Ponikvar continued his education by obtaining his master 's degree in Psychology before getting a doctorate in dental surgery .
Prone to injury , Ponikvar retired from track and field at the age of 22 , one year before his senior season at Stanford University .
Ponikvar continued Ponikvar 's education by obtaining his master 's degree in Psychology before getting a doctorate in dental surgery .
Prone to injury , Ponikvar retired from track and field at the age of 22 , one year before his senior season at Stanford University .