scholarly journals Magnitude and determinants of change in objectively-measured physical activity, sedentary time and sleep duration from ages 15 to 17.5y in UK adolescents: the ROOTS study

2015 ◽  
Vol 12 (1) ◽  
Author(s):  
Paul J Collings ◽  
Katrien Wijndaele ◽  
Kirsten Corder ◽  
Kate Westgate ◽  
Charlotte L Ridgway ◽  
...  
Keyword(s):  
Physical Activity ◽  
Sleep Duration ◽  
Sedentary Time ◽  
Objectively Measured ◽  
Objectively Measured Physical Activity

scholarly journals Associations between objectively measured physical activity, sedentary behaviour and time in bed among 75+ community-dwelling Danish older adults

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Li-Tang Tsai ◽  
Eleanor Boyle ◽  
Jan C. Brønd ◽  
Gry Kock ◽  
Mathias Skjødt ◽  
...  
Keyword(s):  
Physical Activity ◽  
Older Adults ◽  
Sedentary Behavior ◽  
Sedentary Behaviour ◽  
Sleep Duration ◽  
Activity Level ◽  
Time In Bed ◽  
Objectively Measured ◽  
Objectively Measured Physical Activity ◽  
Vector Magnitude

Abstract Background Older adults are recommended to sleep 7–8 h/day. Time in bed (TIB) differs from sleep duration and includes also the time of lying in bed without sleeping. Long TIB (≥9 h) are associated with self-reported sedentary behavior, but the association between objectively measured physical activity, sedentary behavior and TIB is unknown. Methods This study was based on cross-sectional analysis of the Healthy Ageing Network of Competence (HANC Study). Physical activity and sedentary behaviour were measured by a tri-axial accelerometer (ActiGraph) placed on the dominant wrist for 7 days. Sedentary behavior was classified as < 2303 counts per minute (cpm) in vector magnitude and physical activity intensities were categorized, as 2303–4999 and ≥ 5000 cpm in vector magnitude. TIB was recorded in self-reported diaries. Participants were categorized as UTIB (usually having TIB 7–9 h/night: ≥80% of measurement days), STIB (sometimes having TIB 7–9 h/night: 20–79% of measurement days), and RTIB (rarely having TIB 7–9 h/night: < 20% of measurement days). Multinominal regression models were used to calculate the relative risk ratios (RRR) of being RTIB and STIB by daily levels of physical activity and SB, with UTIB as the reference group. The models were adjusted for age, sex, average daily nap length and physical function. Results Three hundred and fourty-one older adults (median age 81 (IQR 5), 62% women) were included with median TIB of 8 h 21 min (1 h 10 min)/day, physical activity level of 2054 (864) CPM with 64 (15) % of waking hours in sedentary behavior. Those with average CPM within the highest tertile had a lower RRR (0.33 (0.15–0.71), p = 0.005) for being RTIB compared to those within the lowest tertile of average CPM. Accumulating physical activity in intensities 2303–4999 and ≥ 5000 cpm/day did not affect the RRR of being RTIB. RRR of being RTIB among highly sedentary participants (≥10 h/day of sedentary behavior) more than tripled compared to those who were less sedentary (3.21 (1.50–6.88), p = 0.003). Conclusions For older adults, being physically active and less sedentary was associated with being in bed for 7–9 h/night for most nights (≥80%). Future longitudinal studies are warranted to explore the causal relationship sbetween physical activity and sleep duration.

scholarly journals Differences in the Physical Activity, Sedentary Time, and BMI of Finnish Grade 5 Students

2019 ◽  
Vol 16 (9) ◽  
pp. 765-771
Author(s):  
Kasper Salin ◽  
Mikko Huhtiniemi ◽  
Anthony Watt ◽  
Harto Hakonen ◽  
Timo Jaakkola
Keyword(s):  
Physical Activity ◽  
Leisure Time ◽  
Sedentary Time ◽  
Normal Weight ◽  
Fifth Grade ◽  
Overweight Children ◽  
Fifth Grade Students ◽  
Grade 5 ◽  
Objectively Measured ◽  
Objectively Measured Physical Activity

Background: This study examined the distribution of objectively measured physical activity (PA) and sedentary time of fifth-grade students during school, leisure time, and physical education (PE) classes. Demographic, anthropometric, and PA data were collected from 17 representative Finnish schools. Methods: To estimate the PA and sedentary time, participants (N = 592) wore wGT3X-BT ActiGraphs for 7 consecutive days. Comparisons were made between genders and different BMI groups. Results: From the study sample, 43.7% met the moderate to vigorous PA (MVPA) guidelines. Participants spent 62.2% of the day sedentary and 8.2% in moderate and vigorous activities. Boys performed more MVPA than girls, and girls were more sedentary during school days. Boys had more MVPA than girls in leisure time, but there were no differences in sedentary time. However, an examination of PA assessed during PE classes revealed no differences between boys and girls. Normal-weight boys engaged in more MVPA than overweight and obese boys. No differences were found for girls. Conclusions: The PA levels differ between different BMI groups in leisure time and during school but not during PE lessons. PA for overweight children should be targeted and compulsory PE time should be increased to achieve the PA guidelines.

scholarly journals Associations of Objectively Measured Physical Activity and Sedentary Time with the Risk of Stroke, Myocardial Infarction or All-Cause Mortality in 70-Year-Old Men and Women: A Prospective Cohort Study

2020 ◽  
Author(s):  
Marcel Ballin ◽  
Peter Nordström ◽  
Johan Niklasson ◽  
Anna Nordström
Keyword(s):  
Physical Activity ◽  
Myocardial Infarction ◽  
Lower Risk ◽  
Sedentary Time ◽  
Moderate Intensity ◽  
Men And Women ◽  
All Cause Mortality ◽  
Objectively Measured ◽  
Incident Cases ◽  
Objectively Measured Physical Activity

Abstract Objective To study the associations of objectively measured physical activity (PA) and sedentary time (ST) with the combined outcome of incident stroke, myocardial infarction (MI) or all-cause mortality in older adults. Methods N = 3343 men and women aged 70 who participated in a health survey between 2012 and 2017 were included. Actigraph GT3X+ accelerometers were used to measure light-intensity PA (LPA), moderate-intensity PA (MPA) and ST for 1 week. Incident cases of cardiovascular disease (CVD) in terms of stroke or MI, and all-cause mortality were identified using national registers. Hazard ratios (HR) and 95% confidence intervals (CI) were estimated using multivariable-adjusted Cox regressions. Results During a mean follow-up of 2.7 years (0.1–5.6), there were 124 events of CVD or all-cause mortality. After adjusting for potential confounders and mediators, every 30-min/day increment in LPA was associated with 11% lower risk of CVD or all-cause mortality (HR 0.89, 95% CI 0.82–0.97), and every 30-min/day increment in MPA was associated with 36% lower risk (HR 0.64, 95% CI 0.48–0.84). Every 1-h/day increment in ST increased the risk of the outcomes by 33% (HR 1.33, 95% CI 1.14–1.56), although there was no significant association among participants who performed ≥ 30 min/day MPA (HR 1.11, 95% CI 0.82–1.50, P = 0.034 for interaction). None of the associations were modified by sex (P > 0.4 for all). Conclusion Objectively measured LPA and MPA are each associated with lower risk of stroke, MI or all-cause mortality in 70-year-old individuals, while ST is associated with increased risk. The greatest risk reduction is observed for MPA, which also appears to attenuate some of the increased risks associated with ST.

scholarly journals Chronotypes and objectively measured physical activity and sedentary time at midlife

2020 ◽  
Vol 30 (10) ◽  
pp. 1930-1938
Author(s):  
Laura Nauha ◽  
Heidi Jurvelin ◽  
Leena Ala‐Mursula ◽  
Maisa Niemelä ◽  
Timo Jämsä ◽  
...  
Keyword(s):  
Physical Activity ◽  
Sedentary Time ◽  
Objectively Measured ◽  
Objectively Measured Physical Activity

scholarly journals Prenatal and birth predictors of objectively measured physical activity and sedentary time in three population-based birth cohorts in Brazil

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Ding Ding ◽  
Gregore I. Mielke ◽  
Inacio Crochemore M. Silva ◽  
Fernando C. Wehrmeister ◽  
Bernardo L. Horta ◽  
...  
Keyword(s):  
Physical Activity ◽  
Sedentary Time ◽  
Population Based ◽  
Birth Cohorts ◽  
Objectively Measured ◽  
Objectively Measured Physical Activity

Association Between Accelerometer-Measured Physical Activity Intensities and Sedentary Time in 8- to 10-Year-Old Children

2014 ◽  
Vol 26 (1) ◽  
pp. 76-85 ◽  
Author(s):  
Katya M. Herman ◽  
Gilles Paradis ◽  
Marie-Eve Mathieu ◽  
Jennifer O’Loughlin ◽  
Angelo Tremblay ◽  
...  
Keyword(s):  
Public Health ◽  
Physical Activity ◽  
Linear Regression ◽  
Video Game ◽  
Screen Time ◽  
Sedentary Time ◽  
Objectively Measured ◽  
Public Health Strategies ◽  
Objectively Measured Physical Activity ◽  
Daily Total

This study examines the association between objectively-measured physical activity (PA) intensities and sedentary behavior (SED) in a cohort of 532 children aged 8–10 y. PA and SED were assessed by accelerometer over 7-days. Television and computer/video-game use were self-reported. Associations between PA intensities and SED variables were assessed by Spearman correlations and adjusted multiple linear regression. Higher mean daily moderate-to-vigorous and vigorous PA (MVPA, VPA) were negatively associated with mean daily SED (r = −0.47 and −0.37; p < .001), and positively associated with mean daily total PA (r = .58 and 0.46; p < .001). MVPA was also positively associated with light PA (LPA; r = .26, p < .00l). MVPA and VPA were not significantly associated with TV, computer/video or total screen time; accelerometer SED was only weakly associated with specific SED behaviors. On average, for each additional 10 min daily MVPA, children accumulated >14 min less SED, and for each additional 5 min VPA, 11 min less SED. Thus, over the course of a week, higher mean daily MVPA may displace SED time and is associated with higher total PA over and above the additional MVPA, due to concomitant higher levels of LPA. Public health strategies should target both MVPA and SED to improve overall PA and health in children.

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