922924 Brian Rice, «Sleeping to Better Performance,» UTSports, August 16, 2015, http://www.utsports.com.
923925 Clegg, «College Football Wakes Up to a New Statistic.»
924926 Leon Sasson (founder, Rise Science), email to the author, November 7, 2015.
925927 Clegg, «College Football Wakes Up to a New Statistic.»
926928 Christopher Winter, William R. Hammond, Noah H. Green, Zhiyong Zhang, and Donald L. Bliwise, «Measuring Circadian Advantage in Major League Baseball: A 10–Year Retrospective Study,» International Journal of Sports Physiology & Performance 4 (2009): 394–401.
927929 Winter, email to the author.
928930 Jason Koebler, «Study: MLB Players' Plate Discipline Degrades Over Season,» USA TODAY, May 31, 2013, http://www.usatoday.com.
929931 Janie Mc-Cauley, «Sweet Dreams: Sleep Expert Helps Giants in October,» USA TODAY, October, 25, 2014, http://www.usatoday.com.
930932 Sue Shellenbarger, «The Peak Time for Everything,» The Wall Street Journal, September 26, 2012, http://www.wsj.com.
931933 McCauley, «Sweet Dreams.»
932934 Mark McClusky, Faster, Higher, Stronger: How Sports Science Is Creating a New Generation of Superathletes – and What We Can Learn from Them (New York: Penguin, 2014), Kindle edition.
933935 Dan Hughes, «Seattle Mariners Use Technology and Stuff to Fight Travel Fatigue,» SODO MOJO, November 3, 2014, http://www.sodomojo.com.
934936 «What Impact Is a Lack of Sleep Having on Your Athletes' Performance?» Fatigue Science, http://www.fatiguescience.com.
935937 Elise Facer-Childs and Roland Brandstaetter, «The Impact of Circadian Phenotype and Time Since Awakening on Diurnal Performance in Athletes,» Current Biology 25 (2015), 518–22.
936938 James Gallagher, "Bedtime 'Has Huge Impact on Sport', " BBC News, January 30, 2015, http://www.bbc.com.