Evaluation of behavioral states among morning and evening active healthy individuals

Abstract

The Horne-Östberg questionnaire partly covers some factors that may be important determinants of peak time and characterize patterns of behavior. We conducted a study for the evaluation of self-reported behavioral states (hunger sensation, availability for study, physical exercise, solving daily problems, and time preferences) as expressions of underlying cyclic activity. Three hundred and eighteen community subjects without history of medical, psychiatric, or sleep disorders were evaluated in a cross-sectional design. A self-report about daily highest level of activity was used to categorize individuals into morning, evening, and indifferently active. Time-related behavioral states were evaluated with 23 visual analog questions. The responses to most analogic questions were significantly different between morning and evening active subjects. Logistic regression analysis identified a group of behaviors more strongly associated with the self-reported activity pattern (common wake up time, highest subjective fatigue, as well as wake up, bedtime, exercise and study preferences). These findings suggested that the patterns of activity presented by normal adults were related to specific common behavioral characteristics that may contribute to peak time.

Morningness–eveningness, use of stimulants, and minor psychiatric disorders among undergraduate students

“…However, there was no association between age and morningness–eveningness dimension in this study, may be because of the homogeneity of the age group. There were more males among evening types, as previously reported in the Brazilian population (Hidalgo & Caumo, 2002).…”

“…Intermediate types predominated in the sample investigated. Evening types were more frequent than morning types, as already observed in other adolescent and student populations (Hidalgo & Caumo, 2002). However, there was no association between age and morningness–eveningness dimension in this study, may be because of the homogeneity of the age group.…”

Síndrome do comer noturno: aspectos conceituais, epidemiológicos, diagnósticos e terapêuticos

“…O comportamento alimentar é complexo, envolvendo aspectos metabólicos, fisiológicos e ambientais 1,2 , que apresentam ritmicidade circadiana, herdada e espécie específica, sendo a humana essencialmente diurna. Está sincronizado ao ciclo claro/escuro e aos níveis de cortisol, serotonina, leptina, citocinas, entre outros [2][3][4][5] .…”

“…Está sincronizado ao ciclo claro/escuro e aos níveis de cortisol, serotonina, leptina, citocinas, entre outros [2][3][4][5] . Além disso, o ritmo social imprime marcado efeito na regulação da alimentação, pois a sociedade contemporânea funciona 24 horas por dia e seu impacto na quantidade, qualidade e nos horários da alimentação tem sido inexorável.…”

Identifying mediating variables with graphical models: an application to the study of causal pathways in people living with HIV

“…The causal explanations of the origins of fatigue have been divided into three main areas: 1) centrally related immune factors that change brain functions and impact cognition, mood and behavior changes [47]; 2) neuroendocrine and immune contributors [28] -stressors to the hypothalamic-pituitary-adrenal axis, the autonomic nervous system and the immune system -that impact how the body to responds appropriately to stress and inflammation; and 3) peripheral factors such as mitochondrial dysfunction related to fatigue decline in skeletal muscle function and muscle loss [24]. HIV infection, deconditioning, chronic inflammation and physiological and psychological side effects from antiretroviral treatments such as poor sleep and depression, stigma and anxiety most likely impact all three mechanisms [43,49].…”