Výsledky projektu Využití úpravy spánkové hygieny odpovídající chronotypu v léčbě obezity

Abstract
Introduction: The study investigates the association between circadian phenotype (CP), its stability (interdaily stability
- IS) and physical activity (PA) in a weight loss (WL) programme.
Methods: Seventy-five women in WL conservative treatment (BMI ≥ 25 kg/m2) were measured (for about 3 months in
between 2016 and 2018) by actigraphy.
Results: We observed a difference in time of acrophase (p = 0.049), but no difference in IS (p = 0.533) between women
who lost and did not lose weight. There was a difference in PA (mesor) between groups of women who lost weight
compared to those who gained weight (p = 0.007). There was a relationship between IS and PA parametres mesor:
p0.001; and the most active 10 h of a day (M10): p < 0.001 - the more stable were women in their rhythm, the more PA
they have. Besides confirming a relationship between PA and WL, we also found a relation between WL and CP based
on acrophase. Although no direct relationship was found for the indicators of rhythm stability (IS), they can
be considered very important variables because of their close connection to PA – a main factor that contributes to the
success of the WL programme.
Discussion: According to the results of the study, screening of the CP and its stability may be beneficial in the creation
of an individualized WL plan.
Keywords: Obesity, Actigraphy, Circadian rhythm, Stability of the rhythm, Physical activity, Sleep