Physical activity levels of older community-dwelling adults are influenced by summer weather variables

Brandon, Caitlin A. BrandonC.A.; Gill, Dawn P.; Speechley, Mark; Gilliland, Jason A.; Jones, Gareth R.

doi:10.1139/h09-004

Cited by 42 publications

(39 citation statements)

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“…Many studies have used self-report accounts of physical activity that are subject to recall biases [27]. Objective measures of physical activity, including accelerometry, provide more accurate measurements but are subject to variability due to different factors including weather and season [28]. Our results demonstrated that ambulatory physical activity can be reliably measured using an accelerometer despite such influences.…”

Section: Discussionmentioning

confidence: 69%

Developing an estimate of daily cumulative loading for the knee: Examining test–retest reliability

et al. 2009

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Section: Discussionmentioning

confidence: 69%

Developing an estimate of daily cumulative loading for the knee: Examining test–retest reliability

et al. 2009

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“…Current literature demonstrates a small but statistically significant effect of weather variables on daily PA in various populations including COPD (5), community dwelling elderly (6-7-8-9), healthy adults (10-11-12), and functionally impaired elderly (13). However, within these studies, there is wide variation in the definition of daily PA (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Similarly, in 41 Japanese community dwelling healthy elderly, step count increased within an ambient temperature range of -2°C to 17°C and decreased over a range of 17°C to 29°C (8). In community dwelling elderly in Canada, daily PA peaked at 20°C and decreased with temperatures above 30°C (6). Although these studies indicate a potential effect of weather on daily PA levels, there is no agreement regarding the thresholds for temperature and temperature change that result in changes in daily PA.…”

Section: Introductionmentioning

confidence: 99%

“…All but two studies (12, 15) utilized objective measurement of PA, although there was a wide variety of instrumentation for measuring activity, including the Yamax Digi-Walker (5), ActiGraph (6, 11), RT3 Triaxial accelerometer (9, 13), activPAL (7), and Yamax SW-200 (10, 15). The amount of time the devices were worn varied greatly from 7-450 days as did device placement, including the lateral hip, anterior hip, or thigh.…”

Section: Introductionmentioning

confidence: 99%

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Seasonal Variation of Daily Physical Activity in Individuals with Heart Failure

Shoemaker

Roper

Calkins

2016

Heart International

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BackgroundPrevious studies indicate that seasonal variation affects daily physical activity (PA), but none have investigated this relationship in individuals with heart failure (HF) who also have implanted cardioverter defibrillators and cardiac resynchronization therapy (ICD/CRT) devices. The purpose of the present study was to determine if seasonal variation in temperature affects daily PA in patients with HF and ICD/CRTs.Patients and methodsSecondary analysis of data from 16 subjects with HF and Medtronic® ICD/CRT devices enrolled in a randomized trial investigating interventions to improve daily PA. Due to the rolling study enrollment, daily PA data for all subjects were not available for the entire time frame and were divided into two groups. Determination of seasonal variation of daily PA was determined using visual analysis of daily PA plotted with average temperature, autocorrelation, visual analysis of seasonal subseries plots and boxplot analysis, as well as Wilcoxon signed-rank tests.ResultsSubjects 1-8 demonstrated the greatest differences in daily PA during periods of seasonal transition whereas subjects 9-16 demonstrated the greatest variation in daily PA with greatest seasonal temperature difference. Wilcoxon signed-rank testing of the lowest and highest months for daily PA revealed median differences of 0.30 (p = 0.050) and 0.36 hours (p = 0.036) for subjects 1-8 and 9-16, with effect sizes of 0.69 and 0.74, respectively.ConclusionsSeasonal variation in mean temperature appears to affect daily PA in individuals with HF and ICD/CRT devices by a magnitude of 0.30-0.36 hours, which may need to be accounted for in future research investigating interventions to improve daily PA.

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“…9,24-26 However, studies using accelerometers to capture PA have found a decline in PA with extreme heat, 11,26 specifically, a decline in PA at temperatures >30 C among older adults in Canada and a decline in PA over a range from 17 C to 29 C among older adults in Japan. 11,26 We collected data over two fall/winter seasons and one spring/summer season in a region of Ontario, Canada, where outdoor maximum temperature ranged from À6.5 C to 27.6 C; temperatures were likely not high enough to demonstrate a decrease in PA during hot days. Nevertheless, both healthy adults and adults with knee OA appear to be more active when outdoor temperatures are moderate.…”

Section: Discussionmentioning

confidence: 99%

Quantity and Quality of Physical Activity Are Influenced by Outdoor Temperature in People with Knee Osteoarthritis

Robbins

Jones

Birmingham

et al. 2013

Physiotherapy Canada

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Purpose: Environmental factors are known to influence physical activity (PA) levels of healthy people, but little work has explored these factors in people with osteoarthritis (OA). The purpose of this study was to explore the influence of outdoor temperature on PA in people with knee OA. Methods: A total of 38 people with knee OA (10 women; mean age 54 y) wore an accelerometer around their waist for 7 consecutive days. Dependent variables from the accelerometers were three PA measures: (1) activity counts/day and time spent at or above moderate levels of PA with (2) a cut-point of 1,041 activity counts/minute (MVPA 1041 ) and (3) a cut-point of 1,952 activity counts/minute (MVPA 1952 ). Independent variables were age, sex, body mass index (BMI), and maximum daily outdoor temperature. Three linear regression analyses were conducted using the three PA dependent variables and independent variables. Results: After controlling for age, sex, and BMI, maximum daily outdoor temperature explained 9% of the variance in activity counts/day (p ¼ 0.042), 10% of variance in MVPA 1041 (p ¼ 0.032), and 14% of variance in MVPA 1952 (p ¼ 0.016). Participants who engaged in more PA were younger and were exposed to warmer temperatures. Conclusions: Outdoor temperature and age influence the PA levels of people with knee OA. These factors should be considered when designing PA programmes.Key Words: knee osteoarthritis; motor activity; temperature; weather. Knee osteoarthritis (OA) has numerous physical consequences, including a decrease in physical activity (PA). 1 In a study by Farr and colleagues, only one-third of individuals with knee OA met the minimum recommendation of 30 minutes of moderate-intensity PA 5 days a week. 2 Furthermore, the frequency and intensity of PA in women with hip or knee OA have been shown to be lower than in healthy controls. 1 These findings are 248From the:

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Physical activity levels of older community-dwelling adults are influenced by summer weather variables

Cited by 42 publications

References 41 publications

Developing an estimate of daily cumulative loading for the knee: Examining test–retest reliability

Developing an estimate of daily cumulative loading for the knee: Examining test–retest reliability

Seasonal Variation of Daily Physical Activity in Individuals with Heart Failure

Quantity and Quality of Physical Activity Are Influenced by Outdoor Temperature in People with Knee Osteoarthritis

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