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Circadian Rhythm and Cardiovascular Recovery After Submaximal Exercise

16. oktober 2026 oppdatert av: Gamze Altınkaynak, Saglik Bilimleri Universitesi

Relationship Between Cardiovascular Recovery After a Submaximal Exercise Test and Circadian Rhythm: A 6-Minute Walk Test-Based Study

This cross-sectional, observational, and analytical study aims to investigate the relationship between morningness-eveningness characteristics and cardiovascular recovery after a submaximal exercise test in healthy individuals aged 18-45 years. Circadian preference will be assessed using the Morningness-Eveningness Questionnaire, sleep quality will be assessed using the Pittsburgh Sleep Quality Index, and cardiovascular recovery will be evaluated following the 6-Minute Walk Test

Studieoversikt

Status

Rekruttering

Forhold

Detaljert beskrivelse

The study will include healthy volunteers aged 18-45 years. After written informed consent is obtained, participants will complete a sociodemographic information form, the Morningness-Eveningness Questionnaire, and the Pittsburgh Sleep Quality Index. Resting heart rate, oxygen saturation, and Borg dyspnea/fatigue scores will then be recorded, followed by the 6-Minute Walk Test. Physiological measurements will be repeated immediately after the test and at the 1st, 3rd, and 5th minutes of recovery.

The planned sample size is at least 124 participants. This was calculated using G*Power 3.1.9.7 based on a medium effect size (r=0.30), a significance level of 5% (α=0.05), and 90% statistical power, with an additional 10% allowance for possible data loss or missing data. Data will be analyzed using descriptive statistics, normality analyses, appropriate parametric or non-parametric comparison tests, correlation analyses, and multivariable regression analyses, with statistical significance set at p<0.05.

Studietype

Observasjonsmessig

Registrering (Antatt)

124

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiekontakt

Navn: Gamze Koyutürk, Asst Prof
Telefonnummer: +905065798671
E-post: gamzealtinkaynak@gmail.com

Studer Kontakt Backup

Navn: Mehmet Burak Uyaroğlu, Asst Prof
Telefonnummer: 5396545352
E-post: m.uyaroglu1@gmail.com

Studiesteder

Tyrkia (Türkiye)
- - Istanbul, Tyrkia (Türkiye)
    - Rekruttering
    - İstanbul Topkapı University
    - Ta kontakt med:
      
      Gamze Koyutürk, Asst. Prof
      
      Telefonnummer: 5065798671
      
      E-post: gamzekoyuturk@topkapi.edu.tr

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

18 år til 45 år (Voksen)

Tar imot friske frivillige

Kjønn som er kvalifisert for studier

Alle

Prøvetakingsmetode

Ikke-sannsynlighetsprøve

Studiepopulasjon

Healthy volunteers aged 18-45 years who meet the study eligibility criteria and agree to participate voluntarily.

Beskrivelse

Inclusion Criteria:

Aged 18-45 years.
Being healthy.
Voluntarily agreeing to participate in the study.

Exclusion Criteria:

Presence of cardiovascular, pulmonary, neurological, or orthopedic disease.
Having a health problem that prevents exercise.
Use of medication that may affect exercise tolerance.
Pregnancy.

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

Observasjonsmodeller: COHORT
Tidsperspektiver: PROSPECTIVE

Antall grupper / kohorter

Kohorter og intervensjoner

Gruppe / Kohort
Single Group Healthy volunteers aged 18-45 years. Participants will complete a sociodemographic information form, the Morningness-Eveningness Questionnaire, and the Pittsburgh Sleep Quality Index. Resting heart rate, oxygen saturation, and Borg dyspnea/fatigue scores will be recorded, followed by the 6-Minute Walk Test. Physiological measurements will also be obtained immediately after the test and at the 1st, 3rd, and 5th minutes of recovery. No intervention will be administered

Gruppe / Kohort

Single Group

Healthy volunteers aged 18-45 years. Participants will complete a sociodemographic information form, the Morningness-Eveningness Questionnaire, and the Pittsburgh Sleep Quality Index. Resting heart rate, oxygen saturation, and Borg dyspnea/fatigue scores will be recorded, followed by the 6-Minute Walk Test. Physiological measurements will also be obtained immediately after the test and at the 1st, 3rd, and 5th minutes of recovery. No intervention will be administered

Hva måler studien?

Primære resultatmål

Resultatmål	Tiltaksbeskrivelse	Tidsramme
Heart Rate Recovery After the 6-Minute Walk Test Tidsramme: Baseline and up to 5 minutes post-exercise	Heart rate will be recorded at rest, immediately after the 6-Minute Walk Test, and at the 1st, 3rd, and 5th minutes of the recovery period to evaluate cardiovascular recovery following submaximal exercise.	Baseline and up to 5 minutes post-exercise

Sekundære resultatmål

Resultatmål	Tiltaksbeskrivelse	Tidsramme
Oxygen Saturation (SpO₂) During Post-Exercise Recovery Tidsramme: Up to 5 minutes after the 6-Minute Walk Test	Oxygen saturation will be recorded at rest, immediately after the 6-Minute Walk Test, and at the 1st, 3rd, and 5th minutes of recovery.	Up to 5 minutes after the 6-Minute Walk Test
Borg Dyspnea/Fatigue Score During Post-Exercise Recovery Tidsramme: Baseline and up to 5 minutes post-exercise	Dyspnea and fatigue will be assessed using the Borg Dyspnea/Fatigue Scale at rest, immediately after the 6-Minute Walk Test, and at the 1st, 3rd, and 5th minutes of recovery.	Baseline and up to 5 minutes post-exercise
Morningness-Eveningness Characteristics Tidsramme: Baseline	The Morningness-Eveningness Questionnaire assesses individuals' preference for the timing of sleep and daily activities. Scores range from 16 to 86, with higher scores indicating a stronger morning preference and lower scores indicating a stronger evening preference, rather than better or worse outcomes.	Baseline
Sleep Quality Tidsramme: Baseline	Sleep quality will be assessed using the Pittsburgh Sleep Quality Index (PSQI), which evaluates sleep quality and disturbances over the past month. The global score ranges from 0 to 21, with higher scores indicating poorer sleep quality.	Baseline

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Sponsor

Saglik Bilimleri Universitesi

Etterforskere

Hovedetterforsker: Gamze Koyutürk, Asst Prof, Topkapı University
Studieleder: Mehmet B Uyaroğlu, Asst Prof, Fenerbahce University
Studiestol: Beyza Erdoğmuş, Dr
Studiestol: Hüsna Güzel, MsC, Fenerbahce University

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart (Antatt)

1. oktober 2026

Primær fullføring (Antatt)

31. mars 2027

Studiet fullført (Antatt)