Robo-trainer takes the field

Robo-trainer takes the field: Apparently, NFL players now have digital clones. They call it “Digital Athlete,” and it watches every sprint, twist and fall to warn when someone’s about to pull a hamstring. It even flashes red if a player’s overworked (paywall link). It’s basically Fitbit meets Minority Report, except the stakes are million-dollar knees instead of your steps goal.