The Effect of the Presence of an Internet-Connected Mobile Tablet Computer on Physical Activity Behavior in Children

2018 ◽  
Vol 30 (1) ◽  
pp. 150-156 ◽  
Author(s):  
Mallory S. Kobak ◽  
Andrew Lepp ◽  
Michael J. Rebold ◽  
Hannah Faulkner ◽  
Shannon Martin ◽  
...  
Keyword(s):  
Physical Activity ◽  
Sedentary Behavior ◽  
Physical Activity Behavior ◽  
Mobile Internet ◽  
Tablet Computer ◽  
Physical Activity Intensity ◽  
Activity Intensity ◽  
Metabolic Equivalents ◽  
Activity Behavior ◽  
Sedentary Activities

Background: Mobile Internet-connected electronic devices provide access to activities that have traditionally been associated with sedentary behavior. Because they are portable, these devices can be utilized in any environment. Therefore, providing children with access to these devices in environments that typically promote physical activity may result in a reduction in physical activity behavior. Purpose: To assess children’s physical and sedentary (ie, sitting) activity with and without the presence of a mobile Internet-connected tablet computer. Methods: A total of 20 children [6.7 (1.9) y old] participated in 2 simulated recess conditions in a gymnasium on separate days. During each condition, children had free-choice access physical activity options and a table of sedentary activities for 40 minutes. During 1 session, the iPad was present, and in the other session, it was not. Physical activity was monitored via an accelerometer, and sedentary time was monitored via a stopwatch. Results: Children significantly (P ≤ .03) reduced average physical activity intensity and increased their sedentary behavior with the iPad present [4.4 (4.0) metabolic equivalents/min and 20.9 (12.4) min sitting] versus the condition without the iPad present [5.3 (4.0) metabolic equivalents/min and 13.6 (13.2) min sitting]. Conclusion: Introducing an mobile Internet-connected tablet computer into a gymnasium reduced children’s physical activity intensity by 17% and increased sedentary behavior by 54%.

Perceived Exertion of Physical Activity During Pregnancy

2015 ◽  
Vol 12 (7) ◽  
pp. 1039-1043 ◽  
Author(s):  
Mallory R. Marshall ◽  
James M. Pivarnik
Keyword(s):  
Physical Activity ◽  
Perceived Exertion ◽  
Treadmill Exercise ◽  
Physical Activity Behavior ◽  
Rating Of Perceived Exertion ◽  
Moderate Intensity ◽  
Physical Activity Intensity ◽  
Time Points ◽  
Activity Intensity ◽  
Vigorous Intensity

Background:Maternal physical activity declines across gestation, possibly due to changing perception of physical activity intensity. Our purpose was to a) determine whether rating of perceived exertion (RPE) during a treadmill exercise changes at a given energy expenditure, and b) identify the influence of prepregnancy physical activity behavior on this relationship.Methods:Fifty-one subjects were classified as either exercisers (N = 26) or sedentary (N = 25). Participants visited our laboratory at 20 and 32 weeks gestation and at 12 weeks postpartum. At each visit, women performed 5 minutes of moderate and vigorous treadmill exercise; speed was self-selected. Heart rate (HR), oxygen consumption (VO2), and RPE were measured during the last minute at each treadmill intensity.Results:At moderate intensity, postpartum VO2 was higher compared with 20- or 32-week VO2, but there was no difference for HR or RPE. For vigorous intensity, postpartum HR and VO2 were higher than at 32 weeks, but RPE was not different at any time points.Conclusions:RPE does not differ by pregnancy time point at either moderate or vigorous intensity. However, relative to energy cost, physical activity was perceived to be more difficult at 32 weeks compared with other time points. Pregnant women, then, may compensate for physiological changes during gestation by decreasing walking/running speeds.

scholarly journals Ability of RT3 Accelerometer Cut Points to Detect Physical Activity Intensity in Ambulatory Children With Cerebral Palsy

2014 ◽  
Vol 31 (4) ◽  
pp. 310-324 ◽  
Author(s):  
Jennifer Ryan ◽  
Michael Walsh ◽  
John Gormley
Keyword(s):  
Physical Activity ◽  
Cerebral Palsy ◽  
Vigorous Physical Activity ◽  
Accelerometer Data ◽  
Physical Activity Intensity ◽  
Cut Points ◽  
Cut Point ◽  
Activity Intensity ◽  
Metabolic Equivalents ◽  
Children With Cerebral Palsy

This study investigated the ability of published cut points for the RT3 accelerometer to differentiate between levels of physical activity intensity in children with cerebral palsy (CP). Oxygen consumption (metabolic equivalents; METs) and RT3 data (counts/min) were measured during rest and 5 walking trials. METs and corresponding counts/min were classified as sedentary, light physical activity (LPA), and moderate to vigorous physical activity (MVPA) according to MET thresholds. Counts were also classified according to published cut points. A published cut point exhibited an excellent ability to classify sedentary activity (sensitivity = 89.5%, specificity = 100.0%). Classification accuracy decreased when published cut points were used to classify LPA (sensitivity = 88.9%, specificity = 79.6%) and MVPA (sensitivity = 70%, specificity = 95–97%). Derivation of a new cut point improved classification of both LPA and MVPA. Applying published cut points to RT3 accelerometer data collected in children with CP may result in misclassification of LPA and MVPA.

scholarly journals Linking the American Time Use Survey (ATUS) and the Compendium of Physical Activities: Methods and Rationale

2009 ◽  
Vol 6 (3) ◽  
pp. 347-353 ◽  
Author(s):  
Catrine Tudor-Locke ◽  
Tracy L. Washington ◽  
Barbara E. Ainsworth ◽  
Richard P. Troiano
Keyword(s):  
Physical Activity ◽  
Time Use ◽  
Physical Activities ◽  
Surveillance Systems ◽  
Physical Activity Intensity ◽  
American Time Use Survey ◽  
Activity Intensity ◽  
Metabolic Equivalents ◽  
Time Use Survey ◽  
Health Related

Background:The 2003 Bureau of Labor Statistics American Time Use Survey (ATUS) contains 438 distinct primary activity variables that can be analyzed with regard to how time is spent by Americans. The Compendium of Physical Activities is used to code physical activities derived from various surveys, logs, diaries, etc to facilitate comparison of coded intensity levels across studies.Methods:This article describes the methods, challenges, and rationale for linking Compendium estimates of physical activity intensity (METs, metabolic equivalents) with all activities reported in the 2003 ATUS.Results:The assigned ATUS intensity levels are not intended to compute the energy costs of physical activity in individuals. Instead, they are intended to be used to identify time spent in activities broadly classified by type and intensity. This function will complement public health surveillance systems and aid in policy and health-promotion activities. For example, at least one of the future projects of this process is the descriptive epidemiology of time spent in common physical activity intensity categories.Conclusions:The process of metabolic coding of the ATUS by linking it with the Compendium of Physical Activities can make important contributions to our understanding of American’s time spent in health-related physical activity.

Physical activity intensity and subjective well-being in healthy adults

2017 ◽  
Vol 24 (9) ◽  
pp. 1257-1267 ◽  
Author(s):  
Gregory A Panza ◽  
Beth A Taylor ◽  
Paul D Thompson ◽  
C Michael White ◽  
Linda S Pescatello
Keyword(s):  
Physical Activity ◽  
Sedentary Behavior ◽  
Well Being ◽  
Healthy Adults ◽  
Moderate Intensity ◽  
Subjective Well Being ◽  
Physical Activity Intensity ◽  
Psychological Well Being ◽  
Negatively Associated ◽  
Activity Intensity

The effect of physical activity intensity on subjective well-being has not been well established. We examined this relationship among 419 healthy adults using objective and subjective physical activity measurements (sample size varied among well-being assessments). For accelerometers, light-intensity physical activity positively associated with psychological well-being ( n = 150) and negatively associated with depression ( n = 99); moderate intensity negatively associated with pain severity ( n = 419) and positively associated with psychological well-being; sedentary behavior negatively associated with psychological well-being and positively associated with depression ( ps < .05). These findings were generally consistent with subjective measurements of physical activity (Question 8, Paffenbarger Questionnaire). Higher levels of sedentary behavior are associated with lower subjective well-being.

scholarly journals Estimating Absolute and Relative Physical Activity Intensity Across Age via Accelerometry in Adults

2010 ◽  
Vol 18 (2) ◽  
pp. 158-170 ◽  
Author(s):  
Nora E. Miller ◽  
Scott J. Strath ◽  
Ann M. Swartz ◽  
Susan E. Cashin
Keyword(s):  
Physical Activity ◽  
Oxygen Consumption ◽  
Predictive Validity ◽  
Age Groups ◽  
Regression Equations ◽  
Physiological Changes ◽  
Physical Activity Intensity ◽  
Activity Intensity ◽  
Metabolic Equivalents ◽  
Calibration Study

This study examined the predictive validity of accelerometers (ACC) to estimate physical activity intensity (PAI) across age and differences in intensity predictions when expressed in relative and absolute PAI terms. Ninety adults categorized into 3 age groups (20–29, 40–49, and 60–69 yr) completed a treadmill calibration study with simultaneous ACC (7164 Actigraph) and oxygen-consumption assessment. Results revealed strong linear relations between ACC output and measured PAI (R2= .62–.89) across age and similar ACC cut-point ranges across age delineating absolute PAI ranges compared with previous findings. Comparing measured metabolic equivalents (METs) with estimated METs derived from previously published regression equations revealed that age did not affect predictive validity of ACC estimates of absolute PAI. Comparing ACC output expressed in relative vs. absolute terms across age revealed substantial differences in PAI ACC count ranges. Further work is warranted to increase the applicability of ACC use relative to PAI differences associated with physiological changes with age.

scholarly journals Comparison of a Wearable Tracker with Actigraph for Classifying Physical Activity Intensity and Heart Rate in Children

2019 ◽  
Vol 16 (15) ◽  
pp. 2663
Author(s):  
Kang ◽  
Kim ◽  
Byun ◽  
Suk ◽  
Lee
Keyword(s):  
Physical Activity ◽  
Sedentary Behavior ◽  
Validity And Reliability ◽  
Physical Activity Intensity ◽  
Intra Class Correlation ◽  
Activity Intensity ◽  
Research Grade ◽  
Vigorous Intensity ◽  
High Degree

Introduction: To examine the validity and reliability of the Fitbit Charge HR (FCH), wrist-worn ActiGraph (AG) accelerometers were used for assessing the classification of physical activity (PA) into intensity categories in children. Methods: Forty-three children (n = 43) participated in the study. Each participant completed 3 min bouts of 12 PAs ranging from sedentary to vigorous intensity while simultaneously wearing FCH and AG on both hands, a Polar HR monitor, and a portable indirect calorimeter. Total time spent in different PA intensity levels measured by FCH and AG were compared to the indirect calorimetry. Results: The highest classification accuracy values of sedentary behavior was 81.1% for FCH. The highest classification (72.4%) of light intensity PA was observed with Crouter’s algorithm from the non-dominant wrist. Crouter’s algorithm also show the highest classification (81.8%) for assessing moderate to vigorous intensity PA compared to FCH (70.8%). Across the devices, a high degree of reliability was found in step measurements, ranging from an intra-class correlation (ICC) = 0.92 to an ICC = 0.94. The reliability of the AG and the FCH showed high agreement for each variable. Conclusion: The FCH shows better validity for estimating sedentary behavior and similar validity for assessing moderate to vigorous PA compared to the research-grade monitor. Across the devices, the reliability showed the strongest association.

scholarly journals A proper reference metabolic equivalent value to assess physical activity intensity in Japanese female nurses

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Yuki Ideno ◽  
Kunihiko Hayashi ◽  
Jung Su Lee ◽  
Yukiko Miyazaki ◽  
Shosuke Suzuki
Keyword(s):  
Physical Activity ◽  
Energy Expenditure ◽  
Vigorous Physical Activity ◽  
Working Women ◽  
Physical Activity Intensity ◽  
Self Administration ◽  
Activity Intensity ◽  
Metabolic Equivalents ◽  
Epidemiological Surveys ◽  
Mcmc Simulation

Abstract Background Various questionnaires have been developed to assess physical activity, but only a few simple questionnaires are suitable for self-administration in large groups of midlife working women. This study examined the usefulness of the Japan Nurses’ Health Study (JNHS) questionnaire for self-administered physical activity surveys. Methods The JNHS physical activity questionnaire consisted of items covering seven degrees of intensity. The metabolic equivalents (METs) for the physical activity intensity of the questionnaire were estimated from energy expenditure as measured by a uniaxial accelerometer with the Markov Chain Monte Carlo (MCMC) simulation. The estimated METs were then assigned to the JNHS baseline survey data, and the total energy expenditure (TEE) and the time spent performing ≥3 METs hour of physical activity, called moderate to vigorous intensity physical activity (MVPA), were calculated. Results For working situations, application of the MCMC simulation resulted in estimated reference values of 1.2 METs for “sitting work”, 1.6 METs for “standing work”, 1.8 METs for “walking work”, and 4.5 METs for “heavy work”. For non-working situations, the estimated values were 1.1 METs for sedentary time, 2.4 METs for “moderate physical activity”, 4.4 METs for “vigorous physical activity”, and 9.4 METs for “very vigorous physical activity”. When these estimated METs were used, the mean TEE/day was 1808 kcal. This corresponded to − 3.0% of the TEE/day generated by the accelerometer. These estimated MET values showed similar results as a previous study measuring activity using the doubly-labeled water method. The number of hours per week of MVPA significantly decreased with age, which is also consistent with previous findings. Conclusions Estimated reference MET values in this study were similar to those in previous studies of Japanese women. The JNHS questionnaire is therefore useful for epidemiological surveys of midlife working women because it assigns estimated MET values as physical activity intensities.

Abstract P266: Physical Activity Intensity Is Associated With Visceral Fat Accumulation In A Multi-ethnic Cohort

Circulation ◽  
2012 ◽  
Vol 125 (suppl_10) ◽  
Author(s):  
Iris A Lesser ◽  
Ann C Yew ◽  
Scott A Lear
Keyword(s):  
Physical Activity ◽  
Ethnic Groups ◽  
South Asian ◽  
Visceral Fat ◽  
South Asians ◽  
Health Assessment ◽  
Physical Activity Intensity ◽  
Visceral Fat Accumulation ◽  
Activity Intensity ◽  
Metabolic Equivalents

Introduction: Excess accumulation of visceral adipose tissue (VAT) has been found to increase the risk of cardiometabolic disease. We have previously reported that Chinese and South Asians have higher amounts of VAT for a given body size compared to Europeans. Exercise has been shown to preferentially reduce VAT in a dose-response relationship with the intensity of physical activity (PA). The purpose of this study is to examine how the intensity of PA is associated with the amount of VAT in men and women of Chinese, European and South Asian origin. Methods/Results: The study population were 603 apparently healthy males and females between 30 and 65 years of age of Chinese (n = 207), European (n = 200), and South Asian (n = 196) origin who were part of the Multi-cultural Health Assessment Trial. PA was assessed using the Modifiable PA Questionnaire. Metabolic equivalents (METs) of reported activities were determined from the Ainsworth Compendium and were categorized into moderate (3–6 METs) and vigorous (>6 METs) intensities and reported as METs per week. Analysis of variance was used to determine differences in VAT and PA measures between ethnic groups. Linear regression analyses were used to explore the relationship between visceral fat and PA intensity. Moderate (p<0.001), vigorous (p<0.01) and total PA (p<0.01) differed significantly between all groups. Chinese and South Asians had greater amounts of VAT than Europeans adjusted for age, sex, BMI and income. Both moderate and vigorous PA were negatively associated with VAT after adjustment for confounders. When both moderate and vigorous PA were added to the model, the difference in VAT between Chinese and Europeans was no longer apparent (p=0.114). However, South Asians still had a significantly greater amount of VAT (p<0.001). Conclusion: Both PA and VAT differed among the ethnic groups. After consideration for differences in PA, there was no longer any difference in VAT between Chinese and Europeans suggesting that the higher amount of VAT observed in the Chinese population is a consequence of low PA levels. Consideration of PA did not affect differences in VAT in the South Asians and may indicate that other factors (whether dietary or genetic) play a role in the higher VAT amounts in South Asians.

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