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Circadian Rhythm and Cardiovascular Recovery After Submaximal Exercise

16. oktober 2026 opdateret af: 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

Studieoversigt

Status

Rekruttering

Betingelser

Detaljeret 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.

Undersøgelsestype

Observationel

Tilmelding (Anslået)

124

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

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

Undersøgelse Kontakt Backup

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

Studiesteder

Tyrkiet (Türkiye)
- - Istanbul, Tyrkiet (Türkiye)
    - Rekruttering
    - İstanbul Topkapı University
    - Kontakt:
      
      Gamze Koyutürk, Asst. Prof
      
      Telefonnummer: 5065798671
      
      E-mail: gamzekoyuturk@topkapi.edu.tr

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

18 år til 45 år (Voksen)

Tager imod sunde frivillige

Køn, der er berettiget til at studere

Alle

Prøveudtagningsmetode

Ikke-sandsynlighedsprøve

Studiebefolkning

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

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

Observationsmodeller: COHORT
Tidsperspektiver: PROSPECTIVE

Antal grupper/kohorter

Kohorter og interventioner

Gruppe / kohorte
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 / kohorte

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

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål	Foranstaltningsbeskrivelse	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	Foranstaltningsbeskrivelse	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

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Saglik Bilimleri Universitesi

Efterforskere

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

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Anslået)

1. oktober 2026

Primær færdiggørelse (Anslået)

31. marts 2027

Studieafslutning (Anslået)