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Justin Thomas' sleep stats go some way in helping us understand his winning week at US PGA.
Rory McIlroy's heart rate jumped considerably before he played his memorable bunker shot at the 18th hole at The Masters on Sunday.
Justin Thomas, Rory McIlroy and Nelly Korda use fitness trackers such as WHOOP, but does the game offer a complete workout?
Rory McIlroy's heart rate reached whopping heights after he had sealed the win at the Wells Fargo Championship.
Many of the best players on the PGA Tour wear a WHOOP strap, but World No.1 Dustin Johnson has decided to stop and here's why...