Doctors of Running Podcast #251 Mailbag! Can a Foam Cause Pain? The Shelf Life of Shoes? The Science Behind Shoe Rotations?
Jul 16, 2025
Discover how different foam materials can influence injury patterns and pain during runs. Learn about the proper shelf life of shoes and why rotating them can enhance your performance. The hosts share insights on adapting to super shoes, even if you haven't run in them much. They also offer tips on selecting the right footwear for ultramarathons and helping retail customers find their perfect fit. Get ready for a deep dive into the science of running shoes and training strategies!
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Foam Softness and Pain Complexities
- Softness perception varies greatly due to foam type and personal biomechanics.
- Plantar fasciitis pain may relate more to midsole stiffness, geometry, and foam reaction than just softness.
Beware Shoe Shelf Life Limits
- Shoe foams degrade over years, losing cushioning and structural integrity.
- Avoid buying running shoes that have been stored for more than 3-4 years to ensure performance.
Ultra Trail Shoe Selection Tips
- Prioritize comfort and stability on technical ultra races over foam softness or stack height.
- Choose shoes that fit your foot mechanics and terrain needs, regardless of high or low stack.