Over the offseason, NASCAR allowed drivers the opportunity to wear biometric devices on them during the course of an event. Data from these devices has to be stored within the device. The device must be on the approved list provided b the sanctioning body.
Over the course of Daytona Speedweeks, numerous drivers took to social media to showcase what their bodies go through during the course of an event.
Dale Earnhardt Jr., Jamie McMurray, and Kyle Larson are just some of the drivers that went to Twitter to showcase their heart rate.
Comparing heart rate monitoring with two different devices during the same run in the first practice today. pic.twitter.com/PPd9wDPKR9— Dale Earnhardt Jr. (@DaleJr) February 24, 2017
That 10 lap shootout spiked the adrenaline a bit I'd say. ???? pic.twitter.com/pGIpb52c0P— Dale Earnhardt Jr. (@DaleJr) February 24, 2017
HR from the Duel tonight. Almost exactly the same as in the Clash on Sunday. pic.twitter.com/j2e9Nl3ZHH— Jamie McMurray (@jamiemcmurray) February 24, 2017