Data logging in games is allowed to assess player safety. Many schools do it and it's really cool. You know the exact mileage people have run in a given game. Tennessee tailback Jaylen Hurd ran 9 miles between warmup and gametime one of their games. That number includes going up and down the sidelines and running into formation etc, but that information is important to someone in a S&C role. If you're only having someone who typically runs 9 miles at gametime run 5 miles, you aren't working him out.