Quietly flying under the radar in the fitness wearable market is Whoop,
a manufacturer of high-end wrist-worn straps that measure data 100 times per second.

The players who decide to participate in the program will own all of the health data that Whoop collects and the NFLPA sees this as another magnetizable part of the game.

For Whoop, the NFL deal means that they have the highest of high-profile partners to offer endorsements but they’ll also be collecting fitness data from people who push their bodies to the extreme.