Study of Respiratory Muscle Strength, Physical Activity, and Diet in Adults with Post-COVID-19 Syndrome Comparing Morning and Evening Circadian Rhythm Types

What this Trial Is About

Researchers are investigating how circadian rhythms, or chronotypes, affect people who have ongoing symptoms after COVID-19 infection, known as post-COVID-19 syndrome. This condition includes fatigue, reduced physical activity, and breathing difficulties. The study aims to compare respiratory muscle strength, physical activity, and dietary habits among individuals with different chronotypes morning, intermediate, and evening types. Genetic testing of the CLOCK gene will also be done to better understand circadian rhythm differences. This observational study includes adults aged 18 to 65 years diagnosed with post-COVID-19 syndrome. Participants will be grouped by their chronotype using a questionnaire. Researchers will measure respiratory muscle strength using breathing tests and devices, physical activity through questionnaires, and dietary intake by 24-hour recall. Additional assessments include sleep quality, fatigue, gastrointestinal symptoms, and genetic analysis from blood samples. Participants will complete various questionnaires and physical tests during a single visit. Respiratory muscle strength, endurance, physical activity, diet, sleep quality, and fatigue severity will be evaluated. Blood samples will be collected for genetic analysis. The study will help clarify how circadian rhythms relate to symptoms and lifestyle in post-COVID-19 syndrome, potentially guiding personalized rehabilitation approaches.

Physical Functions and Lifestyle Behaviours in Post-COVID-19 Syndrome Based on Circadian Rhythms