NCT07545499Recruiting
Physical Functions and Lifestyle Behaviours in Post-COVID-19 Syndrome Based on Circadian Rhythms
Comparison of Respiratory Muscle Strength, Physical Activity Level, and Dietary Habits in Individuals With Post-COVID-19 Syndrome Having Different Circadian Rhythms
Source: ClinicalTrials.gov · Last updated 22 Apr 2026
Brief summary (registry, in English)
Post-COVID-19 syndrome is associated with persistent symptoms such as fatigue, reduced physical activity, and impaired respiratory function. Circadian rhythm differences (chronotype) may influence lifestyle behaviors including physical activity, nutrition, and sleep patterns. This observational cross-sectional study aims to compare respiratory muscle strength, physical activity levels, and nutritional habits among individuals with post-COVID-19 syndrome according to their chronotype (morning, intermediate, and evening types). Additionally, genetic analysis of the CLOCK gene polymorphism will be performed to support objective evaluation of circadian rhythm differences. The findings of this study may help to better understand the role of circadian rhythm in post-COVID-19 syndrome and contribute to the development of individualized rehabilitation and lifestyle interventions.
- Status (registry)
- Recruiting
- Study type
- Observational
- Enrollment
- 50 (estimated)
- First submitted
- 14 Apr 2026
- Start date
- 22 May 2025
- Primary completion date
- 22 Aug 2026
- Lead sponsor
- Hacettepe University
- Diseases
- Long COVID and ME/CFS
- NCT number
- NCT07545499
What you commit to
- Study type: Observational
- Planned participants: 50
- From 22 May 2025 to the primary completion date, 22 Aug 2026
- 1 site in 1 country
- Visits and tests: ask the trial team, the registry does not list them
Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.
Who cannot take part
Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.
Other illness
- Recent myocardial infarction or pulmonary embolism
- Severe uncontrolled chronic diseases
- Neurological or orthopedic conditions limiting mobility
- Psychiatric or neurological disorders affecting cooperation or test compliance
Other
- Inability to complete assessments
Who the study is looking for
- Diagnosed with Post-COVID-19 Syndrome
- Aged between 18-65 years
- Able to read and understand Turkish
- Voluntary participation
- Classified as Post-Covid Functional Status Scale (PCFS) grade 2-3
- Clinically stable condition
- No uncontrolled comorbidities (e.g., hypertension, diabetes under control)
- No orthopedic or neurological conditions affecting exercise testing
Age in the registry: 18 years to 65 years · Sex: All · Does not accept healthy volunteers
Sites (1)
Sites in registry order. Pick your city on the disease page to sort them by distance.
| Site | City | Country | Site status |
|---|---|---|---|
| Hacettepe University Faculty of Physical Therapy and Rehabilitation Coordinator of this site? Confirm its status | Ankara | Turkey (Türkiye) | Recruiting |
This page is information, not medical advice. Discuss any trial with your doctor.