The downsides include instability, strain on the calves and Achilles, reduced ground feel, and limited durability. Injuries like Achilles tendonitis, calf strain, and stress fractures have been reported, especially if runners don’t transition gradually into using the shoes.
Reported Injuries:
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Some runners have reported Achilles tendonitis, calf strain, and plantar fasciitis after using the Vaporfly 3, mainly if they were not accustomed to the carbon plate design.
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Stress fractures have also been noted among runners who may have pushed too hard, as the enhanced energy return can lead to overtraining or masking signs of fatigue.
In summary, while the Nike Vaporfly 3 can enhance performance, runners need to transition gradually into the shoe, pay attention to their form, and monitor any unusual discomfort, especially in the calves, Achilles, and feet. These shoes might not be suitable for all runners, particularly those with a history of injuries or needing more stability or support.
Be cautious when trying new shoes.