INTRODUCTION Sleep duration, chronotype and social jetlag have been associated with body mass index (BMI) and abdominal obesity. The optimal sleep duration regarding BMI has previously been found to be 7-8 hours, but these studies have not been carried out in the subarctic or have lacked some central variables. The aims of our study were to examine the associations between sleep variables and b...

The aim of this study was to investigate the influence of chronotype on mood state and ratings of perceived exertion (RPE) before and in response to acute high intensity interval exercise (HIIE) performed at different times of the day. Based on the morningness-eveningness questionnaire, 12 morning-types (M-types; N = 12; age 21 ± 2 years; height 179 ± 5 cm; body mass 74 ± 12 kg) and 11 evening-...

The chronotype, which reflects the circadian rhythm preferences of individuals in their daily activities and sleep-wake cycles, can be considered on a dimension extreme morningism eveningism. Individuals with morning evening chronotypes face many physical psychological dangers due to accumulated sleep debt, short total time insufficient efficiency. In chronotypes, especially people, social jet-...

Dark triad (DT) refers to a set of antisocial and self-interested personality traits (Machiavellianism, sub-clinical psychopathy narcissism). The nocturnal cognitive niche hypothesis suggests that the DT was advantageous in because it enables exploitative strategies would be linked with an evening-oriented chronotype as part fast life history strategy. In present self-report study (N = 300), th...

The paper examines the annual profile of fluctuating microalternations some ECG parameters in healthy students who live northern conditions and have different chronotypes. main method research was dispersion mapping that helped assess energy metabolic processes myocardium. Among male female students, 14,3% had morning chronotype, 50,7% arrhythmic 35% evening chronotype. Previously published res...

Sleep loss and circadian disruption-a state of misalignment between physiological functions and imposed sleep/wake behavior-supposedly play central roles in the etiology of shift work-related pathologies [1-4]. Circadian entrainment is, however, highly individual [5], resulting in different chronotypes [6, 7]. Chronotype in turn modulates the effects of working times: compared to late chronotyp...

The ability to generate torque during a maximum voluntary contraction (MVC) changes over the day. The present experiments were designed to determine the influence of an individual's chronotype on this diurnal rhythm and on cortical, spinal, and peripheral mechanisms that may be related to torque production. After completing a questionnaire to determine chronotype, 18 subjects (9 morning people,...

Abstract Objectives The NutriClock Study aims to test the effect of a chronotype-based nutritional intervention in circadian homeostasis and clinical laboratory biomarkers dysmetabolism. Methods is randomised, controlled, parallel trial, conducted over 10 weeks (2 baseline assessments 8 intervention), with 3- 6-months follow-up. study includes 2 groups patients cardiometabolic disturbances: an ...

AIM: To assess individual subjective chronotypic properties in residents of Khanty-Mansiysk under the influence such biotropic and social stress factors as regular daytime aperiodically presented shift nighttime employment.
 MATERIALS AND METHODS: This study involved students (100 girls 53 boys) Khanty-Mansi Autonomous Okrug Yugra with a daily load employees Ambulance station (31 women 26 ...