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\"From street-markets and pop-up shops to art installations and Olympic parks, the temporary use of urban space is a growing international trend in architecture and urban design. Partly a response to economic and ecological crisis, it also claims to offer a critique of the status quo and an innovative way forward for the urban future. Cities in Time aims to explore and understand the phenomenon, offering a first critical and theoretical evaluation of temporary urbanism and its implications for the present and future of our cities. The book argues that temporary urbanism needs to be understood within the broader context of how different concepts of time are embedded in the city. In any urban place, multiple, discordant and diverse timeframes are at play - and the chapters here explore these different conceptions of temporality, their causes and their effects. Themes explored include how institutionalised time regulates everyday urban life, how technological and economic changes have accelerated the city's rhythms, our existential and personal senses of time, concepts of memory and identity, virtual spaces, ephemerality and permanence\"-- Provided by publisher.

Background Time spent in sleep, sedentary behaviour (SB), and physical activity are exhaustive and mutually exclusive parts of a 24-h day that need to be considered in a combination. The aim of this study was to identify validated self-reported tools for assessment of movement behaviours across the whole 24-h day, and to review their attributes and measurement properties. Methods The databases PubMed, Scopus, and SPORTDiscus were searched until September 2023. Inclusion criteria were: (i) published in English language, (ii) per-reviewed paper, (iii) assessment of self-reported time spent in sleep, SB, and physical activity, (iv) evaluation of measurement properties of all estimates across the full 24-h day, and (v) inclusion of adolescents, adults, or older adults. The methodological quality of included studies was assessed using the Consensus-based Standards for the selection of health Measurement Instruments checklist. Results Our search returned 2064 records. After studies selection, we included 16 articles that reported construct validity and/or test-retest reliability of 12 unique self-reported tools – eight questionnaires, three time-use recalls, and one time-use diary. Most tools enable assessment of time spent in sleep, and domain-specific SB and physical activity, and account that sum of behaviours should be 24 h. Validity (and reliability) correlation coefficients for sleep ranged between 0.22 and 0.69 (0.41 and 0.92), for SB between 0.06 and 0.57 (0.33 and 0.91), for light-intensity physical activity between 0.18 and 0.46 (0.55 and 0.94), and for moderate- to vigorous-intensity physical activity between 0.38 and 0.56 (0.59 and 0.94). The quality of included studies being mostly fair-to-good. Conclusions This review found that only a limited number of validated self-reported tools for assessment of 24-h movement behaviours are currently available. Validity and reliability of most tools are generally adequate to be used in epidemiological studies and population surveillance, while little is known about adequacy for individual level assessments and responsiveness to behavioural change. To further support research, policy, and practice, there is a need to develop new tools that resonate with the emerging 24-h movement paradigm and to evaluate measurement properties by using compositional data analysis. Systematic review registration PROSPERO CRD42022330868.

Objective This study examines the relationship between telecommuting and gender inequalities in parents' time use at home and on the job before and during the COVID‐19 pandemic. Background Telecommuting is a potential strategy for addressing the competing demands of work and home and the gendered ways in which they play out. Limited evidence is mixed, however, on the implications of telecommuting for mothers' and fathers' time in paid and unpaid work. The massive increase in telecommuting due to COVID‐19 underscores the critical need to address this gap in the literature. Method Data from the 2003–2018 American Time Use Survey (N = 12,519) and the 2020 Current Population Survey (N = 83,676) were used to estimate the relationship between telecommuting and gender gaps in parents' time in paid and unpaid work before and during the pandemic. Matching and quasi‐experimental methods better approximate causal relationships than prior studies. Results Before the pandemic, telecommuting was associated with larger gender gaps in housework and work disruptions but smaller gender gaps in childcare, particularly among couples with two full‐time earners. During the pandemic, telecommuting mothers maintained paid work to a greater extent than mothers working on‐site, whereas fathers' work hours did not differ by work location. Conclusion In the context of weak institutional support for parenting, telecommuting may offer mothers a mechanism for maintaining work hours and reducing gender gaps in childcare, while exacerbating inequalities in housework and disruptions to paid work.

Abstract Introduction Sleep hygiene recommendations discourage eating close to bedtime, though published data on the impact are not consistent. Associations between eating or drinking, within 1-hour prior to bedtime, sleep duration and sleep fragmentation were examined in a nationally-representative sample. Methods Data from the American Time Use Survey (ATUS), administered to a nationally representative sample of n=201,151 US residents aged ≥15 years were utilized. In an annual phone interview, ATUS participants were asked to record their activities during a 24-hour period (04:00am to 04:00am on the interview day) and were randomly selected to report weekdays or weekend activities. The present analysis included data from 2003–2018 and restricted to weekday respondents (n=124,242). Reporting of eating/drinking activities within 1-hour prior to bedtime was considered as a dichotomous variable (yes/no). Sleep fragmentation was defined as any awakening during the primary sleep episode (yes/no). Linear and logistic regression models, adjusted for age, sex, cohabitation, education and employment, were used to examine associations between eating/drinking and sleep duration or sleep fragmentation. Results In this ATUS sample, 56% of respondents were female and the mean age was 45 years. Mean sleep duration was 8.02 (0.007) hours, and 6% of survey participants ate/drank within 1-hour prior to bedtime. Overall, eating/drinking within 1-hour prior to bedtime was associated with longer sleep duration (p<0.01). Women and men who ate/drank within 1-hour prior to bedtime, in comparison to those who did not, had 35 minutes and 26 minutes longer sleep duration (p- value<0.0001) Eating/drinking activities within 1-hour prior to bedtime were associated with 1.8 higher odds of fragmented sleep (p<0.001). Conclusion In this large population-based survey, weekday eating or drinking within 1-hour prior to bedtime was associated with sleep fragmentation and longer sleep duration. Causal pathways would be difficult to discern, though sleep fragmentation could lead to compensatory increases in sleep duration. Support None

Abstract Study Objectives Bedtime procrastination (BP) is defined as going to bed later than intended despite absence of external reasons. This study investigated sleep and psychological factors associated with BP in young adults, and further compared how high and low BP groups spend their time over 24 h and also 3 h prior to bedtime using time use surveys. Methods Young adults (N = 106) from the community were classified as either high (n = 54) or low (n = 52) BP group based on the Bedtime Procrastination Scale. All participants were asked to complete questionnaires on insomnia, depression, anxiety, stress, and chronotype, in addition to keeping a 7-day sleep diary and completing time use surveys over 48 h. Results Participants were 61.3% female, mean age 22.7 (±2.89) years old. Individuals in the high BP group reported significantly more depression, anxiety, and insomnia, went to bed later, woke up later, and had more eveningness tendencies compared to the low BP group. Results from the time use surveys revealed that the high BP group spent significantly more time engaging in leisure and social activity with the majority of time spent using media over 24 h compared to the low BP group. Finally, the high BP group spent on average approximately 451% (or 61 min) more time per day on their smartphone 3 h prior to bedtime compared to the low BP group. Conclusions Our results suggest that BP is negatively associated with sleep and mood, and should be considered a serious health-interfering behavior.

Sleep, sedentary behaviour (SB), and physical activity are among key behavioural determinants of health. There is a need to evaluate questionnaires that capture movement behaviours across the full 24-h day. The aim of this study was to examine the measurement properties of the Daily Activity Behaviours Questionnaire (DABQ), a novel questionnaire (with a past seven-day recall period) for estimating the time spent in sleep, SB, light physical activity (LPA), and moderate-to-vigorous physical activity (MVPA) among adults. A sample of 126 adults was recruited. DABQ was administered to the participants on two occasions seven days apart to examine its test-retest reliability. The convergent validity of DABQ estimates was explored against activPAL4 accelerometer/inclinometer estimates. Intraclass correlation coefficients for absolute agreement and consistency between the times spent in sleep, SB, LPA, and MVPA estimated by DABQ in the test and re-test ranged from 0.59 to 0.69. Spearman’s correlations between the times spent in sleep, SB, LPA, and MVPA estimated by DABQ and activPAL4 ranged from 0.38 to 0.66. In terms of reliability and validity, DABQ is comparable with existing questionnaires; however, it has an important advantage of enabling a comprehensive assessment of all four 24-h movement behaviours. The measurement properties of DABQ make it suitable for large-scale epidemiological studies on 24-h movement behaviours.

Las mujeres han desempeñado un rol fundamental en la construcción de tramas comunitarias a partir de la colectivización de los trabajos de cuidado. El objetivo de este estudio es contribuir a la conceptualización de los cuidados comunitarios, reconociendo su importancia en los procesos de sostenibilidad de la vida y los impactos en el uso del tiempo, principalmente, de las mujeres. Con esa finalidad se discuten algunas conceptualizaciones de cuidados comunitarios presentes en la bibliografía especializada. La discusión se nutre de la revisión de 32 artículos académicos y del análisis de su consideración en diferentes encuestas de uso del tiempo a nivel internacional, con énfasis en la región latinoamericana. Así, se identifican cuatro aspectos comunes que permiten caracterizar conceptualmente los cuidados comunitarios y se concluye que la gestión del tiempo en relación con las particularidades socioterritoriales articula la noción de cuidado comunitario y le aporta mayor complejidad. Finalmente, se presentan algunas recomendaciones y consideraciones relevantes para nutrir futuras mediciones del uso del tiempo.

Using time diary evidence on change in the frequency and distribution of activities from UK time diary data over the 15 years from the turn of the 21st century, we assess whether the thesis of ‘the speed-up society’ is manifested in an increase in time intensity in people’s daily lives. Comparing indictors like time fragmentation, multitasking and ICT use, to respondents’ reports of how rushed they normally feel, we find no evidence that time pressure is increasing, or that ICT use is associated with greater feelings of time pressure. Rather, we find consistent cross-sectional differentials in our measures of time intensity by gender and occupational status, supporting the idea of relative stasis in the underlying social inequalities of time. These findings are consistent with previous research based on time use data, and we pose them as a challenge to theories of societal speed-up.

ObjectiveTo improve classification of movement behaviours in free-living accelerometer data using machine-learning methods, and to investigate the association between machine-learned movement behaviours and risk of incident cardiovascular disease (CVD) in adults.MethodsUsing free-living data from 152 participants, we developed a machine-learning model to classify movement behaviours (moderate-to-vigorous physical activity behaviours (MVPA), light physical activity behaviours, sedentary behaviour, sleep) in wrist-worn accelerometer data. Participants in UK Biobank, a prospective cohort, were asked to wear an accelerometer for 7 days, and we applied our machine-learning model to classify their movement behaviours. Using compositional data analysis Cox regression, we investigated how reallocating time between movement behaviours was associated with CVD incidence.ResultsIn leave-one-participant-out analysis, our machine-learning method classified free-living movement behaviours with mean accuracy 88% (95% CI 87% to 89%) and Cohen’s kappa 0.80 (95% CI 0.79 to 0.82). Among 87 498 UK Biobank participants, there were 4105 incident CVD events. Reallocating time from any behaviour to MVPA, or reallocating time from sedentary behaviour to any behaviour, was associated with lower CVD risk. For an average individual, reallocating 20 min/day to MVPA from all other behaviours proportionally was associated with 9% (95% CI 7% to 10%) lower risk, while reallocating 1 hour/day to sedentary behaviour from all other behaviours proportionally was associated with 5% (95% CI 3% to 7%) higher risk.ConclusionMachine-learning methods classified movement behaviours accurately in free-living accelerometer data. Reallocating time from other behaviours to MVPA, and from sedentary behaviour to other behaviours, was associated with lower risk of incident CVD, and should be promoted by interventions and guidelines.

Objective This study examines whether—and if so how—gender composition of children matters for mothers' and fathers' well‐being during parenting activities. Background Despite that parents interact with girls and boys differently and spend different amounts of time with them, scholars have paid little attention to how gender composition of children matters for parental well‐being. Method The study assessed parental well‐being during time spent with children, across four measures of subjective well‐being (N = 16,140 activities, 8,621 parents), pooled across three survey waves (2010, 2012, and 2013) from the American Time Use Survey Well‐being Module. Random intercept models were used to account for the multilevel structure of the data. Results For both mothers and fathers, gender composition of children was not associated with different levels of happiness or meaning while parenting. However, fathers reported greater stress parenting all girls and mixed‐gender children (i.e., girl/s and boy/s at the same time) compared to parenting all boys. Mothers reported greater fatigue and stress parenting all girls, compared to parenting all boys. Controlling for activity type explained some of the stress patterns. Conclusion This study, which is contextualized in broader literature on gender stereotypes, interactional processes, and time‐use, makes several contributions to research on gender, family, and health and identifies an important factor—gender composition of children—that helps shape mothers' and fathers' well‐being while parenting.