes & Kilding (2019), we see a few consistent changes (2,3):
Rigid lever: The stiff plate and rocker geometry reduce bending forces at the MTP joints.
Ankle Sparing: Because the shoe handles more energy return, there is a reduction in calf muscle fatigue.
Stride Length: Stride length tends to increase without a proportional increase in effort.
Injury Profile:
There needs to be more prospective research and randomized controlled trials. But here is what the research seems to indicate at this point:
Because of the reduction in plantar flexion loads and metatarsal bending forces, it is theorized super shoes reduce injury risk in the foot/ankle. This would reduce things like: shin splints/MTSS, achilles tendinopathy, plantar fascia pain, and bone stress injuries in the foot and lower leg.
However, the most significant injury finding in recent literature came from Tenforde et al. (2023) (4). They published a case series of 5 high level endurance athletes (some elite triathletes, some elite junior track athletes) who developed navicular bone stress injuries shortly after switching to carbon-plated shoes.
Why the Navicular?
The navicular bone sits at the top of your arch. Normally, when you run, your foot flexes and the arch compresses to dissipate force. But as Healey & Hoogkamer showed, the carbon plate locks the foot into a rigid lever. If the toes can't bend, the midfoot (the navicular) becomes the mechanical bottleneck where all that force is concentrated.
The Practical Takeaway
Super shoes are a phenomenal tool for performance.
Respect the Adaptation: Your muscles (calves) might feel great, but your bones (navicular) take longer to adapt to the new mechanical lever.
Periodize Your Footwear: Mix up your footwear during your training cycle. I think of wearing different shoes during training as a form of injury prevention. Save the super shoes for key workouts and races and introduce them gradually to give the navicular and other tissues time to adapt.
Monitor Your "Maps": If you have a history of midfoot pain, be extremely cautious. The performance gain is real, but as Tenforde showed, the cost of a navicular stress fracture is months of total non-weight bearing.
Are you currently rotating your shoes, or have you made the full switch to plates? Let me know in the comments.
References:
Hoogkamer, W., et al. (2018). A Comparison of the Energetic Cost of Running in Marathon Racing Shoes. Sports Medicine.
Healey, L. A., & Hoogkamer, W. (2022). Longitudinal bending stiffness does not affect running economy in Nike Vaporfly Shoes. Journal of Sport and Health Science.
Barnes, K. R., & Kilding, A. E. (2019). A Randomized Crossover Study Investigating the Running Economy of Highly-Trained Male and Female Distance Runners in Nike Vaporfly 4%. Sports Medicine.
Tenforde, A. S., et al. (2023). Bone Stress Injuries of the Foot Associated with Use of Carbon-Fiber Plate Running Shoes: A Case Series. Sports Medicine.
