Originally Posted by KareFree
I saw this on Oprah one day when Shaun (Puffy) Combs was on her show before or after (I can't remember which) doing a run for charity. One of the other runners said that it was a common thing among runners for their toe and toenails to be injured this way. They also said that with the repeated injury the nail would eventually cease to grow. I don't know if that is true or not but it was what I understood from the show.
They will only cease to grow if the matirix of the nail is completely removed. the nail plate will grow in disfigured if the matrix is severely damaged. the nail plate cells are 'born' in the matrix; the leading edge of the matrix can be seen as the white half-moon (Lunula) at the base of the nail plate. The matrix of the toenails is thicker and shorter than the matrix of the fingernails. This is why our toenails are thicker, because there are more layers to the matrix so it can produce more layers of cells.
If you wear proper fitting shoes that cushion the toenails, cushioned socks, and run in a proer fashion (that is 'heals' to the ground first), then you can prevent the majority of this type of injury. Be sure there is plentyoof room in the toe of the shoe to allow for your feet to swell due to the heat of running and sweat.
Take care of your feet - you only get one pair