Pawlikowska T, Chalder T, Hirsch SR, Wallace P, Wright DJ, Wessely SC. Population based study of fatigue and psychological distress. BMJ. 1994;308(6931):763-6.
 Murphy SL, Kratz AL, Schepens Niemiec SL. Assessing Fatigability in the Lab and in Daily Life in Older Adults With Osteoarthritis Using Perceived, Performance, and Ecological Measures. J Gerontol A Biol Sci Med Sci. pii: glw173 2016.
 Eldadah BA. Fatigue and fatigability in older adults. PM R. 2010;2(5):406-13.
 Kim I, Hacker E, Ferrans CE, Horswill C, Park C, Kapella M. Evaluation of fatigability measurement: Integrative review. Geriatr Nurs. 2018:10.1016/j.gerinurse.2017.05.014.
 Dhruva A, Aouizerat BE, Cooper B, Paul SM, Dodd M, et al. Differences in morning and evening fatigue in oncology patients and their family caregivers. Eur J Oncol Nurs. 2013;17(6):841-8.
 Brodman K, Erdmann AJ Jr. The Cornell medical index; a adjunct to medical interview. J Am Med Assoc. 1949;140:530–4.
 Sawada T, Konomi A, Yokoi K. Iron deficiency without anemia is associated with anger and fatigue in young Japanese women. Biol Trace Elem Res. 2014;159(1-3):22-31.
 Santanasto AJ, Glynn NW, Jubrias SA, Conley KE, Boudreau RM, et al. Skeletal Muscle Mitochondrial Function and Fatigability in Older Adults. J Gerontol A Biol Sci Med Sci. 2015;70(11):1379-85.
 Yoon T, Doyel R, Widule C, Hunter SK. Sex differences with aging in the fatigability of dynamic contractions. Exp Gerontol. 2016:10.1016/j.exger.2015.07.001.
 Task Force of the European Society of Cardiology and the North American Society of Pacing and Electrophysiology. Heart rate variability: standards of measurement, physiological interpretation, and clinical use. Eur Heart J. 1996;93:1043–1065.
 Klieger, RE, Bigger JT, Bosner, MS. Stability over time of variables measuring heart rate variability in normal subjects. Am J Cardiol 1992;68:626-30.
 Sisto SA, Tapp WN, LaManca JJ, Ling W, Korn LR, et al. Physical activity before and after exercise in women with chronic fatigue syndrome. QJM. 1998;91(7):465-73.
 Taniguchi K, Shimouchi A, Seki J, Jinno N, Shirai M, et al. Factors affecting coordination between heart rate variability and physical acceleration in daily lives of free-moving adults. Adv Biomed Eng. 2015;4:35-41.
 Aoyagi Y, Shephard RJ. Sex differences in relationships between habitual physical activity and health in the elderly: practical implications for epidemiologists based on pedometer/accelerometer data from the Nakanojo Study, Arch. Gerontol. Geriatr. 2013;56(2):327-38.
 Koenig J, Thayer JF. Sex differences in healthy human heart rate variability: A meta-analysis, Neurosci. Biobehav. Rev. 2016;64:288-310.
 Hunter SK. Sex differences in human fatigability: mechanisms and insight to physiological responses. Acta Physiologica. 2014;210(4):768–89.
 Esperer HD, Esperer C, Cohen RJ. Cardiac Arrhythmias Imprint Specific Signatures on Lorenz Plots. Ann Noninvasive Electrocardiol 2008;13(1):44-60.
 Taniguchi K, Shimouchi A, Jinno N, Okumura N, Seiyama A. Parasympathetic nervous activity associated with discoordination between physical acceleration and heart rate variability in patients with sleep apnea. Adv Exp Med Biol. 2020:1269
 Pendleton N, Clague JE, Horan MA, Rabbitt PM, Jones M, et al. Concordance of Cornell medical index self-reports to structured clinical assessment for the identification of physical health status. Arch Gerontol Geriatr. 2004;38(3):261-9.
 Kanehira T, Fukamachi K, Nozoe S. Japanese-style Cornell Medical Index health questionnaire Kyoto: Sankyobou in Japanese 2001.
 Iwashita S, Takeno Y, Okazaki K, Itoh J, Kamijo Y, et al. Triaxial accelerometry to evaluate walking efficiency in older subjects. Med Sci Sports Exerc. 2003;35(10):1766–72.
 Tanaka C, Tanaka S, Kawahara J, Midorikawa T. Triaxial accelerometry for assessment of physical activity in young children. Obesity. 2007;15(5):1233–41.
 Xhyheri B, Manfrini O, Mazzolini M, Pizzi C, Bugiardini R. Heart Rate Variability Today. Progress in Cardiovascular Diseases 2012;55:321–31.
 Christie AD, Snook EM, Kent JA. Physical activity, sleep quality, and self-reported fatigue across the adult lifespan. Exp Gerontol. 2016;77:7-11.
 King AC, Pruitt LA, Woo S, Castro CM, Ahn DK, et al. Effects of moderate-intensity exercise on polysomnographic and subjective sleep quality in older adults with mild to moderate sleep complaints. J Gerontol A Biol Sci Med Sci. 2008;63(9):997-1004.
 Meeusen R, Duclos M, Foster C, Fry A, Gleeson M, et al. Prevention, diagnosis, and treatment of the overtraining syndrome: joint consensus statement of the European College of Sport Science and the American College of Sports Medicine. Med Sci Sports Exerc 2013;45:186–205.
 Dhruva A, Aouizerat BE, Cooper B, Paul SM, Dodd M, et al. Cytokine gene associations with self-report ratings of morning and evening fatigue in oncology patients and their family caregivers. Biol Res Nurs. 2015;17(2):175-184.
 Leavitt VM, DeLuca J. Central fatigue: issues related to cognition, mood and behavior, and psychiatric diagnoses. PM R. 2010;2(5):332-337.