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
Hacettepe University
50 participants
May 22, 2025
OBSERVATIONAL
Conditions
Summary
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.
Eligibility
Inclusion Criteria8
- 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
Exclusion Criteria5
- 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
- Inability to complete assessments
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Locations(1)
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NCT07545499