scholarly journals Convergent validity of six methods to assess physical activity in daily life

2006 ◽  
Vol 101 (5) ◽  
pp. 1328-1334 ◽  
Author(s):  
Duncan J. Macfarlane ◽  
Cherry C. Y. Lee ◽  
Edmond Y. K. Ho ◽  
K. L. Chan ◽  
Dionise Chan
Keyword(s):  
Physical Activity ◽  
Heart Rate ◽  
Convergent Validity ◽  
Total Activity ◽  
Habitual Physical Activity ◽  
Moderate Activity ◽  
Free Living ◽  
Heart Rate Monitor ◽  
Cut Points ◽  
Activity Promotion

The purpose was to examine the agreement (convergent validity) between six common measures of habitual physical activity to estimate durations of light, moderate, vigorous, and total activity in a range of free-living individuals. Over 7 consecutive days, 49 ethnic Chinese (30 men, 19 women), aged 15–55 yr, wore a Polar heart rate monitor, a uniaxial MTI, and triaxial Tritrac accelerometer, plus a Yamax pedometer for ≥600 min/day. They also completed a daily physical activity log and on day 8 a Chinese version of the 7-day International Physical Activity Questionnaire. At each level of activity, there was good agreement between the two questionnaire-derived instruments and the two accelerometry-derived instruments, but wide variation across different instruments, with two- to fourfold differences in mean durations often seen. The heart rate monitor overestimated light activity and underestimated moderate activity compared with all other measures. Spearman correlation coefficients were low to moderate (0.2–0.5) across most measures of activity, with the pedometer showing correlations with total activity that were often superior to the other movement sensors. We conclude that, with the use of commonly accepted cut points for defining light, moderate, vigorous, and total activity, little convergent validity across the instruments was evident, suggesting these measures are sampling different levels of habitual physical activity and care is needed when comparing their results. To provide a more stable comparison of activity among different people, across studies, or against accepted physical activity promotion guidelines, further work is needed to fine tune the different cut points across a range of common activity monitors to provide more consistent results during free-living conditions.

Research Tracker 6 Accelerometer Calibration and Validation in Comparison to GENEActiv, ActiGraph, and Gas Analysis in Young Adults

2019 ◽  
Vol 2 (3) ◽  
pp. 176-187
Author(s):  
Emma L. J. Eyre ◽  
Jason Tallis ◽  
Susie Wilson ◽  
Lee Wilde ◽  
Liam Akhurst ◽  
...  
Keyword(s):  
Physical Activity ◽  
Young Adults ◽  
Convergent Validity ◽  
Complex Analysis ◽  
Axial Vector ◽  
Gas Analysis ◽  
Moderate Activity ◽  
Sedentary Behaviors ◽  
Cut Points ◽  
Activity Intensity

Background: The ability to objectively assess physical activity and inactivity in free living individuals is important in understanding activity patterns and the dose response relationship with health. Currently, a large number of research tools exist, but little evidence has examined the validity/utility of the Research Tracker 6 (RT6) monitor. Questions remain in regard to the best placements, positions, and cut-points in young adults to determine activity intensity across a range of activities. This study sought to address this gap in young adults. The study aims were 1) to examine criterion validity of RT6 in comparison to breath-by-breath gas analysis; 2) convergent validity of RT6 in comparison to ActiGraph and GENEActiv; 3) development of RT6 tri-axial vector magnitude cut-points to classify physical activity at different intensities (i.e., for sedentary, moderate, and vigorous); 4) to compare the generated cut-points of the RT6 in comparison to other tools. Methods: Following ethics approval and informed consent, 31 young adults (age = 22±3 years: BMI = 23±3 kg/m2) undertook five modes of physical activity/sedentary behaviors while wearing three different accelerometers at hip and wrist locations (ActiGraph GT9X Link, GENEActiv, RT6). Expired gas was sampled during the five activities (MetaMax 3B). Correlational analysis assessed the relationship between accelerometer devices and METs/VO2. Receiver Operating Characteristic Curves analysis were used to calculate area under the curve and define cut-points for physical activity intensities. Results: The RT6 demonstrated criterion and convergent validity (r = 0.662–0.966, P < .05). RT6 generally performed good to excellent across activity intensities and monitor position (sedentary [AUC = 0.862–0.911], moderate [AUC = 0.849–0.830], vigorous [AUC = 0.872–0.877]) for non-dominant and dominant position, respectively. Cut-points were derived across activity intensities for non-dominant- and dominant-worn RT6 devices. Comparison of the RT6 derived cut-points identified appropriate agreement with comparative tools but yields the strongest agreement with the ActiGraph monitor at the hip location during sedentary, light, and moderate activity. Conclusion: The RT6 performed similar to the ActiGraph and GENEActiv and is capable of classifying the intensity of physical activity in young adults. As such this may offer a more useable tool for understanding current physical activity levels and in intervention studies to monitor and track changes without the excessive need for downloading and making complex analysis, especially given the option to view energy expenditure data while wearing it. The RT6 should be placed on the dominant hip when determining activities that are sedentary, moderate, or vigorous intensity.

Pedometer Steps-Per-Minute, Moderate Intensity, and Individual Differences in 12- to 14-Year-Old Youth

2011 ◽  
Vol 8 (2) ◽  
pp. 272-278 ◽  
Author(s):  
Susan Vincent Graser ◽  
Alan Groves ◽  
Keven A. Prusak ◽  
Todd R. Pennington
Keyword(s):  
Physical Activity ◽  
Heart Rate ◽  
Individual Differences ◽  
Moderate Intensity ◽  
Moderate Physical Activity ◽  
Moderate Activity ◽  
Heart Rate Monitor ◽  
Activity Intensity ◽  
Intensity Threshold ◽  
The Impact

Background:Researchers have noted both the utility and limitations of using pedometers to measure physical activity (PA). While these unobtrusive devices are widely accepted for their ability to measure accumulated PA, they have been criticized for their inability to measure exercise intensity. However, recent steps-per-minute (SPM) research provides reasonably accurate measures of intensity allowing users to assess time spent at recommended PA levels. Therefore, the purpose of this study was to determine the SPM taken that are associated with moderate physical activity in 12- to 14-year-old youth.Methods:Ninety-three participants (49 boys and 44 girls; ages 12 to 14) walked on a treadmill for 3 minutes at each of 4 different speeds while wearing a pedometer and a heart rate monitor.Results:On average boys and girls reached their moderate activity intensity threshold at 122 SPM and 102 SPM, respectively. However, individual differences must be taken into account when determining appropriate SPM intensities for youth.Conclusions:The impact of individual differences underscores the need to address SPM for moderate intensity individually rather than with a single guideline for everyone at this age.

Effect of combined movement and heart rate monitor placement on physical activity estimates during treadmill locomotion and free-living

2005 ◽  
Vol 96 (5) ◽  
pp. 517-524 ◽  
Author(s):  
Søren Brage ◽  
Niels Brage ◽  
Ulf Ekelund ◽  
Jian’an Luan ◽  
Paul W. Franks ◽  
...  
Keyword(s):  
Physical Activity ◽  
Heart Rate ◽  
Free Living ◽  
Heart Rate Monitor ◽  
Treadmill Locomotion

The Effect of Changes to Question Order on the Prevalence of ‘Sufficient’ Physical Activity in an Australian Population Survey

2013 ◽  
Vol 10 (3) ◽  
pp. 390-396
Author(s):  
Christine Hanley ◽  
Mitch J. Duncan ◽  
W. Kerry Mummery
Keyword(s):  
Physical Activity ◽  
Binary Logistic Regression ◽  
Total Activity ◽  
Order Effects ◽  
Computer Assisted ◽  
Moderate Activity ◽  
Question Order ◽  
Recreational Walking ◽  
Cati Survey ◽  
The Impact

Background:Population surveys are frequently used to assess prevalence, correlates and health benefits of physical activity. However, nonsampling errors, such as question order effects, in surveys may lead to imprecision in self reported physical activity. This study examined the impact of modified question order in a commonly used physical activity questionnaire on the prevalence of sufficient physical activity.Methods:Data were obtained from a telephone survey of adults living in Queensland, Australia. A total of 1243 adults participated in the computer-assisted telephone interview (CATI) survey conducted in July 2008 which included the Active Australia Questionnaire (AAQ) presented in traditional or modified order. Binary logistic regression analyses was used to examine relationships between question order and physical activity outcomes.Results:Significant relationships were found between question order and sufficient activity, recreational walking, moderate activity, vigorous activity, and total activity. Respondents who received the AAQ in modified order were more likely to be categorized as sufficiently active (OR = 1.28, 95% CI 1.01−1.60).Conclusions:This study highlights the importance of question order on estimates of self reported physical activity. This study has shown that changes in question order can lead to an increase in the proportion of participants classified as sufficiently active.

scholarly journals Feasibility of a Commercially Available Virtual Reality System to Achieve Exercise Guidelines in Youth With Spina Bifida: Mixed Methods Case Study (Preprint)

2020 ◽  
Author(s):  
Byron Lai ◽  
Drew Davis ◽  
Mai Narasaki-Jara ◽  
Betsy Hopson ◽  
Danielle Powell ◽  
...  
Keyword(s):  
Physical Activity ◽  
Heart Rate ◽  
Virtual Reality ◽  
Spina Bifida ◽  
Moderate Intensity ◽  
Full Time ◽  
Heart Rate Monitor ◽  
Intervention Protocol ◽  
Exercise Guidelines ◽  
Total Average

BACKGROUND Access to physical activity among youth with spina bifida (SB) is much lower than it is for children without disability. Enjoyable home-based exercise programs are greatly needed. OBJECTIVE Our objective is to examine the feasibility of a virtual reality (VR) active video gaming system (ie, bundle of consumer-available equipment) to meet US physical activity guidelines in two youth with SB. METHODS Two youth with SB—a 12-year-old female and a 13-year-old male; both full-time wheelchair users—participated in a brief, 4-week exercise program using a popular VR head-mounted display: Oculus Quest (Facebook Technologies). The system included a Polar H10 (Polar Canada) Bluetooth heart rate monitor, a no-cost mobile phone app (VR Health Exercise Tracker [Virtual Reality Institute of Health and Exercise]), and 13 games. The intervention protocol was conducted entirely in the homes of the participants due to the coronavirus disease 2019 (COVID-19) pandemic. The VR system was shipped to participants and they were instructed to do their best to complete 60 minutes of moderate-intensity VR exercise per day. Exercise duration, intensity, and calories expended were objectively monitored and recorded during exercise using the heart rate monitor and a mobile app. Fatigue and depression were measured via self-report questionnaires at pre- and postintervention. Participants underwent a semistructured interview with research staff at postintervention. RESULTS Across the intervention period, the total average minutes of all exercise performed each week for participants 1 and 2 were 281 (SD 93) and 262 (SD 55) minutes, respectively. The total average minutes of moderate-intensity exercise performed per week for participants 1 and 2 were 184 (SD 103) (184/281, 65.4%) and 215 (SD 90) (215/262, 82.1%) minutes, respectively. One participant had a reduction in their depression score, using the Quality of Life in Neurological Disorders (Neuro-QoL) test, from baseline to postintervention, but no other changes were observed for fatigue and depression scores. Participants reported that the amount of exercise they completed was far higher than what was objectively recorded, due to usability issues with the chest-worn heart rate monitor. Participants noted that they were motivated to exercise due to the enjoyment of the games and VR headset as well as support from a caregiver. CONCLUSIONS This study demonstrated that two youth with SB who used wheelchairs could use a VR system to independently and safely achieve exercise guidelines at home. Study findings identified a promising protocol for promoting exercise in this population and this warrants further examination in future studies with larger samples.

Effets du statut socioéconomique sur l'activité physique d'enfants prépubères

2003 ◽  
Vol 28 (2) ◽  
pp. 190-203 ◽  
Author(s):  
Alexandre Melin ◽  
Philippe Obert ◽  
Pierre Bonnet ◽  
Daniel Courteix
Keyword(s):  
Physical Activity ◽  
Heart Rate ◽  
Socioeconomic Status ◽  
Normal Subjects ◽  
Habitual Physical Activity ◽  
Heart Rate Reserve ◽  
Statut Socioéconomique ◽  
The Mean ◽  
And Gender ◽  
Daily Time

In order to assess possible influences of socioeconomic status and gender on habitual physical activity (HPA) of prepubertal French children, daily heart rate was 24-hr-monitored in 65 normal subjects for 2 days in the same school week. HPA was evaluated as the mean daily time spent at heart rates greater than 140 bpm (tFC > 140), 160 bpm (tFC > 160), 50% (tFC > 50%), and 70% (tFC > 70%) of the heart rate reserve. An effect of socioeconomic status (determined by questionnaire) was found in boys, with HPA being greater in the underprivileged ones (tFC > 140: 51.8 ± 30.1 vs 33.0 ± 14.1 min, p < .05; tFC > 160: 22.7 ± 16.6 vs 11.1 ± 7.4 min, p < .05; tFC > 50%: 61.4 ± 33.5 vs 46.5 ± 17.1 min, p < .06; tFC > 70%: 20.1 ± 15.2 vs 10.6 ± 7.1, p < .05). Boys were more active than girls, but only in the underprivileged group (tFC > 140: 51.8 ± 30.1 vs 32.8 ± 26.0 min, tFC > 160: 22.7 ± 16.6 vs 9.9 ± 8.2 min, p < .05; tFC > 50%: 61.4 ± 33.5 vs 37.4 ± 23.8 min, p < .05; tFC > 70%: 20.1 ± 15.2 vs 8.1 ± 6.3, p < .05). Cultural factors could be involved in these results. Key words: habitual physical activity, heart rate, heart rate meter, gender, energy expenditure

Physical Activity Patterns of Free Living Dogs Diagnosed with Osteoarthritis

2021 ◽  
Author(s):  
Anne H Lee ◽  
Katelyn B Detweiler ◽  
Tisha A Harper ◽  
Kim E Knap ◽  
Maria R C de Godoy ◽  
...  
Keyword(s):  
Physical Activity ◽  
Pain Intensity ◽  
Repeated Measures ◽  
Pearson Correlation ◽  
Clinical Signs ◽  
Total Activity ◽  
Activity Count ◽  
Free Living ◽  
Activity Monitors ◽  
Average Activity

Abstract Osteoarthritis (OA) affects about 90% of dogs &gt; 5 yr of age in the US, resulting in reduced range of motion, difficulty climbing and jumping, reduced physical activity, and lower quality of life. Our objective was to use activity monitors to measure physical activity and identify how activity counts correlate with age, body weight (BW), body condition score (BCS), serum inflammatory markers, veterinarian pain assessment, and owner perception of pain in free-living dogs with OA. The University of Illinois Institutional Animal Care and Use Committee approved the study and owner consent was received prior to experimentation. Fifty-six client-owned dogs (mean age = 7.8 yr; mean BCS = 6.1) with clinical signs and veterinary diagnosis of OA wore HeyRex activity collars continuously over a 49-d period. Blood samples were collected on d 0 and 49, and dog owners completed canine brief pain inventory (CBPI) and Liverpool osteoarthritis in dogs (LOAD) surveys on d 0, 21, 35, and 49. All data were analyzed using SAS 9.3 using repeated measures and R Studio 1.0.136 was used to generate Pearson correlation coefficients between data outcomes. Average activity throughout the study demonstrated greater activity levels on weekends. It also showed that 24-h activity spiked twice daily, once in the morning and another in the afternoon. Serum C-reactive protein concentration was lower (P &lt; 0.01) at d 49 compared to d 0. Survey data indicated lower (P &lt; 0.05) overall pain intensity and severity score on d 21, 35 and 49 compared to d 0. BW was correlated with average activity counts (p=0.02; r=-0.12) and run activity (p=0.10; r=-0.24). Weekend average activity counts were correlated with owner pain intensity scores (p=0.0813; r=-0.2311), but weekday average activity count was not. Age was not correlated with total activity count, sleep activity, or run activity, but it was correlated with scratch (p=0.03; r=-0.10), alert (p=0.03; r=-0.13) and walk (p=0.09; r=-0.23) activities. Total activity counts and activity type (sleep, scratch, alert, walk, run) were not correlated with pain scored by veterinarians, pain intensity or severity scored by owners, or baseline BCS. Even though the lack of controls and/or information on the individual living conditions of dogs resulted in a high level of variability in this study, our data suggest that the use of activity monitors have the potential to aid in the management of OA and other conditions affecting activity (e.g., allergy; anxiety).

scholarly journals Validation of the IPAQ Against Different Accelerometer Cut-Points in Older Cancer Survivors and Adults at Risk of Cancer

2018 ◽  
Vol 26 (1) ◽  
pp. 34-40 ◽  
Author(s):  
Liane S. Lewis ◽  
James Hernon ◽  
Allan Clark ◽  
John M. Saxton
Keyword(s):  
Convergent Validity ◽  
Leisure Time ◽  
Sedentary Time ◽  
Free Living ◽  
Cut Points ◽  
Movement Data ◽  
Males And Females ◽  
Accelerometer Cut Points ◽  
Risk Of Cancer ◽  
Walking Time

The present study investigated the convergent validity of an interview-administered IPAQ long version (IPAQ-L) in an older population by comparison with objective accelerometry movement data. Data from 52 participants (mean age 67.9 years, 62% male) were included in the analysis. Treadmill derived (TM-ACC: 1,952–5,724 cpm) and free-living physical activity (PA) derived (FL-ACC: 760–5,724 cpm) accelerometer cut-points were used as criterion. IPAQ-L measures (total PA, leisure-time, walking-time, sedentary time) were significantly correlated with accelerometry (P ≤ .05). Differences in sex were observed. Bland-Altman Limits of Agreement analysis showed that the IPAQ-L overestimated PA in relation to accelerometry. Our results show that an interview-administered IPAQ-L shows low to moderate convergent validity with objective PA measures in this population but there may be differences between males and females which should be further investigated.

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