Circadian variation in coaches' decision-making in the National Football League's evening games.

The aim of this study was to explore whether National Football League (NFL) coaches show variation in their decision-making on fourth down when traveling through time zones. Data from visiting teams in games from 20 seasons (2000-2020) of the NFL were retrieved from online sources ( = 5360 games). Decision-making was measured with the percentage of offensive plays on fourth down.

The relationship between sleep, perfectionistic strivings, perfectionistic concerns, and academic and sports performance in young athletes.

Perfectionism is associated with sleep as well as with academic and sports performance. Given the importance of sleep for performance and the sleep changes that occur during adolescence, the present study aimed to explore the relationship between sleep, two dimensions of perfectionism (perfectionistic strivings and perfectionistic concerns), with academic and sports performance in young athletes. The occurrence of perfectionistic strivings was identified as a tendency to set high personal standards for oneself, while the occurrence of perfectionistic concerns was identified as a tendency to feel pressure to be perfect and have concerns about imperfections.

Research Protocol for Sleep in Families With a Preterm Infant.

Background: Specificities regarding the quality and quantity of sleep of preterm infants and their parents following discharge of the preterm infant from the hospital are not well known. Given this lack of knowledge, the links between the sleep characteristics of these parents, family functioning, and their psychological well-being are also unclear.

Objectives: The purpose of this article is to summarize the research protocol of a cross-sectional, mixed-methods, convergent design study, which aims to evaluate the sleep patterns of preterm infants and both their parents and document the associations between sleep quality, parents' psychological well-being, and family functioning during the posthospitalization period.

Gender differences in the interference of sleep difficulties and daytime sleepiness on school and social activities in adolescents.

Objectives: During adolescence, changes in the circadian and homeostatic systems, combined with psychosocial factors, create a phase delay in the sleep of adolescents. These changes in sleep are associated with increased sleep difficulties and a shortened sleep duration, which has a negative impact on daytime functioning of adolescents. Some studies showed that teenage girls report worse sleep quality and shorter sleep duration than boys during adolescence.

Sleeping through a Lockdown: How Adolescents and Young Adults Struggle with Lifestyle and Sleep Habits Upheaval during a Pandemic.

Objectives: The objective of the present study was to investigate the relationship between chronotype, lifestyle habits during the pandemic, and changes in sleep timing during the first wave of the COVID-19 pandemic in youth.

Method: An online survey of adolescents and young adults (N = 449) was conducted in June 2020. Multivariate hierarchical regressions assessed the contribution of chronotype and changes in lifestyle habits to sleep timing during the COVID-19 pandemic in two age groups (12 to 17 years old and 18 to 25 years old).