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A bruised toe nail, otherwise known as a black toenail, can be a problem for runners of all distances.
Black or lost toenails can happen during long distance events like marathons or ultramarathons due to the repeated force on your toes for an extended period of time. It can also happen when your running shoes are too small.
While your running shoes may not feel too small when you try them on, extra room is recommended to accommodate slight foot swelling or toe splay–when the toes spread as you push off of the forefoot. This is why you want approximately an extra thumb nail’s length in your shoe. Shoe nowadays are also engineered with responsive materials to accommodate toe splay specifically.
With the extra toe space, you’ll want to find a pair that still fits the heel snugly, as well as a nice mid-foot wrap around the arch area. The key fit in these other areas are truly…
