Human circadian variations

Gentry, Nicholas; Ashbrook, Liza H.; Fu, Ying Hui; Ptáček, Louis J.

doi:10.1172/jci148282

Cited by 62 publications

(46 citation statements)

References 125 publications

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“…Misalignment of the chronotype with the environmental cycle may give rise to circadian disorders. An evening preference has also been associated with numerous psychological and metabolic hazards [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

The association of sleep quality and burnout among Chinese medical residents under standardized residency training in a tertiary hospital

2022

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Purpose To investigate the impact of sleep quality and chronotype on job burnout among medical residents under standardized residency training (SRT) in a tertiary hospital in Beijing, China. Methods Medical residents in the Department of Internal Medicine of Peking Union Medical College Hospital were assessed by Morning and Evening Questionaire-5 (MEQ-5), Pittsburgh sleep quality index (PSQI), and Maslach Burnout Inventory-General Survey (MBI-GS). Factors associated with burnout were analyzed. Results A total of 142 respondents returned completed questionnaires. Burnout was present in 85 (60%) residents. Prevalence of high emotional exhaustion, high depersonalization, and low personal accomplishment were 51%, 28%, and 18%, respectively. The global PSQI score of residents was 5.9 ± 2.4, and the self-reported sleep duration was 6.2 ± 0.8 h/day. The MEQ-5 distribution skewed towards morningness, with a median score of 14.5 [13.0, 16.3]. Poor daytime function significantly predicted emotional exhaustion and depersonalization. Chronotypes were not associated with any of the burnout components. Conclusion Sleep-related daytime dysfunction was strongly related to burnout. Strategies protecting the sleep of residents should be incorporated into the SRT programs for both efficiency and sustainability considerations.

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Section: Introductionmentioning

confidence: 99%

The association of sleep quality and burnout among Chinese medical residents under standardized residency training in a tertiary hospital

2022

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“…Interestingly, the eliminated trends have rarely been objects of interest. Circadian rhythms [ 304 , 305 , 306 ] and phases of ontogenesis [ 307 , 308 , 309 ] have so far been defined largely independent of individuals and widely neglected in connection with motor learning.…”

Section: Discussionmentioning

confidence: 99%

Always Pay Attention to Which Model of Motor Learning You Are Using

Schöllhorn

Rizzi

Slapšinskaitė-Dackevičienė

et al. 2022

IJERPH

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This critical review considers the epistemological and historical background of the theoretical construct of motor learning for a more differentiated understanding. More than simply reflecting critically on the models that are used to solve problems—whether they are applied in therapy, physical education, or training practice—this review seeks to respond constructively to the recent discussion caused by the replication crisis in life sciences. To this end, an in-depth review of contemporary motor learning approaches is provided, with a pragmatism-oriented clarification of the researcher’s intentions on fundamentals (what?), subjects (for whom?), time intervals (when?), and purpose (for what?). The complexity in which the processes of movement acquisition, learning, and refinement take place removes their predictable and linear character and therefore, from an applied point of view, invites a great deal of caution when trying to make generalization claims. Particularly when we attempt to understand and study these phenomena in unpredictable and dynamic contexts, it is recommended that scientists and practitioners seek to better understand the central role that the individual and their situatedness plays in the system. In this way, we will be closer to making a meaningful and authentic contribution to the advancement of knowledge, and not merely for the sake of renaming inventions.

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“…This system, regulated by the solar light and dark cycle, controls vital aspects of our physiology, including body temperature, heart rate, hormone secretion and cellular metabolism. 7 , 35 Therefore, the circadian rhythm plays an essential role in the mature sperm production process. 36–39 Unhealthy sleep habits disrupt the expression of circadian rhythm genes and have adverse effects on the male reproductive system.…”

Section: Discussionmentioning

confidence: 99%

“…In addition to the widely studied unhealthy lifestyle parameters associated with infertility, the short sleep duration and poor sleep quality 6 were proved to be potential risk factors. Sleep is a naturally recurring state that is modulated by the circadian rhythm 7 and homeostatic system. 8 Inadequate sleep duration has been linked to adverse health outcomes, including all-cause mortality, 9 cardiovascular diseases, 10 hypertension, 11 and diabetes.…”

Section: Introductionmentioning

confidence: 99%

Men’s Sleep Quality and Assisted Reproductive Technology Outcomes in Couples Referred to a Fertility Clinic: A Chinese Cohort Study

Du¹,

Zhang²,

Chen³

et al. 2022

NSS

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Background Poor sleep quality has been linked to lower semen quality, but it is unclear whether this result in decreased fertility. To address this question, we retrospectively evaluated the relationship between men’s sleep quality and treatment outcomes in subfertile couples receiving assisted reproductive technology (ART). Patient Enrollment and Methods From September 2017 to November 2019, 282 subfertile couples referred to a Chinese fertility clinic and eligible for ART procedures were enrolled in our study. Sociodemographic characteristics, life habits, and sleep habits in the year prior to ART were recorded. Sleep quality was measured using the Pittsburgh Sleep Quality Index (PSQI). We first divided the patients into two groups based on sleep quality (good sleep: PSQI < 5 and poor sleep: PSQI ≥ 5). Then, the ART outcomes (fertilization rate, good quality embryo rate, implantation rate, positive pregnancy rate, clinical pregnancy rate, live birth rate, miscarriage rate, and birth weight) of each group were analyzed. Finally, multivariate linear and logistic regression analysis were used to examine the relationship between sleep quality (discrete variable or dichotomous variable) and ART outcomes. Results The participants in the poor sleep group showed a lower fertilization rate of 60.13% (543/903) when compared with 67.36% for the good sleep group (902/1339), P < 0.001. The global PSQI score had a significant influence on birth weight (β, −63.81; 95% CI, −119.91- −8.52; P = 0.047), and live birth rate (OR, 0.88; 95% CI, 0.78- 0.99; P = 0.047) after adjusting for the interfering factors. Men’s sleep quality was unrelated to good quality embryos rate, implantation rate, positive pregnancy rate, clinical pregnancy rate, or miscarriage rate. Conclusion Men’s sleep quality was positively associated with fertilization rate, birth weight, and live birth rate among couples undergoing ART.

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Human circadian variations

Cited by 62 publications

References 125 publications

The association of sleep quality and burnout among Chinese medical residents under standardized residency training in a tertiary hospital

The association of sleep quality and burnout among Chinese medical residents under standardized residency training in a tertiary hospital

Always Pay Attention to Which Model of Motor Learning You Are Using

Men’s Sleep Quality and Assisted Reproductive Technology Outcomes in Couples Referred to a Fertility Clinic: A Chinese Cohort Study

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