{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T10:00:22Z","timestamp":1790762422464,"version":"4.1.0"},"reference-count":54,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2026,5,10]],"date-time":"2026-05-10T00:00:00Z","timestamp":1778371200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JCM"],"abstract":"<jats:p>Background\/Objectives: Sleep disorders and depressive symptoms are common among college students and can negatively impact quality of life. Physical activity is recommended as a non-pharmacological approach to support sleep and mental health; however, findings regarding regular evening aerobic exercise in young adults are limited. This study aimed to examine changes in sleep quality, depressive symptoms and sleep\u2013wake preferences among university students participating in an eight-week evening aerobic exercise program. Methods: This quasi-experimental study included 51 university students who were assessed before and after an eight-week intervention. Participants engaged in 60 min of aerobic exercise three days a week in the evening (between 6:00 PM and 10:00 PM). Sleep quality was assessed using the Pittsburgh Sleep Quality Index (PSQI), depressive symptoms using the Beck Depression Inventory (BDI), and morning\u2013evening type using the Morning\u2013Evening Questionnaire (MEQ). Results: At the end of the eight-week period, a significant improvement was observed in total PSQI scores; significant changes were also noted in the subscales of sleep onset latency, habitual sleep efficiency, sleep disturbances, and daytime dysfunction (p &lt; 0.05). A significant decrease was observed in BDI scores (median: from 17 to 9; p &lt; 0.001), and the proportion of students with moderate-to-severe depressive symptoms decreased. A significant increase was also observed in MEQ scores (p &lt; 0.001), which was found to be consistent with a shift toward an earlier sleep\u2013wake preference. Conclusions: While these findings suggest that an eight-week evening aerobic exercise program may offer potential benefits in improving sleep quality and reducing depressive symptoms among university students, it is thought that changes in sleep\u2013wake preferences may reflect short-term behavioral adaptation.<\/jats:p>","DOI":"10.3390\/jcm15103664","type":"journal-article","created":{"date-parts":[[2026,5,11]],"date-time":"2026-05-11T17:17:42Z","timestamp":1778519862000},"page":"3664","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Changes in Sleep Quality, Depressive Symptoms, and Sleep\u2013Wake Preference Among University Students Participating in an Eight-Week Evening Aerobic Exercise Program: A Quasi-Experimental Study"],"prefix":"10.3390","volume":"15","author":[{"given":"\u015eenay","family":"Demir Yaz\u0131c\u0131","sequence":"first","affiliation":[{"name":"Department of Physical Medicine and Rehabilitation, Faculty of Medicine, Ayd\u0131n Adnan Menderes University, Ayd\u0131n 09100, T\u00fcrkiye"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3240-7177","authenticated-orcid":false,"given":"Ecem","family":"Ersungur","sequence":"additional","affiliation":[{"name":"S\u00f6ke Vocational School of Health Services, Ayd\u0131n Adnan Menderes University, Ayd\u0131n 09100, T\u00fcrkiye"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nazan","family":"\u00d6zt\u00fcrk","sequence":"additional","affiliation":[{"name":"S\u00f6ke Vocational School of Health Services, Ayd\u0131n Adnan Menderes University, Ayd\u0131n 09100, T\u00fcrkiye"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,5,10]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"5","DOI":"10.1038\/s44323-024-00018-w","article-title":"The Impact of Exercise on Sleep and Sleep Disorders","volume":"2","author":"Korkutata","year":"2025","journal-title":"npj Biol. Timing Sleep"},{"key":"ref_2","first-page":"9","article-title":"Prescribing Exercise and Physical Activity to Treat and Manage Health Conditions","volume":"92","author":"Rooney","year":"2023","journal-title":"Ulst. Med. J."},{"key":"ref_3","first-page":"70","article-title":"Chronotype and Cognition: Comparison of Executive Functions, Sleepiness, and Fatigue According to Circadian Rhythm Preference","volume":"12","author":"Demirci","year":"2025","journal-title":"J. Turk. Sleep Med."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"1153","DOI":"10.3109\/07420528.2012.719971","article-title":"Circadian Typology: A Comprehensive Review","volume":"29","author":"Adan","year":"2012","journal-title":"Chronobiol. Int."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"429","DOI":"10.1016\/j.smrv.2007.07.005","article-title":"Epidemiology of the Human Circadian Clock","volume":"11","author":"Roenneberg","year":"2007","journal-title":"Sleep Med. Rev."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"20","DOI":"10.57224\/jhpr.1549988","article-title":"D\u00fczenli egzersiz yapan bireylerde kronotipler ve yeme al\u0131\u015fkanl\u0131klar\u0131","volume":"7","author":"Kenger","year":"2025","journal-title":"Sa\u011fl\u0131k Profesyonelleri Ara\u015ft. Derg."},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Montaruli, A., Castelli, L., Mul\u00e8, A., Scurati, R., Esposito, F., Galasso, L., and Roveda, E. (2021). Biological Rhythm and Chronotype: New Perspectives in Health. Biomolecules, 11.","DOI":"10.3390\/biom11040487"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"552","DOI":"10.1080\/07420528.2020.1729787","article-title":"Effect of Chronotype on Motor Skills Specific to Soccer in Adolescent Players","volume":"37","author":"Roveda","year":"2020","journal-title":"Chronobiol. Int."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"521","DOI":"10.1080\/07420528.2024.2321942","article-title":"Associations between Chronotype and Physical Activity and Well-Being in Adults","volume":"41","author":"Karykowska","year":"2024","journal-title":"Chronobiol. Int."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"57","DOI":"10.18061\/bhac.v4i2.7617","article-title":"The Influence of Chronotype and Grit on Lifestyle and Physical Activity","volume":"4","author":"Allee","year":"2020","journal-title":"Build. Healthy Acad. Communities"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"98","DOI":"10.1186\/1479-5868-10-98","article-title":"A Systematic Review of the Psychological and Social Benefits of Participation in Sport for Children and Adolescents: Informing Development of a Conceptual Model of Health through Sport","volume":"10","author":"Eime","year":"2013","journal-title":"Int. J. Behav. Nutr. Phys. Act."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"e017785","DOI":"10.1136\/bmjopen-2017-017785","article-title":"Physical Activity in Former Elite Cricketers and Strategies for Promoting Physical Activity after Retirement from Cricket: A Qualitative Study","volume":"7","author":"Filbay","year":"2017","journal-title":"BMJ Open"},{"key":"ref_13","doi-asserted-by":"crossref","unstructured":"Irandoust, K., Taheri, M., Chtourou, H., Nikolaidis, P.T., Rosemann, T., and Knechtle, B. (2019). Effect of Time-of-Day-Exercise in Group Settings on Level of Mood and Depression of Former Elite Male Athletes. Int. J. Environ. Res. Public Health, 16.","DOI":"10.3390\/ijerph16193541"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"425","DOI":"10.2147\/IJGM.S11557","article-title":"Sleep and Its Importance in Adolescence and in Common Adolescent Somatic and Psychiatric Conditions","volume":"4","author":"Brand","year":"2011","journal-title":"Int. J. Gen. Med."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"1151","DOI":"10.1007\/s11325-020-02020-5","article-title":"Sleep Quality in Medical Students: A Comprehensive Meta-Analysis of Observational Studies","volume":"24","author":"Rao","year":"2020","journal-title":"Sleep Breath."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"427","DOI":"10.1007\/s10865-015-9617-6","article-title":"The Effects of Physical Activity on Sleep: A Meta-Analytic Review","volume":"38","author":"Kredlow","year":"2015","journal-title":"J. Behav. Med."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"157","DOI":"10.1016\/S1836-9553(12)70106-6","article-title":"Exercise Training Improves Sleep Quality in Middle-Aged and Older Adults with Sleep Problems: A Systematic Review","volume":"58","author":"Yang","year":"2012","journal-title":"J. Physiother."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"387","DOI":"10.1053\/smrv.2000.0110","article-title":"Exercise and Sleep","volume":"4","author":"Driver","year":"2000","journal-title":"Sleep Med. Rev."},{"key":"ref_19","first-page":"78","article-title":"\u00dcniversite \u00d6\u011frencilerinin Umutsuzluk, Kayg\u0131 ve \u0130li\u015fkilerle \u0130lgili Bili\u015fsel \u00c7arp\u0131tmalar\u0131","volume":"2","author":"Karaman","year":"2013","journal-title":"Bili\u015fsel Davran\u0131\u015f\u00e7\u0131 Psikoterapi ve Ara\u015ft\u0131rmalar Derg."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"114","DOI":"10.47678\/cjhe.v47i1.186429","article-title":"Correlates of Depression in First-Year College Students","volume":"47","author":"Villatte","year":"2017","journal-title":"Can. J. High. Educ."},{"key":"ref_21","first-page":"370","article-title":"Grit as a Predictor of Depression, Anxiety and Stress among University Students: A Structural Equation Modeling","volume":"19","author":"Ozhan","year":"2018","journal-title":"Anatol. J. Psychiatry"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"4","DOI":"10.1038\/s41576-022-00519-z","article-title":"Genetics of Circadian Rhythms and Sleep in Human Health and Disease","volume":"24","author":"Lane","year":"2023","journal-title":"Nat. Rev. Genet."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"781","DOI":"10.3233\/BMR-230279","article-title":"Effect of an Online Posture Exercise Program during the COVID-19 Pandemic on Students\u2019 Musculoskeletal Pain and Quality of Life","volume":"37","author":"Ersungur","year":"2024","journal-title":"J. Back Musculoskelet. Rehabil."},{"key":"ref_24","first-page":"712","article-title":"Beyaz Yakal\u0131 \u00c7al\u0131\u015fanlarda \u0130\u015fe Ba\u011fl\u0131 Boyun, S\u0131rt ve Omuz B\u00f6lgelerine Ait Kas \u0130skelet Sistemi Rahats\u0131zl\u0131klar\u0131n\u0131n ve \u0130\u015fe Devams\u0131zl\u0131\u011fza Etki Eden Fakt\u00f6rlerin \u0130ncelenmesi","volume":"8","author":"Zenginler","year":"2018","journal-title":"Sak. Med. J."},{"key":"ref_25","first-page":"97","article-title":"A Self-Assessment Questionnaire to Determine Morningness-Eveningness in Human Circadian Rhythms","volume":"4","author":"Horne","year":"1976","journal-title":"Int. J. Chronobiol."},{"key":"ref_26","first-page":"40","article-title":"A reliability study of the Turkish version of the mornings-evenings questionnaire","volume":"16","author":"Ercan","year":"2005","journal-title":"Turk Psikiyatr. Derg. Turk. J. Psychiatry"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"339","DOI":"10.1002\/nop2.1067","article-title":"Evaluation of Sleep Quality among Nursing Faculty: Application of the Pittsburgh Sleep Quality Index-A Descriptive Correlational Study","volume":"9","author":"Cox","year":"2022","journal-title":"Nurs. Open"},{"key":"ref_28","first-page":"90","article-title":"Relationship Between Sleep Disorders and Attention Deficit-Hyperactivity Disorder Symptoms in University Students","volume":"33","author":"Karahan","year":"2021","journal-title":"Turk. J. Psychiatry"},{"key":"ref_29","unstructured":"Zeynep, B. (2026, April 30). Bale E\u011fitiminin Eri\u015fkin Bireylerde Uyku Kalitesi ve Psikososyal Duruma Etkisi: Deneysel Ara\u015ft\u0131rma, Available online: https:\/\/search.trdizin.gov.tr\/tr\/yayin\/detay\/515123\/bale-egitiminin-eriskin-bireylerde-uyku-kalitesi-ve-psikososyal-duruma-etkisi-deneysel-arastirma."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"170","DOI":"10.1016\/j.explore.2020.11.003","article-title":"Determinants of Sleep Quality in College Students: A Literature Review","volume":"17","author":"Wang","year":"2021","journal-title":"Explore"},{"key":"ref_31","first-page":"3","article-title":"Beck Depresyon Envanterinin \u00dcniversite \u00d6grencileri I\u00e7in Ge\u00e7erliligi ve G\u00fcvenilirligi","volume":"6","author":"Hisli","year":"1989","journal-title":"T\u00fcrk Psikol. Derg."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"65","DOI":"10.1016\/j.ajsep.2025.06.001","article-title":"Sleep, Chronotype and Health Promoting Behaviours as Predictors of Taiwanese University Students\u2019 Depressive Symptoms","volume":"5","author":"Chen","year":"2025","journal-title":"Asian J. Sport Exerc. Psychol."},{"key":"ref_33","doi-asserted-by":"crossref","unstructured":"Shen, B., Ma, C., Wu, G., Liu, H., Chen, L., and Yang, G. (2023). Effects of Exercise on Circadian Rhythms in Humans. Front. Pharmacol., 14.","DOI":"10.3389\/fphar.2023.1282357"},{"key":"ref_34","doi-asserted-by":"crossref","unstructured":"Weinert, D., and Gubin, D. (2022). The Impact of Physical Activity on the Circadian System: Benefits for Health, Performance and Wellbeing. Appl. Sci., 12.","DOI":"10.3390\/app12189220"},{"key":"ref_35","doi-asserted-by":"crossref","unstructured":"Sempere-Rubio, N., Aguas, M., and Faubel, R. (2022). Association between Chronotype, Physical Activity and Sedentary Behaviour: A Systematic Review. Int. J. Environ. Res. Public Health, 19.","DOI":"10.3390\/ijerph19159646"},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"1761","DOI":"10.4314\/ahs.v20i4.29","article-title":"Aerobic Exercise Affects Sleep, Psychological Wellbeing and Immune System Parameters among Subjects with Chronic Primary Insomnia","volume":"20","year":"2020","journal-title":"Afr. Health Sci."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"47","DOI":"10.1016\/S1087-0792(03)00026-1","article-title":"A Systematic Review of Non-Pharmacological Therapies for Sleep Problems in Later Life","volume":"8","author":"Montgomery","year":"2004","journal-title":"Sleep Med. Rev."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"615","DOI":"10.1016\/j.jadohealth.2012.02.020","article-title":"Daily Morning Running for 3 Weeks Improved Sleep and Psychological Functioning in Healthy Adolescents Compared with Controls","volume":"51","author":"Kalak","year":"2012","journal-title":"J. Adolesc. Health"},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"46","DOI":"10.1016\/j.physbeh.2013.07.001","article-title":"Increased Self-Reported and Objectively Assessed Physical Activity Predict Sleep Quality among Adolescents","volume":"120","author":"Lang","year":"2013","journal-title":"Physiol. Behav."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"558","DOI":"10.1002\/oby.20996","article-title":"Effects of a 2-Year Behavioral Weight Loss Intervention on Sleep and Mood in Obese Individuals Treated in Primary Care Practice","volume":"23","author":"Alfaris","year":"2015","journal-title":"Obesity"},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"1671","DOI":"10.1017\/S0033291723003586","article-title":"The Effect of a Low-Calorie Diet on Depressive Symptoms in Individuals with Overweight or Obesity: A Systematic Review and Meta-Analysis of Interventional Studies","volume":"54","author":"Applewhite","year":"2024","journal-title":"Psychol. Med."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"108170","DOI":"10.1016\/j.maturitas.2024.108170","article-title":"Obstructive Sleep Apnea Syndrome (OSAS) in Women: A Forgotten Cardiovascular Risk Factor","volume":"193","author":"Moscucci","year":"2025","journal-title":"Maturitas"},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"1441","DOI":"10.5664\/jcsm.9820","article-title":"Validation of the STOP Questionnaire as a Screening Tool for OSA among Different Populations: A Systematic Review and Meta-Regression Analysis","volume":"18","author":"Patel","year":"2022","journal-title":"J. Clin. Sleep Med."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"355","DOI":"10.1016\/j.csm.2004.12.003","article-title":"Effects of Exercise on Sleep","volume":"24","author":"Youngstedt","year":"2005","journal-title":"Clin. Sports Med."},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"667","DOI":"10.1007\/s00127-008-0345-x","article-title":"The Prevalence and Socio-Demographic Correlations of Depression, Anxiety and Stress among a Group of University Students","volume":"43","author":"Bayram","year":"2008","journal-title":"Soc. Psychiatry Psychiatr. Epidemiol."},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"829","DOI":"10.3109\/07420528.2014.911188","article-title":"Morningness-Eveningness Interferes with Perceived Health, Physical Activity, Diet and Stress Levels in Working Women: A Cross-Sectional Study","volume":"31","author":"Haraszti","year":"2014","journal-title":"Chronobiol. Int."},{"key":"ref_47","first-page":"039","article-title":"D\u00fczenli egzersiz yapan bireylerde kronotipler ve yeme al\u0131\u015fkanl\u0131klar\u0131","volume":"46","year":"2011","journal-title":"Spor Hekim. Derg."},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"290","DOI":"10.5935\/1984-0063.20180045","article-title":"Quality of Sleep and Depression in College Students: A Systematic Review","volume":"11","author":"Dinis","year":"2018","journal-title":"Sleep Sci."},{"key":"ref_49","doi-asserted-by":"crossref","unstructured":"Uchida, S., Shioda, K., Morita, Y., Kubota, C., Ganeko, M., and Takeda, N. (2012). Exercise Effects on Sleep Physiology. Front. Neurol., 3.","DOI":"10.3389\/fneur.2012.00048"},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"1005","DOI":"10.1016\/j.jpsychires.2011.02.005","article-title":"Moderate Exercise Improves Depression Parameters in Treatment-Resistant Patients with Major Depressive Disorder","volume":"45","author":"Silverio","year":"2011","journal-title":"J. Psychiatr. Res."},{"key":"ref_51","doi-asserted-by":"crossref","first-page":"167","DOI":"10.2165\/00007256-200029030-00003","article-title":"Physical Activity and Mental Health: Current Concepts","volume":"29","author":"Paluska","year":"2000","journal-title":"Sports Med."},{"key":"ref_52","doi-asserted-by":"crossref","first-page":"64","DOI":"10.31254\/sportmed.7206","article-title":"Association of Morning and Evening Physical Exercise with Sleep Quality and Insomnia: Differences between Chronotypes","volume":"7","author":"Mecenas","year":"2023","journal-title":"Int. J. Sport Exerc. Health Res."},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"487","DOI":"10.2147\/NSS.S256625","article-title":"Increased Global PSQI Score Is Associated with Depressive Symptoms in an Adult Population from the United States","volume":"12","author":"Huang","year":"2020","journal-title":"Nat. Sci. Sleep"},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"340","DOI":"10.1002\/jclp.23037","article-title":"Chronotype and Depressive Symptoms: A Moderated Mediation Model of Sleep Quality and Resilience in the 1st-Year College Students","volume":"77","author":"Zhou","year":"2021","journal-title":"J. Clin. Psychol."}],"container-title":["Journal of Clinical Medicine"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2077-0383\/15\/10\/3664\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,5,11]],"date-time":"2026-05-11T17:41:18Z","timestamp":1778521278000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2077-0383\/15\/10\/3664"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,5,10]]},"references-count":54,"journal-issue":{"issue":"10","published-online":{"date-parts":[[2026,5]]}},"alternative-id":["jcm15103664"],"URL":"https:\/\/doi.org\/10.3390\/jcm15103664","relation":{},"ISSN":["2077-0383"],"issn-type":[{"value":"2077-0383","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,5,10]]}}}