[biltong]

I believe it should be something like this:

pawn Код:

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
   if(newkeys & 8) && !(oldkeys & 8)
   {
      printf("%s pressed the sprint key"); //assuming the shift key is your sprint key
      return 1;
   }
   return 1;
}

But I haven't tested it.