The validity and reliability of a novel activity monitor as a measure of walking

Ryan, Cormac

doi:10.1136/bjsm.2006.027276

Cited by 405 publications

(349 citation statements)

References 25 publications

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“…[39][40][41] Previous research using pedometers has related step counts to risks. In the present study, using 282 the activPAL which is more accurate and reliable than pedometers in measuring steps 29 , we found 283 that waist circumference and 10-y PROCAM risk were associated with step count in unadjusted 284 data, but not after adjustments. The presence of the metabolic syndrome was significantly 285 associated with daily step count.…”

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confidence: 75%

Time spent in sedentary posture is associated with waist circumference and cardiovascular risk

et al. 2017

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Time spent in sedentary posture is associated with waist circumference and cardiovascular risk. International Journal of Obesity. Permanent WRAP URL:http://wrap.warwick.ac.uk/86976 Copyright and reuse:The Warwick Research Archive Portal (WRAP) makes this work by researchers of the University of Warwick available open access under the following conditions. Copyright © and all moral rights to the version of the paper presented here belong to the individual author(s) and/or other copyright owners. To the extent reasonable and practicable the material made available in WRAP has been checked for eligibility before being made available.Copies of full items can be used for personal research or study, educational, or not-for-profit purposes without prior permission or charge. Provided that the authors, title and full bibliographic details are credited, a hyperlink and/or URL is given for the original metadata page and the content is not changed in any way. The version presented here may differ from the published version or, version of record, if you wish to cite this item you are advised to consult the publisher's version. Please see the 'permanent WRAP URL' above for details on accessing the published version and note that access may require a subscription.

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confidence: 75%

Time spent in sedentary posture is associated with waist circumference and cardiovascular risk

et al. 2017

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“…As the activPAL data from day 1 did not cover the entire day, only activPAL data from the last 72 h of each regimen were analysed. This accelerometer accurately discriminates between time spent inactive (sitting or lying), standing and walking [19], giving step number and cadence [20]. Diary data for self-reported physical activity were compared with the activPAL data after the first and third days of each activity regimen to formulate tailor-made instructions on how to alter daily activities in order to guarantee optimal compliance with each activity regimen.…”

Section: Methodsmentioning

confidence: 99%

Breaking sitting with light activities vs structured exercise: a randomised crossover study demonstrating benefits for glycaemic control and insulin sensitivity in type 2 diabetes

et al. 2016

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Aims/hypothesis We aimed to examine the effects of breaking sitting with standing and light-intensity walking vs an energy-matched bout of structured exercise on 24 h glucose levels and insulin resistance in patients with type 2 diabetes. Methods In a randomised crossover study, 19 patients with type 2 diabetes (13 men/6 women, 63 ± 9 years old) who were not using insulin each followed three regimens under free-living conditions, each lasting 4 days: (1) Sitting: 4415 steps/day with 14 h sitting/day; (2) Exercise: 4823 steps/day with 1.1 h/day of sitting replaced by moderate-to vigorous-intensity cycling (at an intensity of 5.9 metabolic equivalents [METs]); and (3) Sit Less: 17,502 steps/day with 4.7 h/day of sitting replaced by standing and light-intensity walking (an additional 2.5 h and 2.2 h, respectively, compared with the hours spent doing these activities in the Sitting regimen). Blocked randomisation was performed using a block size of six regimen orders using sealed, non-translucent envelopes. Individuals who assessed the outcomes were blinded to group assignment. Meals were standardised during each intervention. Physical activity and glucose levels were assessed for 24 h/day by accelerometry (activPAL) and a glucose monitor (iPro2), respectively. The incremental AUC (iAUC) for 24 h glucose (primary outcome) and insulin resistance (HOMA2-IR) were assessed on days 4 and 5, respectively. Results The iAUC for 24 h glucose (mean ± SEM) was significantly lower during the Sit Less intervention than in Sitting (1263 ± 189 min × mmol/l vs 1974 ± 324 min × mmol/l; p = 0.002), and was similar between Sit Less and Exercise (Exercise: 1383 ± 194 min × mmol/l; p = 0.499). Exercise failed to improve HOMA2-IR compared with Sitting (2.06 ± 0.28 vs 2.16 ± 0.26; p = 0.177). In contrast, Sit Less (1.89 ± 0.26) significantly reduced HOMA2-IR compared with Exercise (p = 0.015) as well as Sitting (p = 0.001). Conclusions/interpretation Breaking sitting with standing and light-intensity walking effectively improved 24 h glucose levels and improved insulin sensitivity in individuals with type 2 diabetes to a greater extent than structured exercise. Thus, our results suggest that breaking sitting with standing and light-intensity walking may be an alternative to structured exercise to promote glycaemic control in patients type 2 diabetes.

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“…This monitor can measure activity for up to 10 days and provides the same outcomes as the uni-axial activPAL physical activity monitor (PAL Technologies Ltd), which was previously used in the wheelchair population, 11 and is a valid and reliable instrument for measuring continuous upright activity. 12 The tri-axial accelerometer has the additional benefits of detecting the absolute angle of the rear wheel and the direction of movement. For the purpose of this study, the tri-axial accelerometer was secured to the spokes of a manual wheelchair using a thin sheet of plastic backing and tape or to the inner circumference of a powered wheelchair using double-sided tape.…”

Section: Instrumentmentioning

confidence: 99%

Development and validation of a physical activity monitor for use on a wheelchair

et al. 2010

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Study design: Keeping physically active is important for people who mobilize using a wheelchair. However, current tools to measure physical activity in the wheelchair are either not validated or limited in their application. The purpose of this study was to develop and validate a monitoring system to measure wheelchair movement. Methods: The system developed consisted of a tri-axial accelerometer placed on the wheel of a wheelchair and an analysis algorithm to interpret the acceleration signals. The two accelerometer outputs in the plane of the wheel were used to calculate the angle of the wheel. From this, outcome measures of wheel revolutions, absolute angle and duration of movement were derived and the direction of movement (forwards or backwards) could be distinguished. Concurrent validity was assessed in comparison with video analysis in 14 people with spinal cord injury using their wheelchair on an indoor track and outdoor wheelchair skills course. Validity was assessed using intraclass correlation coefficients (ICC(2,1)) and Bland-Altman plots.Results: The monitoring system demonstrated excellent validity for wheel revolutions, absolute angle and duration of movement (ICC(2,1)40.999, 0.999, 0.981, respectively) in both manual and powered wheelchairs, when the wheelchair was propelled forwards and backwards, and for movements of various durations. Conclusion: This study has found this monitoring system to be an accurate and objective tool for measuring detailed information on wheelchair movement and manoeuvring regardless of the propulsion technique, direction and speed.

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The validity and reliability of a novel activity monitor as a measure of walking

Cited by 405 publications

References 25 publications

Time spent in sedentary posture is associated with waist circumference and cardiovascular risk

Time spent in sedentary posture is associated with waist circumference and cardiovascular risk

Breaking sitting with light activities vs structured exercise: a randomised crossover study demonstrating benefits for glycaemic control and insulin sensitivity in type 2 diabetes

Development and validation of a physical activity monitor for use on a wheelchair

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