Hour Of Sedentary Time Research Articles

Abstract 3413: Physical activity and sedentary behavior of cancer survivors compared to individuals without cancer in NHANES

Abstract INTRODUCTION: Physical activity may improve quality of life and reduce mortality among cancer survivors. As cancer death rates continue to decrease, the population of cancer survivors is expected to grow, therefore making it important to study their health behaviors. Research has been conducted on prevalence of physical activity and sedentary behaviors of survivors of certain cancers, however, little research has been conducted comparing cancer survivors to individuals without cancer. The purpose of this study was to update previously published results from earlier National Health and Nutrition Examination Survey (NHANES) cycles (2007-2010) with more recent data comparing physical activity and sedentary behavior among cancer survivors and individuals without cancer. METHODS: Using the NHANES 2011-2018, we identified 1320 cancer survivors and 19,109 participants without cancer who provided data on recreational, work-related, and transportation-related physical activity and sedentary behavior. The included participants were over 20 years of age, not pregnant at the time of the survey, and were more than three years from their cancer diagnosis, if applicable. Comparisons between cancer survivors and individuals without cancer were conducted for duration of total physical activity (min/day) and sedentary time per day. To account for the complex sampling design, weighted multivariable analysis was used to calculate odds ratios (ORs) and 95% confidence intervals (CIs). RESULTS: Compared to individuals without cancer, cancer survivors reported less average ± standard error physical activity minutes per day (190.06 ± 5.24 and 147.29 ± 13.14, respectively), and slightly more sedentary hours per day (6.95 ± 0.09 and 7.56 ± 0.36, respectively). However, after adjusting for age, race and ethnicity, sex, educational status, body mass index, and smoking status, there was no association between physical activity duration or sedentary time and cancer survivor status. The OR (95%CI) for more than 60 minutes per day of physical activity was 1.00 (0.83, 1.20) compared to no physical activity, and for more than 8 hours of sedentary time per day was 1.00 (0.82, 1.21) compared to less than 5 hours per day. DISCUSSION: In a previous publication of earlier cycles of NHANES (2007-2010), cancer survivors reported higher physical activity but also higher sedentary time per day compared to individuals without cancer. However, these results were not supported in this updated analysis using more recent NHANES cycles (2011-2018). After adjustment for important covariates, we did not find differences between cancer survivors and individuals without cancer in reported physical activity or sedentary time. Further research in other populations is needed to corroborate these findings and document whether they reflect a growing awareness of the negative impact of sedentary behavior in cancer survivorship. Citation Format: Anna Marie Pavy, Susan E. Steck. Physical activity and sedentary behavior of cancer survivors compared to individuals without cancer in NHANES [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2024; Part 1 (Regular Abstracts); 2024 Apr 5-10; San Diego, CA. Philadelphia (PA): AACR; Cancer Res 2024;84(6_Suppl):Abstract nr 3413.

Abstract P221: Association of Posttraumatic Stress Disorder With Physical Activity Among Vietnam-Era Male Twin Veterans

Introduction: Post-traumatic stress disorder (PTSD) can develop after a traumatic event and is associated with cardiovascular diseases (CVDs), but the mechanisms are not clear. Behavioral factors like physical activity (PA) may play a role if associated with PTSD, but few studies have examined whether PTSD may be associated with lower PA. By studying twins, we can examine this relationship and adjust for demographic and shared familial characteristics. Methods: We studied the relationship between current PTSD diagnosis and PA in 146 male twins (73 pairs) from the Emory Twin Study within the Vietnam Twin Registry. Twin pairs were discordant for PTSD symptoms. PA was continuously measured over 7 days using wrist actigraphy and used validated algorithms to calculate daily hours of sedentary time and moderate-to-vigorous PA (MVPA). We also examined self-reported leisure PA score with the Baecke questionnaire. We controlled for familial effect using generalized linear regression within PTSD discordant twin pairs. We dichotomized MVPA based on established cutpoints for normal values and estimated the prevalence ratio (PR) of the likelihood of achieving the minimum recommended average daily MVPA using Poisson regression. Multiple imputation was used to reduce the impact of missing data. Results: Veterans (mean (SD) age: 68.2 (2.1); 97% (142/146) White) had a low prevalence of achieving daily MVPA goals —35% among those with PTSD and 25% among those without and spent over 9 average sedentary hours per day. We did not find any significant relationship between current PTSD diagnosis and any of the PA outcomes in fully adjusted models. Discussion: Our findings reveal low PA and high levels of sedentary behavior among Veterans, with PTSD showing no significant impact on average PA. This suggests that PA is unlikely to explain excess CVD risks that have otherwise been observed in PTSD. Nonetheless, in this cohort of Vietnam era veterans, interventions to increase PA are warranted regardless of PTSD status.

Sedentary Time and Prescription Medication Use Among US Adults: 2017-2018 National Health and Nutrition Examination Survey.

Prescription medication usage has been used as a predictor of disease prevalence and overall health status. Evidence suggests an inverse relationship exists between polypharmacy, which is the use of 5 or more medications, and physical activity participation. However, there is limited evidence examining the relationship between sedentary time and polypharmacy in adults. The aim of this study was to examine the associations between sedentary time and polypharmacy in a large nationally representative sample of US adults. Study sample (N = 2879) included nonpregnant adult (≥20y old) participants from the 2017-2018 National Health and Nutrition Examination Survey. Self-reported minutes per day of sedentary time were converted to hours per day. The dependent variable was polypharmacy (≥5 medications). Analysis revealed that for every hour of sedentary time, there was 4% greater odds of polypharmacy (odds ratio, 1.04; 95% confidence interval, 1.00-1.07, P = .04) after adjusting for age, race/ethnicity, education, waist circumference, and the interaction term between race/ethnicity and education. Our findings suggest increased sedentary time is associated with an increased risk of polypharmacy among a large nationally representative sample of US adults.

Physical activity is associated with adiposity in older adults with HIV in the modern HIV era.

People with HIV (PWH) are aging and are experiencing higher rates of abdominal adiposity. Physical activity is an effective nonpharmacological strategy to reduce adiposity in the general aging population. Yet, the relationship between physical activity and adiposity in people with well controlled HIV is unclear. Our objective was to describe the association between objectively-measured physical activity and abdominal adiposity in PWH. As part of the multisite, observational PROSPER-HIV study, virologically suppressed, adult PWH wore an Actigraph accelerometer for 7-10 days and completed duplicate waist and hip circumference measures. Demographic and medical characteristics were abstracted from the CFAR Network of Integrated Clinical Systems dataset. Descriptive statistics and multiple linear regressions were used to analyze the data. On average, our 419 PWH were 58 years of age [interquartile range (IQR): 50, 64], male (77%), Black (54%), and currently taking an integrase inhibitor (78%). PWH completed a mean of 7.06 (±2.74) days of total actigraphy wear time. They took an average of 4905 (3233, 7140) steps per day and engaged in 5.4 h of sedentary time per day. Controlling for age, sex, employment and integrase inhibitor use, the number of steps taken per day was associated with reduced abdominal adiposity ( F = 3.27; P < 0.001) and the hours of daily sedentary time was associated with increased abdominal adiposity ( F = 3.24; P < 0.001). Greater physical activity is associated with reduced abdominal adiposity in aging PWH. Future work should investigate how to tailor the amount, type and intensity of physical activity needed to reduce adiposity in PWH taking contemporary HIV medication. NCT03790501.

Benefits of leisure-related physical activity and association between sedentary time and risk for hypertension and type 2 diabetes.

Lifestyle modifications can reduce the risk of type 2 diabetes mellitus (T2DM) and hypertension. Our study investigated whether domain-specific physical activity (such as work, transport and leisure) and sedentary behaviour were associated with T2DM and hypertension, and whether these associations were moderated by sex and age. For this cross-sectional study, data were obtained from a population survey in Singapore (n=2,867) conducted from February 2019 to March 2020. T2DM and hypertension were self-reported. Global physical activity questionnaire was used to assess domain-specific physical activity (in metabolic equivalent of task [MET]-minutes) and sedentary time (in hours). Logistic regression models were generated to examine the abovementioned associations, and adjusted for age, sex, education, ethnicity, personal income, body mass index, diet and hypertension/diabetes. Interaction terms were included individually to investigate whether age and sex moderated the associations. Individuals with >826 MET-minutes of leisure-related physical activity per week had lower odds of having T2DM (odds ratio [OR] 0.46, 95% confidence interval [CI] 0.24-0.86) and hypertension (OR 0.59, 95% CI 0.37-0.94) than those with no leisure-related physical activity. Individuals with >8 hours of sedentary time daily had higher odds of having hypertension (OR 1.69, 95% CI 1.06-2.69) than those with 0-5 hours of sedentary time. Logistic regression models including interaction terms showed that the association between leisure-related physical activity and hypertension was significant for those aged 18-34 (OR 0.15, 95% CI 0.03-0.66) and 50-64 years (OR 0.44, 95% CI 0.21-0.91). The association between sedentary time and hypertension was significant for those aged 18-34 years (OR 15.07, 95% CI 1.69-133.92). Our results support the widespread promotion of an active lifestyle to lower the prevalence of diabetes and hypertension in Singapore.

Accelerometer-measured physical activity and sedentary behavior in nonagenarians: Associations with self-reported physical activity, anthropometric, sociodemographic, health and cognitive characteristics.

Research on device-based physical activity in the oldest-old adults is scarce. We examined accelerometer-measured physical activity and sedentary behavior in nonagenarians. We also investigated how the accelerometer characteristics associate with nonagenarians' self-reported physical activity, anthropometric, sociodemographic, health and cognitive characteristics. Nonagenarians from a population-based cohort study (N = 38, mean age 91.2) used accelerometers during the waking hours for seven days. They also participated in a health survey and cognitive telephone interview. The Wald test and Pearson and polyserial correlations were used to analyze the data. The participants' average day consisted of 2931 steps, 11 minutes of moderate-to-vigorous physical activity and 13.6 hours of sedentary time. Physical activity bouts less than 3 minutes per day and sedentary time bouts of 20-60 minutes per day were the most common. No sex differences were found. Many accelerometer-measured and self-reported physical activity characteristics correlated positively (correlations ≥0.34, p-values <0.05). The low levels of many accelerometer-measured physical activity characteristics associated with low education (correlations ≥0.25, p-values <0.05), dizziness (correlations ≤-0.42, p-values <0.01) and fear of falling (correlations ≤-0.45, p-values <0.01). Fear of falling was also associated with accelerometer-measured sedentary behavior characteristics (correlations -0.42 or ≥0.43). Nonagenarians were mostly sedentary and low in physical activity, but individual variability existed. Accelerometer-measured and self-reported physical activity had a good consistency. Education, dizziness and fear of falling were consistently related to accelerometer-measured characteristics in nonagenarians.

Daily sedentary time of less than six hours is beneficial for the prevention of obesity in US adults

With suggestions that limiting sedentary time can prevent obesity, the need to identify a cut-off point for daily sedentary time is being recognized. Therefore, this study aims to examine the dose-response relationship between daily sedentary time and obesity and to suggest a cutoff of daily sedentary time for the prevention of obesity. Data from the 2003 to 2006 National Health and Nutrition Examination Survey (NHANES) were analyzed. A total of 5,127 adults (&gt;19 years old) were included in the present study. Accelerometers were used to measure the daily sedentary time. Five sub-groups were created according to daily sedentary hours (e. g., &lt;6 hours, 6 hours [i. e., 6 hours–6 hours and 59 minutes], 7 hours, 8 hours, or ≥9 hours). Obesity status was classified by body fat percentage measured by Dual-energy X-ray absorptiometry (DEXA). Logistic regression was used to examine the association between sedentary time and obesity after controlling for covariates. Participants who spent &lt;6 hours of sedentary time were less likely to be obese (OR=0.61; 95% CI: 0.43, 0.86) compared to those who spent sedentary time of ≥9 hours. We found that 6 hours can be suggested as a viable threshold for the prevention of obesity in US adults.

Sedentary Time And Prescription Medication Use In United States Adults: 2017-2018 NHANES

Prescription medication usage has been used as a predictor of disease prevalence and overall health status. Evidence suggests a deleterious relationship exists between increased medication usage and physical activity participation. However, there is limited evidence examining the relationship between sedentary time and increased prescription medication usage in adults. PURPOSE: Examine the associations between sedentary time and increased prescription medication usage in a large nationally representative sample of U.S. adults. METHODS: Study sample (n=3,063) included non-pregnant adult (≥ 20 years old) participants in the 2017-2018 National Health and Nutrition Examination Survey. Self-reported minutes per day of sedentary time were converted to hours per day of sedentary time. The dependent variable was increased medication usage (≥ 5 medications). Logistic regression analysis was adjusted for age, race, and education level. RESULTS: Analysis revealed that for every hour of sedentary time, there was a 5% greater odds of increased medication usage (Odds Ratio 1.05; 95% Confidence Interval 1.01-1.08, P-value=0.0144). A significant positive dose-response relationship was seen between sedentary time and prescription medication use (P for trend <0.0001). CONCLUSIONS: Our findings suggest increased sedentary time is associated with increased prescription medication usage among a large nationally representative sample of U.S. adults.

542-P: Determinants of Objectively Measured Physical Activity in Chinese Immigrants in the U.S. with Prior Gestational Diabetes

Background: Women with prior gestational diabetes (GD) have times the risk of developing type 2 diabetes (T2D) as women without prior GD. Chinese immigrants in the US are disproportionately affected by GD and T2D. Physical activity (PA) is a modifiable lifestyle strategy to reduce the risk of T2D. The aim of this study was to identify health beliefs, cultural, and psychosocial determinants of objectively-measured PA among Chinese immigrants in the US with prior GD. Methods: We conducted a cross-sectional study among 1Chinese immigrants with prior GD (6 months to 5 years postpartum) across the US, recruited primarily via WeChat. PA was measured by GT9X+ hip accelerometers for 7 consecutive days. Validated questionnaires in English and Chinese were used to assess health beliefs, cultural, and psychosocial characteristics. Descriptive, bivariate, and multiple regression analyses were performed to identify factors associated with PA levels. Results: The mean age of participants was 34.3±3.7 years, and mean body mass index was 21.7±2.6 kg/m2. Mean daily steps were 5912±2139. Only 28% met the PA guidelines of ≥150 minutes of moderate- to vigorous- physical activity (MVPA) per week. The duration of MVPA per week was 86 [IQR 39- 152] minutes. Participants had an average of 9.2±1.4 hours of sedentary time per day, which was about 64.7±7.8% of the total wear time. In the final adjusted model, participants who had higher acculturative stress [-0.25 (SE=0.14) , p=.006], were not living with parents [-0.21 (SE=0.22) , p=.020], had no knowledge of PA guidelines [-0.18 (SE=0.17) , p=.039], and had an annual household income of &amp;lt; $60K [-0.21 (SE=0.23) , p=.025] were had fewer MVPA minutes per week. Conclusion and implication: Strategies are needed to increase MVPA among this high-risk group, including decreasing acculturative stress and increasing knowledge of PA guidelines. The findings from this study will inform the development of culturally-sensitive interventions. Disclosure S.Huang: None. G.I.Ash: None. S.Nam: None. S.Jeon: None. E.Mcmahon: None. R.Whittemore: None. Funding Connecticut Nurses’ Foundation Scholarship Award

Abstract 011: Displacement Of Objectively Measured Sedentary Time With Light Physical Activity Was Associated With A Less Harmful Ectopic Fat Distribution In African Ancestry Men

Introduction: Ectopic fat is an established risk factor for cardiometabolic disorders. Few studies have examined the associations between objectively measured physical activity and ectopic fat depots, with mixed results. Here, we sought to use Isotemporal Substitution Framework to cross-sectionally model the displacement of sedentary time with physical activity and determine its association with simultaneously measured ectopic fat depots among Black Caribbean men from the Tobago Health Study. Hypothesis: Replacing sedentary time with physical activity will be cross-sectionally associated with less abdominal subcutaneous adipose tissue and ectopic adipose tissue around abdominal organs (visceral adipose tissue), and within abdominal muscle (intermuscular adipose tissue), the pericardium, and the liver (measured by liver density, where greater density indicates less fat). Methods: At the 2014-2016 visit, physical activity was assessed using the SenseWear Pro armband (worn for ≥4 days) and categorized as sedentary (&lt;1.5 metabolic equivalents; METs), light activity (≥1.5 to &lt;3.0 METs), or moderate-to-vigorous activity (≥3.0 METs). Computed tomography scans of the chest, abdomen, and liver were used to assess several ectopic fat depots. We used Isotemporal Substitution Framework, a technique to model the time-substitution effects of one physical activity over another, paired with linear regression to examine associations between physical activity and fat depots, separately, while adjusting for age, height, total awake time, and multiple comparisons using a Bonferroni correction. Results: On average, participants (n=271) were 63 years old (standard deviation, SD: 8) with a body mass index of 29 kg/m 2 (SD: 5), took 5,440 steps daily (SD: 2,959), and had 11.2 hours of sedentary behavior (SD: 3 hours), 4.5 hours of light physical activity (SD: 2 hours), and 54 minutes of moderate-to-vigorous physical activity per day (SD: 52 mins). Replacing 1 hour of sedentary time with light physical activity was cross-sectionally associated with 0.25 SD lower abdominal subcutaneous fat, 0.22 SD lower abdominal visceral fat, 0.10 SD lower abdominal intermuscular fat, 0.17 SD lower pericardial fat, and 0.14 SD higher liver density (i.e., less liver fat; all p-values≤0.001). Whereas, replacing sedentary time or light physical activity with moderate-to-vigorous physical activity were not significantly associated with adipose tissue in any depots. Conclusion: The displacement of sedentary time with light physical activity was significantly associated with a less harmful distribution of ectopic fat among this cohort of Black Caribbean men ages 50-89. Interventions focused on increasing light physical activity, rather than higher intensity activities, throughout the day may be more successful at reducing harmful ectopic adiposity since they may be easier to adhere to and maintain.

A randomized controlled trial of a community-based obesity intervention utilizing motivational interviewing and community resource mobilization for low-income families: Study protocol and baseline characteristics

Low-income, racially diverse families with one parent with obesity are at high risk for child obesity. Effective approaches to promote healthy behaviors and prevent additional weight gain in family members are needed. Motivational interviewing (MI) may assist families to engage, identify motivations for change and establish goals. However, families with limited resources face other barriers to goal achievement that may be addressed through connection with community organizations. This paper describes a unique protocol combining MI and community connection. This randomized controlled trial includes low-income families with one parent with obesity and at least one child aged 6 to 12 years. Families in the intervention group receive an innovative, 12-month intervention combining health coaching using MI to promote lifestyle behavior change goals and community resource mobilization to assist with basic needs and resources to aid goals. The study protocol is modeled on community-based participatory research principles. Data is collected at baseline, 6 months, 12 months, and 18 months include questionnaires, body measurements, and accelerometer data. For adults, primary outcomes are Body Mass Index (BMI), minutes of moderate to vigorous physical activity (MVPA), and hours of sedentary time per day. For children, primary outcomes are sedentary time, MVPA, and the Family Nutrition and Physical Activity Score. From this hard-to-reach population, 236 diverse families were recruited. If the study is deemed effective, it has the potential to demonstrate that the combination of MI, resource mobilization, and utilization of existing community organizations is a sustainable model to assist families at risk for obesity.

Abstract 11289: Sedentary Time in Uganda: Influence of Sex and HIV Status and Associations with Atherosclerotic Cardiovascular Disease Risk

Introduction: Sub-Saharan Africa (SSA) is disproportionately impacted by HIV and HIV-related atherosclerotic cardiovascular disease (ASCVD). Since physical activity may prevent ASCVD events, it is important to understand how physical activity and inactivity relate to ASCVD risk among men and women with and without HIV in SSA. Methods: One hundred people with HIV (PWH) and 100 people without HIV (PWOH) matched by age and sex were enrolled into this observational study in Kampala, Uganda. Physical activity was objectively measured by actigraphy for 7 days, including steps per day, light activity time, moderate-to-vigorous activity time and sedentary time. ASCVD risk was assessed using the pooled-cohort equations. Coronary artery disease was quantified by cardiac computed tomography angiography. Multivariable linear and logistic regression models were used to determine the relationship between physical activity, ASCVD risk, and subclinical coronary disease. Results: Median age was 57 years; 63% were female and median ASCVD risk score was 7.9%. All PWH were on antiretroviral therapy and 86% had undetectable HIV viral load. Physical activity patterns were similar by HIV status (all p&gt;0.2). Compared to males, females took more steps per day ( p =0.001) and engaged in more light activity time ( p &lt;0.001), but less moderate-to-vigorous activity time ( p &lt;0.001). Sedentary time was similar by HIV status and sex (both p&gt;0.8). After adjusting for moderate-to-vigorous activity time, sedentary time remained positively associated with ASCVD risk (standardized β=0.334, p &lt;0.001). In stratified models, sedentary time was associated with ASCVD risk in females (β=0.258, p =0.028) but not males (p=0.194) and in PWOH (β=0.430, p=0.001) but not PWH (p=0.380). Sedentary time was associated with the presence of coronary artery disease plaque, even after adjustment for ASCVD risk score (adjusted OR= 1.039 per hour of sedentary time, p =0.018). Conclusions: Sedentary time is strongly associated with atherosclerotic cardiovascular disease risk in Uganda, particularly among females, but less so among PWH. Future studies should consider the influence of sex and HIV status while developing targeted strategies to improve physical activity and reduce sedentary time.

Association Between Excess Leisure Sedentary Time and Risk of Stroke in Young Individuals.

The association between physical activity (PA) and lower risk of stroke is well established, but the relationship between leisure sedentary time and stroke is less well studied. We used 9 years of the Canadian Community Health Survey between 2000 and 2012 to create a cohort of healthy individuals without prior stroke, heart disease, or cancer. We linked to hospital records to determine subsequent hospitalization or emergency department visit for stroke until December 31, 2017. We quantified the association between self-reported leisure sedentary time (categorized as <4, 4 to <6, 6 to <8, and 8+ hours/day) and risk of stroke using Cox regression models and competing risk regression, assessing for modification by PA, age, and sex and adjusting for demographic, vascular, and social factors. There were 143 180 people in our cohort and 2965 stroke events in follow-up. Median time from survey response to stroke was 5.6 years. There was a 3-way interaction between leisure sedentary time, PA, and age. The risk of stroke with 8+ hours of sedentary time was significantly elevated only among individuals <60 years of age who were in the lowest PA quartile (fully adjusted hazard ratio, 4.50 [95% CI, 1.64–12.3]). The association was significant across multiple sensitivity analyses, including adjustment for mood disorders and when accounting for the competing risk of death. Excess leisure sedentary time of 8+ hours/day is associated with increased risk of long-term stroke among individuals <60 years of age with low PA. These findings support efforts to enhance PA and reduce sedentary time in younger individuals.

Factors Influencing Health-related Quality of Life according to Sitting-time of Elders Living Alone: Data from the 7th Korea National Health and Nutrition Examination Survey (2016~2018)

Purpose: The purpose of this study was to identify factors influencing health-related quality of life depending on time sitting by elders living alone.Methods: This was a secondary data analysis study of the 7th Korea Health and Nutrition Examination Survey (2016~2018). The participants in the study were 1,499 elderly people living alone who were 65 years of age or older.Results: The average time sitting for elders living alone was 8.93 hours. If they had more than eight hours of sedentary time, their physical and psychological health conditions and quality of life were lower than those in the group that had less than 8 hours. The factors influencing quality of life were age, household income, central obesity, and subjective health status for elders with sitting-time within 8 hours (R2=.28, p&lt;.001), and household income, economic activity, and subjective health status in elders with sitting-time over 8 hours (R2=.33, p&lt;.001).Conclusion: There were differences in factors affecting the quality of life depending on the length of sitting-time for elders living alone. Depending on the length of sitting-time, it is necessary to establish nursing interventions to promote physical and psychological health to improve the quality of life of elders living alone.

Post-secondary students' adherence to the Canadian 24-Hour Movement Guidelines for Adults: Results from the first deployment of the Canadian Campus Wellbeing Survey (CCWS).

New Canadian 24-Hour movement guidelines for adults recommend several hours of light physical activity each day, 150 minutes/week of moderate-to-vigorous physical activity (MVPA) including muscle strengthening activities at least twice a week, no more than 8 hours of sedentary time and 3 hours of recreational screen time each day, and 7 to 9 hours of sleep each night. This study examines post-secondary student adherence to the guidelines and its associations with sociodemographic factors and mental health. We analyzed data from a sample of 20 090 post-secondary students in Canada who participated in the 2019-2020 Canadian Campus Wellbeing Survey (CCWS). Prevalence of meeting guidelines for physical activity, sedentary time, recreational screen time and sleep were examined. We conducted logistic regression to examine associations between meeting movement guidelines and sociodemographic factors and mental health outcomes. Only 9.9% of students (females 10.4%; males 9.2%) were currently achieving four components of the 24-hour movement guidelines. Respondents most commonly adhered to MVPA (61.1%) and sleep (59.7%) guidelines. Adherence to sedentary and screen time guidelines was lower (56.3% and 36.2%, respectively). Sociodemographic factors associated with higher odds of meeting the guidelines included being female, older age, self-identifying as White, and living at high socioeconomic status. Students who reported higher psychological well-being were more likely to meet the guidelines. Overall adherence to the new guidelines is low among post-secondary students in Canada. The CCWS provides a mechanism for monitoring the dissemination and implementation of the new Canadian 24-hour movement guidelines for adults.

Sleep is Inversely Associated with Sedentary Time among Youth with Obesity.

Objective: Pathways underlying the sleep-obesity relationship in youth are poorly understood. In this study, we examined associations of sleep with sedentary time and moderate-to-vigorous physical activity (MVPA) among youth, stratified by weight category (obesity versus no obesity). A sub-aim examined whether controlling for screen time changed the sleep-sedentary time association. Methods: Methods entailed secondary analysis of baseline data collected June-August 2014-2017 during a school-based healthy weight management trial in Minneapolis/St. Paul, Minnesota. Participants (N = 114) were 8-to-12 years old with BMI ≥ 75th percentile, most of whom were members of racial/ethnic minority groups (57%) or from households receiving economic assistance (55%). Mean nightly sleep duration and daily screen time were measured by survey, MVPA and sedentary time by accelerometer, and height and weight by research staff. Multivariate linear regression examined associations of sleep with sedentary time and MVPA. Results: Sleep was inversely associated with hours of sedentary time (β = -1.34 [-2.11, -0.58] p = .001) and percent of time spent sedentary (β = -2.92 [-4.83, -1.01], p = .004), for youth with obesity only. The association was unchanged by screen time. Sleep was not significantly associated with MVPA in total sample or stratified models. Conclusions: Associations among sleep, activity levels, and obesity may differ based upon movement type (sedentary time vs MVPA) and weight category (obesity vs no obesity).

Association of sedentary time with blood pressure in women of reproductive age.

While the beneficial impact of moderate-vigorous physical activity (MVPA) on blood pressure is well-understood, the relationship between sedentary time (ST) and blood pressure is less clear. We aimed to evaluate the associations between ST and BP in reproductive-age women. This cross-sectional analysis consisted of 431 women enrolled in the Placenta as a Window to Maternal Microvascular Disease Risk study at Magee-Womens Hospital. Blood pressure and self-reported physical activity and ST were collected 8–10 years after delivery at study enrollment. Logistic and linear regression models examined associations between ST and blood pressure and adjusted for MVPA. Women with the highest amount of ST were less likely to be normotensive and more likely to have elevated blood pressure and Stage II hypertension (p = 0.02). Each additional hour of ST was associated with an increased risk of Stage II hypertension (OR 1.12 [1.01–1.24]) and higher systolic blood pressure (0.45 mmHg [0.08–0.82]), diastolic blood pressure (0.29 mmHg [0.02–0.56]), and mean arterial pressure (0.34 mmHg [0.05–0.63]), after adjustment for covariates. This relationship was more apparent in women who participated in less MVPA (bottom 50th percentile) versus more MVPA (top 50th percentile). ST is associated with higher blood pressure, particularly in women who engage in less aerobic activity, and could serve as an important intervention target for reducing blood pressure and hypertension during the reproductive years.

Mental Health Disorders and Associated Risk Factors in Quarantined Adults During the COVID-19 Outbreak in China: Cross-Sectional Study.

BackgroundPeople undergoing mass home- and community-based quarantine are vulnerable to mental health disorders during outbreaks of coronavirus disease (COVID-19), but few studies have evaluated the associated psychosocial factors.ObjectiveThis study aimed to estimate the prevalence of anxiety and depressive symptoms and identify associated demographic and psychosocial factors in the general Chinese population during the COVID-19 pandemic quarantine period.MethodsParticipants aged 18 years or above were recruited in a cross-sectional online survey using snowball sampling from February 26-29, 2020. The survey included questions on demographics, family relationships, chronic diseases, quarantine conditions, lifestyle, COVID-19 infection, and anxiety and depressive symptoms. Logistic regression analyses were conducted to identify factors associated with elevated anxiety or depressive symptoms.ResultsOut of 2331 participants, 762 (32.7%) experienced elevated anxiety or depressive symptoms. Nine risk factors associated with anxiety or depressive symptoms included younger age, reduced income, having cancer or other chronic diseases, having family members living with cancer, concerns related to COVID-19 infection for themselves or family members, living alone, having family conflicts, having <3 or >8 hours of sedentary time per day, and worsened sleep quality.ConclusionsThe findings highlight an urgent need for psychological support for populations at high risk for elevated anxiety or depressive symptoms during the COVID-19 pandemic.

Are people in the bush really physically active? A systematic review and meta-analysis of physical activity and sedentary behaviour in rural Australians populations.

BackgroundPhysical inactivity is a major risk factor for non-communicable disease and premature mortality. People who live in rural settings are usually regarded as more physically active than those living in urban areas, however, direct comparisons between these populations are scarce. We aimed to summarise the prevalence of physical inactivity and sedentary behaviour in rural settings in Australia, compared to urban counterparts.MethodsWe searched six databases (AMED, Embase, Medline; CINAHL, SPORTDiscus; and RURAL) and identified 28 observational studies that investigated the levels of physical inactivity and/or sedentary behaviour in adults aged 18 years and over in rural Australia. Random effects meta-analysis was used to generate pooled prevalence estimates.ResultsPhysical inactivity was four percentage points (95% confidence interval (CI) = 0.4 to 8) higher in rural populations compared to urban populations. There was a one percentage point (95% CI = -3 to 5) prevalence difference of physical activity in the rural populations. Rural populations reported on average 7.8 hours of sedentary time per day (95% CI = 5 to 10) and the prevalence of high levels of sedentary behaviour (≥to 8 hours per day) was 7% (95% CI = -8 to -7) greater in urban areas compared to rural areas.ConclusionsPeople living in rural areas are just as physically inactive as people who live in urban areas. Our findings challenge the popular views that rural lifestyles result in people engaging more frequently in physical activity. Public health campaigns promoting physical activity in rural settings are just as necessary as in urban settings.

Sedentary Time and Physical Activity Associations Between Child Care Educators and Children

This study examines the associations between objectively measured sedentary time and physical activity among child care educators and children in their direct care and aims to determine if the associations differed between toddlers (aged 19-35 months) and preschoolers (aged 36-60 months). The participants were educators and children from 19 child care centers in Edmonton and Ottawa, Canada, as part of the Supporting Healthy Active Child Care Settings study. Sedentary time, light-intensity physical activity, and moderate to vigorous-intensity physical activity during child care were measured with accelerometers in 2017-2018. Nap time data were removed for children and educators based on room schedules. Children were matched with the main educator in their room that had the highest total physical activity, resulting in 187 children and 38 educators. Multilevel linear regression models with interaction terms were conducted in 2019. Children engaged in 30.0, 23.1, and 6.9 minutes per hour of sedentary time, light-intensity physical activity, and moderate to vigorous-intensity physical activity, respectively. Educators engaged in 33.5, 23.6, and 2.9 minutes per hour of sedentary time, light-intensity physical activity, and moderate to vigorous-intensity physical activity, respectively. No significant interactions were observed, so age-stratified analyses were not conducted. Each additional 5 minutes per hour of educator sedentary time was significantly associated with 0.5 minutes per hour lower child moderate to vigorous-intensity physical activity. Each additional 5 minutes per hour of educator moderate to vigorous-intensity physical activity was significantly associated with 1.3 minutes per hour higher child moderate to vigorous-intensity physical activity. No other significant observations were observed. The educators' sedentary time and moderate to vigorous-intensity physical activity may have a small but potentially meaningful influence on children's moderate to vigorous-intensity physical activity because educators directly care for multiple children. Targeting these educator behaviors may be one strategy to increase children's moderate to vigorous-intensity physical activity during child care.