This will help the coaches train the athletes independently based on each player’s health and stats and create a better training plan. It will also help mid-game for coaches to make important decisions such as who should be subbed in or is close to getting injured (there’s only a limited number of times a player can take some huge hits without getting seriously hurt).
This would be perfect for the NFL and the NHL since both sports have their players taking a beating during the game and will help keep the players safe. These stats can also be televised during the game to give the audience an inside look at what the players go through during a game. As of right now, this is only in the development stage, but does look like something that will be introduced into professional sports in the near future.