Military service is a demanding profession that requires high physical preparedness and mental endurance. At the same time, the demands of military duties often require early rising and shortened sleep duration. Such a reduction in sleep can reduce physical and mental performance, and these changes can be reflected in life satisfaction. For this reason, soldiers' life satisfaction is a crucial variable for their success and long-term service. This study examined the relationship between sleep quality, sleep duration, and life satisfaction in military medical students. The results on 35 military students showed that greater sleep quality corresponded to greater life satisfaction; this relationship was moderate and significant (r = -460, p = .005). Notably, participants (n = 17) who began to wake up without the use of an alarm clock reported an average of 11% higher life satisfaction than the participants who woke to an alarm clock; this difference between participants was statistically significant (p = .011, Cohen's d = .911). Pre- and post-intervention showed that sleep hygiene education could be a suitable solution to prevent sleep deprivation and positively impact life satisfaction. Our findings emphasize the importance of increased sleep hygiene education, especially in preparing future military officers and during military exercises. Prioritizing sleep hygiene in these ways can significantly increase soldiers' life satisfaction.

Department of Anthropology and Human Genetics Faculty of Science Charles University Prague Czech Republic

Department of Computer Science Faculty of Electrical Engineering Czech Technical University Prague Prague Czech Republic

Department of Military Medical Service Organisation and Management Faculty of Military Health Sciences University of Defence Hradec Kralove Czech Republic

Department of Neurology General University Hospital Prague Czech Republic

Department of Psychology Faculty of Arts Palacky University Olomouc Czech Republic

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Ahrberg, K., Dresler, M., Niedermaier, S., Steiger, A., & Genzel, L. (2012). The interaction between sleep quality and academic performance. PubMed DOI

Almojali, A. I., Almalki, S. A., Alothman, A. S., Masuadi, E. M., & Alaqeel, M. K. (2017). The prevalence and association of stress with sleep quality among medical students. PubMed DOI PMC

Barley, B. K., Gao, C., Luster, T., Porro, A., Parizi-Robinson, M., Quigley, D., Zinke, P., & Scullin, M. K. (2023). Chronotype in college science students is associated with behavioral choices and can fluctuate across a semester. PubMed DOI

Brand, S., Lemola, S., Holsboer-Trachsler, E., Grob, A., & Kalak, N. (2014). Sleep duration and subjective psychological wellbeing in adolescence: A longitudinal study in Switzerland and Norway. PubMed DOI PMC

Buysse, D. J., Reynolds, C. F., Monk, T. H., Berman, S. R., & Kupfer, D. J. (1989). The Pittsburgh sleep quality index: A new instrument for psychiatric practice and research. PubMed DOI

Cakal, E. (2019). Befogging reason, undermining will: Understanding the prohibition of sleep deprivation as torture and ill-treatment in international law. PubMed DOI

Cappuccio, F. P., & Miller, M. A. (2017). Sleep and cardio-metabolic disease. PubMed DOI PMC

Carciofo, R., & Song, N. (2019). The Chinese morningness-eveningness-stability-scale improved (MESSi): Validity, reliability, and associations with sleep quality, personality, affect and life satisfaction. PubMed DOI

Chen, S. Y., Feng, Z., & Yi, X. (2017). A general introduction to adjustment for multiple comparisons. PubMed DOI PMC

Cohen, J. (1988).

Consensus Conference Panel . (2015). Recommended amount of sleep for a healthy adult: A joint consensus statement of the American academy of sleep medicine and sleep research society. PubMed DOI PMC

Enright, T., & Refinetti, R. (2017). Chronotype, class times, and academic achievement of university students. PubMed DOI

Evans, J. D. (1996).

Fahrenberg, J., Myrtek, M., Schumacher, J., & Brähler, E. (2001).

Fárková, E., Novák, J. M., Manková, D., & Kopřivová, J. (2020). Comparison of Munich Chronotype Questionnaire (MCTQ) and Morningness-Eveningness Questionnaire (MEQ) Czech version. PubMed DOI

García-Buades, M. E., Peiró, J. M., Montañez-Juan, M. I., Kozusznik, M. W., & Ortiz-Bonnín, S. (2019). Happy-productive teams and work units: A systematic review of the ‘happy-productive worker thesis’. PubMed DOI PMC

Gori, A., Topino, E., DiFabio, A., & Manuti, A. (2020). The protective role of life satisfaction, coping strategies and defense mechanisms on perceived stress due to COVID-19 emergency: A chained mediation model. PubMed DOI PMC

Harrison, Y., & Horne, J. A. (2000). The impact of sleep deprivation on decision making: A review. PubMed DOI

Holmquist, I., Pohnan, R., Stritecka, H., Spevakova, B., Vasek, T., & Bostikova, V. (2021). Breastfeeding during military service: Different countries, different possibilities. PubMed DOI

Horne, J. A., & Östberg, O. (1976). A self-assessment questionnaire to determine morningness-eveningness in human circadian rhythms. PubMed

Hoseinpour, A., Akbariasbagh, P., Mohammadzadeh, F., Azad, E., & Saberi Isfeedvajani, M. (2021). Serial multiple mediation model of depression, anxiety and sleep quality between perceived stress and life satisfaction. DOI

João, K. A. D. R., Jesus, S. N. D., Carmo, C., & Pinto, P. (2018). The impact of sleep quality on the mental health of a non-clinical population. PubMed DOI

Kim, C., & Ko, H. (2018). The impact of self-compassion on mental health, sleep, quality of life and life satisfaction among older adults. PubMed DOI

Kloudova, G., Gerla, V., Rusnakova, K., Mezulanik, J., & Stehlik, M. (2020). Wellbeing of military personnelas reflected in sleep quality. In DOI

Kong, F.-Y., Li, Q., & Liu, S.-X. (2011). Poor sleep quality predicts decreased cognitive function independently of chronic mountain sickness score in young soldiers with polycythemia stationed in Tibet. PubMed DOI

Krivohlavy, J. (2013).

Lenhard, W., & Lenhard, A. (2016). Computation of effect sizes. Psychometrica. Retrieved January 4, 2023, from https://www.psychometrica.de/effect_size.html

Litwic-Kaminska, K., & Kotysko, M. (2020). Sleep quality of student athletes and non-athletes: The role of chronotype, stress and life satisfaction. PubMed DOI PMC

Manková, D., Dudysová, D., Novák, J., Fárková, E., Janků, K., Kliková, M., Bušková, J., Bartoš, A., Šonka, K., Kopřivová, J., & Angkurawaranon, C. (2021). Reliability and validity of the Czech version of the Pittsburgh sleep quality index in patients with sleep disorders and healthy controls. PubMed DOI PMC

Mantua, J., Bessey, A. F., Mickelson, C. A., Choynowski, J. J., Noble, J. J., Burke, T. M., McKeon, A. B., & Sowden, W. J. (2021). Sleep and high-risk behavior in military service members: A mega-analysis of four diverse US Army units. PubMed DOI

Matsangas, P., & Mysliwiec, V. (2018). The utility of the Pittsburgh sleep quality index in US military personnel. DOI

McGinnis, G. R., Thompson, S. T., Aguilar, C. D., Dial, M. B., Tandy, R. D., & Radzak, K. N. (2022). Chronotype and social jetlag influence performance and injury during reserve officers’ training corps physical training. PubMed DOI PMC

Montaruli, A., Castelli, L., Galasso, L., Mulè, A., Bruno, E., Esposito, F., Caumo, A., & Roveda, E. (2019). Effect of chronotype on academic achievement in a sample of Italian University students. PubMed DOI

Ness, T. E. B., & Saksvik-Lehouillier, I. (2018). The relationships between life satisfaction and sleep quality, sleep duration and variability of sleep in University students. DOI

Owens, H., Christian, B., & Polivka, B. (2017). Sleep behaviors in traditional‐age college students: A state of the science review with implications for practice. PubMed DOI

Parker, R. S., & Parker, P. (2017). The impact of sleep deprivation in military surgical teams: A systematic review. PubMed DOI

Paunio, T., Korhonen, T., Hublin, C., Partinen, M., Kivimaki, M., Koskenvuo, M., & Kaprio, J. (2008). Longitudinal study on poor sleep and life dissatisfaction in a nationwide cohort of twins. PubMed DOI

Pavelková, D. (2013).

Piper, A. T. (2016). Sleep duration and life satisfaction. DOI

Plháková, A., Dostál, D., & Janečková, D. (2013). Cirkadiánní preference ve vztahu k depresivitě, subjektivní kvalitě spánku a Cloningerovým dimenzím osobnosti.

Preckel, F., Lipnevich, A. A., Schneider, S., & Roberts, R. D. (2011). Chronotype, cognitive abilities, and academic achievement: A meta-analytic investigation. DOI

Quist, J. S., Sjödin, A., Chaput, J.-P., & Hjorth, M. F. (2016). Sleep and cardiometabolic risk in children and adolescents. PubMed DOI

Roenneberg, T., Wirz-Justice, A., & Merrow, M. (2003). Life between clocks: Daily temporal patterns of human chronotypes. PubMed DOI

Rosenthal, R. (1963). On the social psychology of the psychological experiment: 1, 2 the experimenter’s hypothesis as unintended determinant of experimental results. PubMed

Roustaei, N., Jamali, H., Jamali, M. R., Nourshargh, P., & Jamali, J. (2017). The association between quality of sleep and health-related quality of life in military and non-military women in Tehran, Iran. PubMed DOI PMC

Safhi, M., Alafif, R., Alamoudi, N., Alamoudi, M., Alghamdi, W., Albishri, S., & Rizk, H. (2020). The association of stress with sleep quality among medical students at King Abdulaziz University. PubMed DOI PMC

Salas-Vallina, A., Pozo-Hidalgo, M., & Gil-Monte, P. R. (2020). Are happy workers more productive? The mediating role of service-skill use. PubMed DOI PMC

Schwarz, J., Gerhardsson, A., van Leeuwen, W., Lekander, M., Ericson, M., Fischer, H., Kecklund, G., & Åkerstedt, T. (2018). Does sleep deprivation increase the vulnerability to acute psychosocial stress in young and older adults? PubMed DOI

Shin, J., & Kim, J. K. (2018). How a good sleep predicts life satisfaction: The role of zero-sum beliefs about happiness. PubMed DOI PMC

Totterdell, P., Reynolds, S., Parkinson, B., & Briner, R. B. (1994). Associations of sleep with everyday mood, minor symptoms and social interaction experience. PubMed DOI

Van Dongen, H. P. A., Maislin, G., Mullington, J. M., & Dinges, D. F. (2003). The cumulative cost of additional wakefulness: Dose-response effects on neurobehavioral functions and sleep physiology from chronic sleep restriction and total sleep deprivation. PubMed DOI

Vašek, T. (2014).

Vašek, T., Zdara, J., Suchanek, Z., Lasak, P., & Fajfrova, J. (2019). The impact of catering on the health and life satisfaction of coalition soldiers during their deployment on a military operation. DOI

Wang, Z., Chen, B., Li, W., Xie, F., Loke, A. Y., & Shu, Q. (2020). Sleep quality and its impacts on quality of life among military personnel in remote frontier areas and extreme cold environments. PubMed DOI PMC

Wesensten, N. J., & Balkin, T. J. (2013). The challenge of sleep management in military operations PubMed

Yarnell, A. M., & Deuster, P. (2016). Sleep as a strategy for optimizing performance. PubMed DOI