Minutes Of Vigorous Physical Activity Research Articles

Examining the Relationship Between E-Cigarette Status and Wearable Device Use on Physical Activity Levels in U.S. Adults.

The aim of this analysis is to investigate physical activity levels amongst e-cigarette users based on their wearable device use. Cross-sectional secondary data analysis using 2017 Behavioral Risk Factor Surveillance Survey (BRFSS). Data from the 2017 BRFSS were used. 5,562 U.S. adults (age 18+). Self-reported physical activity related variables from U.S. adults (age 18+). Separate unadjusted and adjusted linear regression models were performed for each of the dependent variables using survey analysis. Non-users of wearable devices and e-cigarettes account for 96.6% (95%CI [95.7, 97.6]) of the sample, whereas users of wearable devices and e-cigarettes account for 3.3% (95%CI [1.2, 5.4]) of the sample. Those who use e-cigarettes participate in almost 50% less vigorous physical activity minutes per week than nonusers, 46 (95%CI [0.43, 91.57]) and 93 (95%CI [80.59, 106.34]) minutes respectively. Individuals who use e-cigarettes and use wearable devices were found to spend significantly more time in total physical activity per week in both the unadjusted and adjusted linear regressions, P = =0.01 and P = =0.04 respectively. The use of e-cigarettes, wearable devices, or both technologies may influence the physical activity levels of its users. Additional research is needed to better understand the association between physical activity levels and the usage of these technologies.

Accelerometry-assessed daily physical activity and compliance with recommendations in Spanish children: importance of physical education classes and vigorous intensity.

Physical activity (PA) is associated with numerous health benefits. Vigorous PA (VPA) may have a greater impact on public health than lower-intensity PA. The incorporation of a specific recommendation on VPA could complement and improve existing recommendations for average daily moderate-vigorous PA (MVPA). Physical education classes could have a positive impact on children's adherence to average daily physical activity recommendations. The aim was to investigate the association between MVPA and VPA in children, as well as adherence to recommendations, and obesity and the presence of physical education classes. A cross-sectional study of physical activity was conducted in a sample of 8 and 9-year-old children in Andalusia (Spain). GENEActiv accelerometers were used, placed on the non-dominant wrist for at least eight consecutive days (24-h protocol). School days with and without physical education class, and weekend days were defined. ROC curves were used to calculate the threshold associated with obesity for average daily MVPA and VPA for recommendations. A total of 360 schoolchildren were included in the analyses (184 girls). An average of 7.7 (SD 1.4) valid days per participant were evaluated, with 19.9 (SD 10.5) and 11.4 (SD 5.1) minutes of VPA performed by boys and girls respectively. 25.8% of the participants were classified with central obesity. The optimal threshold determined with ROC analysis was 12.5 and 9.5 minutes of average daily VPA for boys and girls, respectively (RecVPA), and 75 minutes of average daily MVPA for both sexes (RecMVPA). The RecVPA showed stronger association with obesity. On school days with physical education class, compared to days without this class, children showed increased VPA and MVPA engagement and better compliance with recommendations, with smaller differences in adherence according to sex or obesity. On days with physical education class, more physical activity was accumulated at all intensities and greater adherence to the recommendations than on days without this class. VPA had a stronger correlation with the absence of obesity than lower-intensity activity. It was also observed that boys were physically more active and had higher adherence to the recommendations than girls.

Association of physical activity intensity with cardiovascular disease and mortality in high-income, middle-income and low-income countries: the PURE study

Abstract Background The WHO recommends adults get 150-300 minutes of moderate physical activity (MPA) and/or 75-150 minutes of vigorous physical activity (VPA) per week. Few studies have investigated the independent benefits of PA intensity. Those that have, have found VPA to be protective, while others found excessive VPA to be harmful. These studies have primarily been conducted in high-income countries using recreational PA as the exposure of interest. Purpose To evaluate the effects of activity intensity (walking, MPA and VPA) with all-cause mortality, and cardiovascular disease (CVD) in countries at different economic levels. Methods Participants (35-70 years) were recruited from 21 countries at various stages of economic development. Within each country, urban and rural areas in and around selected cities and towns were identified to reflect the geographical diversity. Physical activity (total, walking, MPA, VPA, as well as recreational vs. non-recreational PA) was assessed using the International Physical Activity Questionnaire. Primary outcomes were mortality plus major CVD (CVD mortality, myocardial infarction, stroke, or heart failure), either as a composite or separately. After excluding those with baseline CVD, cancer and HIV, a total of 136,766 participants who had complete data were analyzed. Models were adjusted for age, sex, urban or rural residency, country income level, education, household wealth index, smoking, baseline chronic diseases, physical impairments and center as a random effect. All models were mutually adjusted for PA intensity. Results During the median follow-up of 11.5 (8.6-12.4) years, there were 9846 deaths and 7900 major cardiovascular events. The mean min/wk for walking, MPA and VPA were 339±539, 640±825 and 103±390, respectively. Increasing walking time had a U-shaped relationship with the composite outcome, such that walking between 300-1200 min/wk had the lowest risk, whereas walking at this amount and ≥1200 min/wk was associated with the lowest risk for mortality (p<0.001 for trend). Both MPA and VPA were linearly associated with the composite outcome and mortality even at levels below the recommended guidelines and up to ≥1800 min/wk (p<0.001 for trend). At each PA category, the hazard ratio for VPA was lower than MPA, such that at ≥1800 min/wk it was 0.64 (0.50,0.81) and 0.70 (0.57,0.85), for VPA and MPA, respectively, for the composite outcome. When VPA was stratified into either recreational or non-recreational VPA, recreational VPA displayed a U-shape relationship, whereas increasing non-recreational VPA continued to confer reduced risk even ≥3000 min/wk (Figure). Conclusion For both MPA and VPA, the benefits began at very low levels of PA and continued to increase with increasing PA. At each amount of PA, the lowest risk was in those participating in VPA. We did not observe any harmful effects of VPA, even at extremely high levels. However, at higher recreational VPA, the benefits began to diminish.

Abstract 15439: Association of Vigorous Physical Activity With Cardiovascular Disease and Mortality in 136,766 Adults From High-Income, Middle-Income and Low-Income Countries: The Prospective Urban Rural Epidemiological (PURE) Study

Background: It’s recommended adults get 150-300 minutes of moderate physical activity (MPA) and/or 75-150 minutes of vigorous physical activity (VPA) per week. Some studies have found high VPA to be protective and others found it to be harmful. These studies have been conducted in high-income countries using recreational VPA as the exposure of interest. Purpose: To evaluate the effects of VPA with all-cause mortality, and cardiovascular disease (CVD) in countries at different economic levels. Methods: Participants aged 35-70 years were recruited from 21 countries at various stages of economic development. Physical activity (total, walking, MPA, VPA, as well as recreational vs. non-recreational PA) was assessed using the International Physical Activity Questionnaire. Primary clinical outcomes were the composite of mortality plus major CVD (CVD mortality, myocardial infarction, stroke, or heart failure) and mortality. A total of 136,766 participants without baseline CVD, cancer, and HIV were analyzed. Models were adjusted for age, sex, urban/rural residency, country income level, education, household wealth index, smoking, baseline chronic diseases, physical impairments, MPA, walking and centre as a random effect. Results: During the median follow-up of 11.5 (8.6-12.4) years, there were 9846 deaths and 7900 major CVD events. The median min/wk (IQR) for total PA, walking, MPA and VPA were 690 (250-1530), 40 (0-420), 330 (75-860), 0 (0-0). The mean VPA was 103±390 min/wk. Compared to no VPA, 150-299 minutes per week of VPA was associated with reduced risk for the composite outcome and mortality, HR = 0.82 (0.73,0.92) and 0.74 (0.64,0.86), respectively. When VPA was stratified into either recreational or non-recreational VPA, recreational VPA displayed a U-shape relationship, such that higher levels were associated with less benefit. Increasing non-recreational VPA continued to confer reduced risk even above 3000 min/wk. At any amount of moderate PA, higher VPA was associated with reduced risk for the composite outcome and mortality. Conclusion: Higher levels of VPA were associated with reduced risk for mortality and major CVD events up to more than 40 times the minimum recommended amount. At no point did VPA confer an increased risk.

Health-Promoting Lifestyle Behaviors of Korean American Breast Cancer Survivors: Adherence to the American Cancer Society Guidelines.

Breast cancer incidence has been increasing in Korean American women. However, there are limited data on Korean American breast cancer survivors' health-promoting lifestyle behaviors. The American Cancer Society (ACS) publishes guidelines on weight, diet, physical activity, and alcohol for cancer survivors. Because of limited data on Korean American breast cancer survivors, their level of adherence to ACS guidelines is unknown. The aim of this study was to examine Korean American breast cancer survivors' level of adherence to ACS guidelines. Korean American breast cancer survivors (N = 50) participated in a cross-sectional study. Diet data including alcohol consumption were collected with 4-day diet records. Physical activity data were collected with the International Physical Activity Questionnaire. Total score of adherence to ACS guidelines was assessed with a systematic scoring system that ranged from 0 to 8. Participants' average body mass index was 23.7 (±2.7). Average daily serving of fruits and vegetables was 3.3 (±2.9), red meat was 0.8 (±1.5), and alcohol was 0. On average per week, participants had 51.8 (±85.2) minutes of moderate physical activity, 35 (±78.3) minutes of vigorous physical activity, and 69.1 (±73.7) minutes of walking. The average total adherence score to ACS guidelines was 5.3 (±1.3). Findings indicate modest adherence to ACS guidelines, with the alcohol guideline score contributing the most and diet guideline score the least. Findings from this study can be used to inform healthcare providers to educate Korean American breast cancer survivors on improving their diet and physical activity behaviors.

Australian secondary school principals’, parents’, and students’ attitudes to prescribed school footwear

Introduction: Adolescents participate in up to 120 minutes of vigorous physical activity per day, of which 23% is performed during school hours and in school footwear. The aim of this study was to ascertain the most important factors influencing school footwear selection among adolescents, their parents and secondary school principals.

Associations of emotional/behavioral problems with accelerometer-measured sedentary behavior, physical activity and step counts in children with autism spectrum disorder.

BackgroundThe evidence for associations of emotional/behavioral status with sedentary behavior (SB), physical activity (PA) and step counts is scarce in children with autism spectrum disorder (ASD). Also, ASD-related deficiencies may affect actual levels of PA. We aimed to describe accelerometer-measured SB, PA and step counts in children with ASD, and to examine the associations of emotional/behavioral problems with SB, PA and step counts after assessing associations between accelerometer-measured SB, PA and step counts and ASD-related deficiencies.MethodsA total of 93 ASD children, aged 6–9 years, were recruited from the Center for Child and Adolescent Psychology and Behavioral Development of Sun Yat-sen University in Guangzhou, China. Participants wore an accelerometer for seven consecutive days. Of the original 93, 78 participants' accelerometer-measured valid PA were obtained, and the data were shown as time spent in SB, light, moderate, moderate-to-vigorous and vigorous PA, and step counts. Participants' emotional/behavioral problems were assessed via the Strengths and Difficulties Questionnaire (SDQ), and anxiety symptoms were evaluated by the Screen for Child Anxiety Related Emotional Disorders (SCARED). ASD-associated deficiencies include restricted repetitive behaviors (Repetitive Behavior Scale-Revised), poor social competence (Social Responsiveness Scale Second Edition) and motor development restrictions (Developmental Coordination Disorder Questionnaire).ResultsOf the 78 participants, daily vigorous PA (VPA) and moderate-to-vigorous PA (MVPA) averaged 15.62 and 51.95 min, respectively. After adjustment for covariates, SDQ emotional symptoms (β = −0.060, p = 0.028) were inversely associated with the average daily minutes in VPA. Meanwhile, SDQ emotional symptoms (β = −0.033, p = 0.016) were inversely associated with the average daily MVPA minutes in the crude model. After adjustment for covariates, SCARED somatic/panic (β = −0.007, p = 0.040) and generalized anxiety (β = −0.025, p = 0.014) were negatively associated with the average daily VPA minutes; SCARED total anxiety (β = −0.006, p = 0.029) was conversely associated with daily MVPA duration. After adjustment for covariates, no significant associations between accelerometer-measured SB, PA and step counts and ASD-related deficiencies were found (p > 0.05).ConclusionsAccelerometer-measured SB, PA and step counts showed no associations with ASD-related deficiencies. On this basis, we further found that the emotional symptoms were inversely associated with VPA and MVPA. These results emphasize the importance of VPA and MVPA in children with ASD. The longitudinally investigations on the directionality of these associations between emotional symptoms with VPA and MVPA are needed in the future.

The association between food insecurity and physical activity in adults with serious mental illness living in supportive housing

Rates of food insecurity are high among adults with serious mental illness (SMI); this population also engages in less physical activity than the general population. However, the relationship between food insecurity and physical activity in this group has not been explored. We examined food insecurity prevalence and its association with physical activity in 314 adults with SMI living in supportive housing in New York City and Philadelphia and enrolled in an institutional review board-approved randomized controlled trial of a Peer Group Lifestyle Balance (PGLB) program. We analyzed 2014 baseline survey data, including demographic data and self-reported food security, and four self-reported physical activity outcomes: any physical activity per week (yes/no) and 2) total, 3) moderate, or 4) vigorous physical activity minutes per week. A logistic regression model examined food security as a predictor of any physical activity; zero-inflated negative binomial regression models were used for the other three physical activity outcomes; demographic and clinical predictors were assessed for inclusion in models. Over half of participants (51.7%) reported low or very low levels of food security. Relationships between food insecurity and three physical activity measures (any physical activity, total weekly minutes, and moderate weekly minutes) were non-significant; those with lower food security were more likely to engage in vigorous physical activity. The high food insecurity prevalence highlights the importance of measuring and addressing food security in populations experiencing SMI; measuring physical activity is also important for tailored lifestyle recommendations. Future studies should examine longitudinal changes in food security and physical activity.

34679 Association of adult atopic dermatitis severity with decreased physical activity: A cross-sectional study

In multivariable logistic regression models controlling for age, sex, race/ethnicity and asthma history, patient-reported global AD severity, Patient-Oriented Eczema Measure (POEM), Eczema Area and Severity Index (EASI), and Investigator’s Global Assessment (IGA) were associated with itch impairing light, moderate and vigorous physical activity, and higher Patient-Reported Outcome Measurement Information System Itch Questionnaire Physical Activity T-scores. Higher objective Scoring AD (O-SCORAD) was associated with itch impairing moderate physical activity. In bivariable analyses, odds of performing ≥30 minutes of light physical activity ≥1 day a week were lower with increased patient-reported AD severity, POEM, and EASI scores; ≥30 minutes of moderate physical activity ≥1 day a week were lower with increased patient-reported AD severity, EASI, O-SCORAD, and IGA; ≥30 minutes of vigorous physical activity were lower with increased patient-reported AD severity, EASI, O-SCORAD, and IGA scores. In multivariable logistic regression models, increased impact of itch on physical activity was associated with lower odds of performing light, moderate, and vigorous physical activity.

Moderate‐to‐Vigorous Physical Activity and Time‐Restricted Eating are Predictors of Fat Mass Loss in Overweight and Obese Females Following an Eight‐Week Exercise and Dietary Intervention

BackgroundThe American College of Sports Medicine recommends 300 minutes of moderate or 150 minutes of vigorous physical activity (MVPA) per week, in combination with proper nutrition, to obtain substantial health benefits and weight loss. Fasting dietary strategies, such as time‐restricted eating (TRE), combined with resistance exercise have been shown to reduce fat mass and maintain or increase lean mass. Concurrent exercise, the inclusion of aerobic and resistance exercise, and TRE may be a valid method for preserving lean mass during weight loss while simultaneously reducing disease risk and improving functional performance.ObjectiveThe purpose of this investigation was to determine whether average time spent in MVPA, an indicator of concurrent exercise training volume, was a predictor of fat mass loss in physically inactive overweight and obese females following an eight‐week dietary and concurrent exercise intervention, regardless of dietary group allocation. We hypothesized that MVPA will predict decreases in fat mass observed during the intervention.MethodsStepwise linear regression determined the relationship between MVPA and fat mass loss. A total of 18 females (mean ± SD; age 43.7 ± 7.3 years; BMI 29.7 ± 2.3 kgm2) were included in the analysis. Body and fat mass were assessed pre‐ and post‐exercise and dietary intervention using dual‐energy x‐ray absorptiometry. Dietary intakes were estimated using three‐day dietary logs and ESHA software at weeks one, four, and seven. Dietary group allocation was recorded as “1” for TRE and “0” for normal eating. Dietary group, age (years), height (cm), pre‐intervention body and fat mass (kg), average time spent in MVPA (min/week), average energy intake (kcal/day), and average carbohydrate, fat, and protein intake (g/day) were included in the analysis. Age was self‐reported and MVPA was assessed at weeks two, five, and eight using accelerometry.ResultsOur model explained 55.7% of the variance in fat mass changes (F2, 15= 9.424; p = 0.002). Stepwise analysis indicated that reductions in fat mass were predicted first by participation in TRE (β ± SE; ‐1.739 ± 0.451; p = 0.002) and then by time spent in MVPA (β ± SE; ‐0.004 ± 0.002; p = 0.044).ConclusionTime spent in MVPA and TRE were predictors of fat mass loss following eight weeks of dietary and concurrent exercise intervention. The significance of MVPA to the model indicates that concurrent exercise contributes to fat loss regardless of dietary pattern.

The Importance of Physical Activity for Mental Health

The Importance of Physical Activity for Mental Health Abstract. Due to the worldwide high prevalence of psychiatric disorders and its association with sedentary behavior and comorbid physical diseases, increasing physical activity in psychiatric populations is of high importance. Regular physical activity is associated with increased mental wellbeing and has shown to have preventive effects on depression, anxiety disorders and probably sleep disorders. Additionally, positive effects on comorbid chronic physical diseases have been found. Exercise as treatment for several weeks has shown to have an antidepressant effect. Similar positive effects on symptoms have been found in anxiety disorders and schizophrenia. Therefore, assessing and promoting physical activity is advisable in clinical psychiatric practice. Patients should be coached to reach at least a weekly average of 150 minutes of moderate and/or 75 minutes of vigorous physical activity. Establishing physical activity and exercise groups is of utmost importance for psychiatric outpatients.

The Importance of Physical Activityfor Mental Health.

Due to the worldwide high prevalence of psychiatric disorders and its association with sedentary behavior and comorbid physical diseases, increasing physical activity in psychiatric populations is of high importance. Regular physical activity is associated with increased mental wellbeing and has shown to have preventive effects on depression, anxiety disorders and probably sleep disorders. Additionally, positive effects on comorbid chronic physical diseases have been found. Exercise as treatment for several weeks has shown to have an antidepressant effect. Similar positive effects on symptoms have been found in anxiety disorders and schizophrenia. Therefore, assessing and promoting physical activity is advisable in clinical psychiatric practice. Patients should be coached to reach at least a weekly average of 150 minutes of moderate and/or 75 minutes of vigorous physical activity. Establishing physical activity and exercise groups is of utmost importance for psychiatric outpatients.

HIIT and Resistance Training Effects on Learning-related Outcomes in Underserved School Children

Research has demonstrated associations between differing modalities of physical activity (PA) and behavioral and learning outcomes; however, little evidence exists in real world settings. To evaluate the effects of embedding high intensity interval training (HITT) and resistance training (RT) into physical education (PE) curriculum on PA, academic performance, and behavior in youth attending urban schools. Forty boys and 30 girls; ages 8-10 yrs. enrolled in an expanded public school supplemental learning program were assigned into one of three conditions using a pragmatic trial design: standard PE curriculum (n = 23), HITT (n = 25), and RT (n = 22). PA was measured using accelerometers; math achievement scores were conducted at baseline and post-intervention using the Math Knowledge Assessment (MKA); behavior was assessed using the Abbreviated Conners Rating Scale (ACRS) daily. Participation in HITT resulted in 1.86 additional vigorous PA minutes (p=0.04) and 0.76 additional very vigorous PA minutes (P=0.02) per session, but was not associated with increased moderate PA minutes compared to the control group. RT PA outcomes did not differ from regular PE. Participating in HIIT, but not RT, was associated with a 1.82-point improvement in math test scores compared to those in the same grade in the standard PE group (p=0.02). No group assignment was associated with behavioral ratings. Embedding HITT within PE has potential for improving vigorous PA levels and may affect learning outcomes in urban youth. This is consistent with prior studies which show how short bouts of intense exercise can improve cognitive outcomes.

The Impact Of Covid-19 On Physical Activity Among Chinese College Students

PURPOSE: This study was to estimate the impact of COVID-19 on physical activity (PA) for Chinese university student during the pandemic lockdown period. METHODS: We conducted a on-line questionnaire on 1487 (947males & 513 females; Age 19.7 ± 1.3 yr., Height = 172.2 ± 8.2 cm, Weight = 65.9 ± 15.6 kg, BMI = 21.1 ± 4.5) college students from one university in China during the pandemic period and students retrospectively recalled pre-pandemic PA levels (Mar 29- April 15, 2020). PA was measured using the short version of the International Physical Activity Questionnaire (IPAQ), which has been validated in China to measure physical activity. PA of social isolation in the last week during the COVID-19 pandemic period and before the COVID-19 pandemic were measured based on IPAQ. The data were analyzed using paired-samples t-test. RESULTS: Before the COVID-19, survey participants on averaged engaged in 136.2 (SD =115.6) minutes of vigorous physical activity, 179.5 (SD = 138.1) minutes of moderate physical activity, 284.1 (SD = 205.4) minutes MVPA, walked for 179.1 (SD = 144.6) minutes, respectively. During the COVID-19, survey participants on average engaged in 105.6 (SD =92.7) minutes of vigorous physical activity, 95.1 (SD = 89.2) minutes of moderate physical activity, 143.5 (SD = 126.8) minutes MVPA, walked for 140.1 (SD = 142.5) minutes, respectively. Overall, the COVID-19 discouraged a reduction in weekly total minutes of vigorous physical activity by 40.6 (29.8%↓, SD =112.2), a reduction in weekly total minutes of moderate physical activity by 73.9 (41.1%↓, SD =113.4), a reduction in weekly total minutes of MVPA by 141.3 (49.7%↓, SD =196.6), a reduction in weekly total minutes of walking by 44.6 (24.9↓, SD =176.6), respectively. CONCLUSIONS: The COVID-19 lockdown was associated with a reduction of physical activity among Chinese college students.

Physical Activity Among Parents of Children With Disabilities: A Systematic Review

The purpose of the present systematic review was to synthesize the existing research on physical activity behaviors in parents of children with disabilities. For the systematic search, search terms were entered into three electronic databases. After systematic evaluations, 12 studies were included in the present systematic review. Using the physical activity guidelines (i.e., 150 minutes of moderate physical activity per week or 75 minutes of vigorous physical activity per week), the 12 studies were divided into three categories: active, not active, and unknown. The active category included two studies (16.7%) indicating that parents of children with disabilities meet the physical activity guidelines. The not active category included seven studies (50%) indicating that parents of children with disabilities do not meet the physical activity guidelines. More research is needed to determine physical activity behaviors in parents of children with disabilities.

Characteristics Associated With People With Chronic Low Back Pain Meeting Physical Activity Guidelines and Recommendations for Sedentary Behavior: A Cross-Sectional Study

ObjectiveThe purpose of this study was to identify factors associated with meeting physical activity guidelines and sedentary recommendations in people with chronic low back pain (LBP). MethodsThis was a cross-sectional study including 171 people with chronic LBP. Trained assessors collected information regarding demographic, anthropometric, and clinical data. Physical activity levels and sedentary time were objectively measured using a tri-axial accelerometer. Participants were classified as being physically active (ie, performing at least 150 minutes of moderate or 75 minutes of vigorous physical activity per week) and sedentary (ie, more than 8 hours of time spent in sedentary activities per day). Multivariable logistic regression analyses were used to determine the association of being physically active or sedentary with the range of demographic, anthropometric and clinical variables. ResultsOur results showed that although lower body mass index (odds ratio [OR] = 0.91; 95% CI: 0.85-0.98) and higher self-reported levels of leisure time physical activity (OR = 3.46; 95% CI: 1.94-6.15) were associated with being physically active, lower self-reported levels of physical activity at work (OR = 0.56; 95% CI: 0.39-0.81) was associated with being sedentary. ConclusionOur findings showed that, in people with LBP, lower body mass index and higher levels of leisure time physical activity may be important factors for identifying those physically active. In contrast, lower levels of physical activity at work may be considered when identifying sedentary people with LBP. Future studies should consider these factors when designing interventions aiming to promote physical activity and decrease sedentary behavior in this population.

The relationship between sleep and physical activity: the moderating role of daily alcohol consumption.

Studies have demonstrated a daily, bidirectional relationship between sleep and physical activity. However, little is known about how other health behaviors, such as alcohol consumption affect this relationship. This study examined how daily and average alcohol consumption affects the relationships between sleep and physical activity. Participants included 70 men and women, ages 18-50 with sleep duration >6.5 hours. Participants wore an actigraph, physical activity monitor and recorded number of alcoholic drinks by daily food logs for 7 days. Results were analyzed using multi-level models to evaluate the 7-day average (i.e. between-person effects) and daily effects (i.e. within-person effects) simultaneously. Those with more average (7 day) minutes of vigorous physical activity had less wake after sleep onset (WASO). Furthermore, a higher number of alcoholic drinks was associated with longer sleep duration and higher WASO over 7 days. Days with a higher number of alcoholic drinks were associated with higher WASO and sleep fragmentation that night. Alcohol intake moderated the average (7 days) and daily relationships between sleep and physical activity such that high average (7 days) WASO was associated with shorter average total physical activity duration, but only for those with higher alcohol intake. In addition, longer physical activity duration during the day was associated with lower sleep fragmentation that night, but only for those with lower alcohol intake. These data demonstrate that in a naturalistic setting, alcohol intake negatively impacts sleep and diminishes the benefits of physical activity on sleep.

Objective Measurement of Physical Activity Attributed to a Park-Based Afterschool Program

Only 24% of US youth meet physical activity recommendations set by the Centers for Disease Control and Prevention. Research demonstrates that community-based programs provide underresourced minority youth with opportunities for routine physical activity, although limited work draws from accelerometry data. This study objectively assessed youth physical activity attributable to participation (vs nonparticipation) days in a park-based afterschool program in Miami-Dade County, Miami, FL. Participants' (n = 66; 60% male; 57% white Hispanic, 25% non-Hispanic black, 14% Black Hispanic, mean age = 10.2y) physical activity was assessed April to May 2019 over 10 days across 7 park sites using Fitbit (Charge 2) devices. Separate repeated-measures multilevel models were developed to assess the relationship between program daily attendance and total (1)moderate to vigorous physical activity minutes and (2)step counts per day. Models adjusted for individual-level age, sex, race/ethnicity, poverty, and clustering by park showed significantly higher moderate to vigorous physical activity minutes (β = 25.33 more minutes per day; 95% confidence interval, 7.0 to 43.7, P < .01) and step counts (β = 4067.8 more steps per day; 95% confidence interval, 3171.8 to 4963.8, P < .001) on days when youth did versus did not attend the program. Study findings suggest that park-based programs may support underserved youth in achieving daily physical activity recommendations.

Accelerometer-Assessed Habitual Physical Activity and Sedentary Time of Chinese Children and Adolescents with Visual Impairments

Introduction: Physical activity is a key component of a healthy lifestyle for youths with visual impairments (i.e., blindness or low vision). This study aims to examine the habitual physical activity and sedentary time of Chinese children and adolescents with visual impairments and to determine whether age, gender, and body composition significantly influence their behavior. Methods: A purposeful sample method was utilized to recruit 137 Chinese youths with visual impairments from a special school for individuals with visual and hearing impairments. A total of 72 students with visual impairments (aged 7–17 years; M age = 13.4) participated in this study. ActiGraph GT3X accelerometers were used to measure the habitual physical activity and sedentary time. Results: Youths with visual impairments in this study spent an average of 287.86 (standard deviation [ SD] = 45.67) minutes of light physical activity, 146.79 ( SD = 56.95) minutes of moderate physical activity, 18.47 ( SD = 15.15) minutes of vigorous physical activity, 165.26 ( SD = 69.83) minutes of moderate-to-vigorous-intensity physical activity, and 979.51 ( SD = 109.10) minutes of sedentary time per day. Children with visual impairments in elementary school engaged in more habitual physical activity and had less sedentary time than did students in middle and high school. Differences in gender and body composition with regard to time spent being active or sedentary were insignificant. Discussion: Findings demonstrated that Chinese youths with visual impairments in this study had sufficient health-enhancing physical activity and were habitually active. Future research is needed to identify the factors that account for the high habitual physical activity levels of Chinese youths with visual impairments. Implications for practitioners: Transition planning for students with visual impairments to facilitate active habitual physical activity participation when children grow up is warranted.

Late Adulthood Physical Activity Trajectories In Relation To All-cause Mortality

PURPOSE: Despite the known benefits of being physically active, about half of U.S. adults (and nearly two-thirds of adults age 65+ years) do not meet current U.S. Physical Activity Guidelines for Americans of 150-300 minutes of moderate (75-150 minutes of vigorous) physical activity (MVPA) per week. Given the aging U.S. population and rising healthcare costs, identifying factors associated with healthy aging is critical. There is limited epidemiologic evidence examining whether increasing or initiating MVPA in later adulthood can increase longevity. This study examined the association between late adulthood MVPA trajectories and all-cause mortality in a large U.S. prospective cohort. METHODS: This analysis included 71,862 Cancer Prevention Study-II Nutrition Cohort participants (mean age 74.1 years; range 52-89 years) who were free of major chronic diseases. Participants self-reported MVPA at two time points approximately 5-years apart and were categorized based on their level of adherence to MVPA guidelines at each time point (inactive, “insufficiently active”, “sufficient”, and “>double minimum recommended”). 12 trajectories were defined (4 each for consistent, increasing, or decreasing MVPA); participants who were consistently “insufficiently active” served as the reference category. Multivariable Cox proportional hazards regression modeling was used to estimate hazard ratios (HR) and 95% confidence intervals (CI). RESULTS: After an average of 9.9 years of follow-up, 22,736 deaths occurred. The most active participants (>double recommended) at both time points had a 24% lower mortality risk compared to insufficiently active participants (95% CI 0.73-0.79). Those who increased MVPA over time (insufficient to sufficient) also had a lower mortality risk (HR=0.85, 95% CI 0.80-0.91). Conversely, those who decreased activity (sufficient to inactive) had a higher mortality risk (HR=1.18, 95% CI 1.10-1.26). Associations were similar for men and women, and for cardiovascular disease and cancer-specific mortality. CONCLUSIONS: Maintaining a physically active lifestyle at older ages is optimal for longevity. Public health messaging should encourage active individuals to maintain their physical activity level as they age and reinforce that it is never too late to start being active.