Validity of simplified, calibration-less exercise intensity measurement using resting heart rate during sleep: a method-comparison study with respiratory gas analysis.
Hirotaka MatsuuraMasahiko MukainoYohei OtakaHitoshi KagayaYasushi AoshimaTakuya SuzukiAyaka InukaiEmi HattoriTakayuki OgasawaraEiichi SaitohPublished in: BMC sports science, medicine & rehabilitation (2019)
UMIN000034967.Registered 21 November 2018 (retrospectively registered).