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Circadian Rhythm and Cardiovascular Recovery After Submaximal Exercise

16 octobre 2026 mis à jour par: 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

Aperçu de l'étude

Statut

Recrutement

Les conditions

Description détaillée

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.

Type d'étude

Observationnel

Inscription (Estimé)

124

Contacts et emplacements

Cette section fournit les coordonnées de ceux qui mènent l'étude et des informations sur le lieu où cette étude est menée.

Coordonnées de l'étude

Nom: Gamze Koyutürk, Asst Prof
Numéro de téléphone: +905065798671
E-mail: gamzealtinkaynak@gmail.com

Sauvegarde des contacts de l'étude

Nom: Mehmet Burak Uyaroğlu, Asst Prof
Numéro de téléphone: 5396545352
E-mail: m.uyaroglu1@gmail.com

Lieux d'étude

Turquie (Türkiye)
- - Istanbul, Turquie (Türkiye)
    - Recrutement
    - İstanbul Topkapı University
    - Contact:
      
      Gamze Koyutürk, Asst. Prof
      
      Numéro de téléphone: 5065798671
      
      E-mail: gamzekoyuturk@topkapi.edu.tr

Critères de participation

Les chercheurs recherchent des personnes qui correspondent à une certaine description, appelée critères d'éligibilité. Certains exemples de ces critères sont l'état de santé général d'une personne ou des traitements antérieurs.

Critère d'éligibilité

Âges éligibles pour étudier

18 ans à 45 ans (Adulte)

Accepte les volontaires sains

Oui

Sexes éligibles pour l'étude

Tout

Méthode d'échantillonnage

Échantillon non probabiliste

Population étudiée

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

La description

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.

Plan d'étude

Cette section fournit des détails sur le plan d'étude, y compris la façon dont l'étude est conçue et ce que l'étude mesure.

Comment l'étude est-elle conçue ?

Détails de conception

Modèles d'observation: COHORT
Perspectives temporelles: PROSPECTIVE

Nombre de groupes / cohortes

Cohortes et interventions

Groupe / Cohorte
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

Groupe / Cohorte

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

Que mesure l'étude ?

Principaux critères de jugement

Mesure des résultats	Description de la mesure	Délai
Heart Rate Recovery After the 6-Minute Walk Test Délai: 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

Mesures de résultats secondaires

Mesure des résultats	Description de la mesure	Délai
Oxygen Saturation (SpO₂) During Post-Exercise Recovery Délai: 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 Délai: 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 Délai: 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 Délai: 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

Collaborateurs et enquêteurs

C'est ici que vous trouverez les personnes et les organisations impliquées dans cette étude.

Parrainer

Saglik Bilimleri Universitesi

Les enquêteurs

Chercheur principal: Gamze Koyutürk, Asst Prof, Topkapı University
Directeur d'études: Mehmet B Uyaroğlu, Asst Prof, Fenerbahce University
Chaise d'étude: Beyza Erdoğmuş, Dr
Chaise d'étude: Hüsna Güzel, MsC, Fenerbahce University

Dates d'enregistrement des études

Ces dates suivent la progression des dossiers d'étude et des soumissions de résultats sommaires à ClinicalTrials.gov. Les dossiers d'étude et les résultats rapportés sont examinés par la Bibliothèque nationale de médecine (NLM) pour s'assurer qu'ils répondent à des normes de contrôle de qualité spécifiques avant d'être publiés sur le site Web public.

Dates principales de l'étude

Début de l'étude (Estimé)

1 octobre 2026

Achèvement primaire (Estimé)

31 mars 2027

Achèvement de l'étude (Estimé)