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Chronobiology International

Corina Faßl, Mirja Quante, Sara Mariani, Christoph Randler
Aim of the present study is an additional validation of the Morningness-Eveningness-Stability Scale improved (MESSi). We screened a total of 97 German students using the reduced Morningness-Eveningness Questionnaire (rMEQ) to identify a subsample (N = 42) of definite morning and evening types (31% males, mean age: 24.8 ± 5.8 years). The participants provided information about their sleep-wake rhythm (diary), personality traits (questionnaire) and experienced actigraphic monitoring. Correlations of the MESSi components "Morning affect subscale" (MA) (r = 0...
September 13, 2018: Chronobiology International
Hiroki Okauchi, Chiaki Hashimoto, Reiko Nakao, Katsutaka Oishi
Inappropriate eating habits such as skipping breakfast and eating late at night are associated with risk for abnormal weight-gain and adiposity. We previously reported that time-imposed feeding during the daytime (inactive phase) induces obesity and metabolic disorders accompanied by physical inactivity in mice. The present study compares metabolic changes induced in mice by time-imposed feeding under voluntary wheel-running (RW) and sedentary (SED) conditions to determine the effects of voluntary wheel-running activity on obesity induced in mice by feeding at inappropriate times...
September 13, 2018: Chronobiology International
Mirkka Maukonen, Noora Kanerva, Timo Partonen, Satu Männistö
Individuals with a later preference for the daily activities (evening types) tend to have unhealthier behaviors, which could increase their risk for obesity when compared those with an earlier preference (morning types). Furthermore, later food intake timing, another behavior more characteristic of evening types, has been associated with obesity. However, chronotype differences in the long-term weight change and the role of chronotype in the association between energy intake timing and obesity risk are not clear...
September 13, 2018: Chronobiology International
Cristiana Araújo Gontijo, Bruna Borges Macedo Cabral, Laura Cristina Tibiletti Balieiro, Gabriela Pereira Teixeira, Walid Makin Fahmy, Yara Cristina de Paiva Maia, Cibele Aparecida Crispim
Animal studies strongly suggest that timed feeding can have beneficial physiological effects, including protection against the obesogenic and metabolic consequences of a high-fat diet. However, the relationship between variables related to the timing of eating and diet quality in pregnancy women, which is considered as a period of nutritional vulnerability, is still poorly described in the literature. Therefore, the aim of the present study was to investigate the associations between time-related eating patterns and chronotype with diet quality of pregnant women...
September 13, 2018: Chronobiology International
Omar Boukhris, Hsen Hsouna, Lassaad Chtourou, Raouf Abdesalem, Sahar BenSalem, Nabil Tahri, Khaled Trabelsi, Stephen R Stannard, Hamdi Chtourou
The present study was designed to investigate the effect of Ramadan fasting on feelings, dietary intake, rating of perceived exertion (RPE) and repeated high-intensity short-term maximal performance. Thirteen physically active men (age: 21.2 ± 2.9 years, height: 175.6 ± 5.6 cm, body-mass: 72.4 ± 8.6 kg) performed a 5-m shuttle run test (6 × 30-s + 35-s of recovery in-between) during five experimental periods: fifteen days before Ramadan (BR), the first ten days of Ramadan (FR), the last ten days of Ramadan (ER), ten days after Ramadan (AR10) and 20 days after Ramadan (AR20)...
September 12, 2018: Chronobiology International
Seth D Rhoades, Lisa Bastarache, Joshua C Denny, Jacob J Hughey
The electronic health record (EHR) contains rich histories of clinical care, but has not traditionally been mined for information related to sleep habits. Here, we performed a retrospective EHR study based on a cohort of 3,652 individuals with self-reported sleep behaviors documented from visits to the sleep clinic. These individuals were obese (mean body mass index 33.6 kg/m2 ) and had a high prevalence of sleep apnea (60.5%), however we found sleep behaviors largely concordant with prior prospective cohort studies...
September 5, 2018: Chronobiology International
Nataly Zion, Tamar Shochat
Decline in cognitive functioning in the workplace is a major concern for health care systems. Understanding factors associated with nighttime functioning is imperative for instituting organizational risk management policies and developing personalized countermeasures. The present study aims to identify individual factors associated with cognitive functioning during the night shift of hospital nurses working on irregular rotating-shift schedules. Ninety-two female nurses were recruited from 17 wards in two general hospitals, using convenience sampling by clusters...
August 24, 2018: Chronobiology International
Rodrigo Fortes-Silva, Silvan Vianna Do Valle, Jose Fernando Lopéz-Olmeda
This study aimed to investigate the existence of day-night differences in the time for anesthesia and recovery in tambaqui exposed to the anesthetic eugenol and the influence of feeding time. Thus, we evaluated: (1) swimming activity; (2) food anticipatory activity (FAA) as a synchronizer of swimming activity and change to susceptibility to anesthetic; and (3) the effects of diurnal/nocturnal anesthesia exposure of fish feeding in the mid-light phase: 12:00 h (ML) and fish feeding in the mid-dark phase: 00:00 h (MD)...
August 24, 2018: Chronobiology International
Yuma Saito, Yu Kume, Ayuto Kodama, Kotaro Sato, Megumi Yasuba
BACKGROUND: Limited information is available on the relationship between sleep disturbances during nighttime and the behavioral and psychological symptoms of dementia in older nursing-home residents. However, a few reports on the association between the circadian rest-activity rhythm and the behavioral and psychological symptoms of dementia in older residents have been published. The main objective of the present study was to examine the association among the circadian rest-activity rhythm, behavioral and psychological symptoms, and the cognitive function status among older individuals living in facilities...
August 13, 2018: Chronobiology International
David Rivera-Estrada, Raúl Aguilar-Roblero, Claudia Alva-Sánchez, Iván Villanueva
Eating behavior is controlled by the energy needs of the organism. The need to provide a constant supply of energy to tissues is a homeostatic drive that adjusts feeding behavior to the energetic condition of the organism. On the other hand, food intake also shows a circadian variation synchronized to the light-dark cycle and food availability. Thus, feeding is subjected to both homeostatic and circadian regulation mechanisms that determine the amount and timing of spontaneous food intake in normal conditions...
August 10, 2018: Chronobiology International
Kati Nowack, Elke Van Der Meer
The synchrony effect (i.e. superior performance at optimal, inferior performance at suboptimal times of day) has been broadly studied within the context of circadian rhythms. Whether one chronotype copes better with the synchrony effect than the other received only insufficient empirical attention. We report on an applied experimental study investigating the impact of chronotype on the synchrony effect in a semantic analogy task. To detect an analogy, 36 participants (12 males) aged between 18 and 40 had to decide whether the relation between events of a source pair was mirrored by the relation between events of a target pair (e...
August 7, 2018: Chronobiology International
Stephanie J Crowley, Chelsea L Fournier, Charmane I Eastman
We examined phase shifts to bright morning light when sleep was restricted by delaying bedtimes. Adolescents (n = 6) had 10-h sleep/dark opportunities for 6 days. For the next 2 days, half were put to bed 4.5 h later and then allowed to sleep for 5.5 h (evening room light + sleep restriction). The others continued the 10-h sleep opportunities (sleep satiation). Then, sleep schedules were gradually shifted earlier and participants received bright light (90 min, ~6000 lux) after waking for 3 days. As expected, sleep satiation participants advanced (~2 h)...
August 7, 2018: Chronobiology International
Paul Emmanuel, Malcolm von Schantz
In spite of suspected circadian differences between different ancestral groups, most human studies have used individuals of European descent. This also applies to three recent genome-wide association studies (GWAS), which pinpointed a number of chronotype loci. We investigated the distribution of these hits in different 1000 Genomes populations. We found 6 out of the 41 alleles previously identified by GWAS in European participants (in the genes RGS16, PER2 and AK5 and between the genes APH1A and CA14) to be absent from some non-European population groups...
August 7, 2018: Chronobiology International
Katsutaka Oishi, Chiaki Hashimoto
Feeding at unusual times of the day is thought to be associated with obesity and metabolic disorders in both experimental animals and humans. We previously reported that time-imposed feeding during the sleep phase (daytime feeding, DF) induces obesity and metabolic disorders compared with mice fed only during the active phase (nighttime feeding, NF). The present study aimed to determine whether leptin resistance is caused by DF, and whether it is involved in the underlying mechanisms of DF-induced obesity in mice, since leptin plays an essential role in regulating energy expenditure and adiposity in addition to food intake...
August 7, 2018: Chronobiology International
Momoko Kayaba, Taeko Sasai-Sakuma, Yuichi Inoue
Social jetlag has recently attracted attention as the circadian misalignment between biological and social clocks. We aimed to examine social jetlag and its effect on daytime sleepiness and daily functions in patients with narcolepsy, behaviorally induced insufficient sleep syndrome (BIISS) and delayed sleep-wake phase disorder (DSPD). The levels of social jetlag (SJLmid ) and sleep-corrected social jetlag (SJLsc ) were calculated for each patient, and the effect of these social jetlag-related parameters on daytime sleepiness and daily functions were examined...
August 1, 2018: Chronobiology International
Ignacio Estevan, Ana Silva, Bettina Tassino
Morningness-Eveningness (M-E) has been associated with school performance when school activities are arranged early in the morning. This study aims to evaluate this association in 224 adolescents of a secondary school in Montevideo, Uruguay, attending either morning or afternoon shifts. Students' socio-demographic characteristics and performance indicators were similar across shifts, while afternoon-shift students exhibited later circadian preferences. After controlling for socio-demographic and other educational variables, eveningness was associated with lower grades only in morning-shift students...
August 1, 2018: Chronobiology International
Napohn Chongprasertpon, John Joseph Coughlan, Ciara Cahill, Thomas John Kiernan
This was a retrospective observational analysis of all (n = 876) ST-segment elevation myocardial infarction (STEMI) patients treated with primary percutaneous coronary intervention (PPCI) at University Hospital Limerick (UHL) from 2012 to 2016 to determine whether chronological patterns existed in incidence and mortality at our center. Data were obtained from the electronic Cardiology STEMI database in UHL. Statistical analysis was performed using the Independent Samples t Test, ANOVA and Pearson's Chi-Squared test...
August 1, 2018: Chronobiology International
Efrem Kentiba, Soumitra Mondal, D Mathivanan, Mala George
The purpose of this study was to compare chronotype preferences of college students from high- and low-altitude backgrounds living in a tropical setting of Ethiopia. Chronotype (morningness-eveningness) is a preference for a given time of day for physical or mental activities. The present cross-sectional study employed Horne and Osteberg Morningness-Eveningness Questionnaires to evaluate chronotype preferences. The chronotype preference of 264 male college students from varied altitude backgrounds indicated significant differences (p < 0...
August 1, 2018: Chronobiology International
Rohit T Rao, Megerle L Scherholz, Ioannis P Androulakis
Natural glucocorticoids, a class of cholesterol-derived hormones, modulate an array of metabolic, anti-inflammatory, immunosuppressive and cognitive signaling. The synthesis of natural glucocorticoids, largely cortisol in humans, is regulated by the hypothalamic-pituitary-adrenal (HPA) axis and exhibits pronounced circadian variation. Considering the central regulatory function of endogenous glucocorticoids, maintenance of the circadian activity of the HPA axis is essential to host survival and chronic disruption of such activity leads to systemic complications...
July 30, 2018: Chronobiology International
Pedro F S Rodrigues, Paula Vagos, Josefa N S Pandeirada, Patrícia I Marinho, Christoph Randler, Carlos F Silva
This work reports the initial psychometric characterization of the Morningness-Eveningness-Stability-Scale improved (MESSi) for Portuguese young-adults (N = 466). A confirmatory factor analysis confirmed a three-factor model (i.e. Morning Affect, Eveningness and Distinctness) in our data, as originally proposed. Furthermore, construct validity evidence in relation to external variables (i.e. morningness/eveningness and satisfaction with life), as well as adequate reliability (i.e. internal consistency and test-retest reliability), were found...
July 23, 2018: Chronobiology International
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