ArticleBMC sports science, medicine & rehabilitation2015
Validity of treadmill- and track-based individual calibration methods for estimating free-living walking speed and VO2 using the Actigraph accelerometer.
Article in BMC sports science, medicine & rehabilitation, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed, 21 citations in OpenAlex.
- Adaptive Goals and Reinforcement Timing to Increase Physical Activity in Adults: A Factorial Randomized Trial.American journal of preventive medicine · 2022Trial
- Walkability around the worksite and self-reported and accelerometer-measured physical activity among adults.Health & place · 2024Article
- Performance of Different Accelerometry-Based Metrics to Estimate Oxygen Consumption during Track and Treadmill Locomotion over a Wide Intensity Range.Sensors (Basel, Switzerland) · 2023Article
- Is Wrist Accelerometry Suitable for Threshold Scoring? A Comparison of Hip-Worn and Wrist-Worn ActiGraph Data in Low-Active Older Adults With Obesity.The journals of gerontology. Series A, Biological sciences and medical sciences · 2022Article
- Accuracy of the energy expenditure during uphill exercise measured by the Waist-worn ActiGraph.Journal of exercise science and fitness · 2019Article
- Physical activity and sedentary behavior during pregnancy and postpartum, measured using hip and wrist-worn accelerometers.Preventive medicine reports · 2018Article
- Using open source accelerometer analysis to assess physical activity and sedentary behaviour in overweight and obese adults.BMC public health · 2018Article
- Usefulness of motion sensors to estimate energy expenditure in children and adults: a narrative review of studies using DLW.European journal of clinical nutrition · 2017Review
- Measuring moderate-intensity walking in older adults using the ActiGraph accelerometer.BMC geriatrics · 2016Article
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Authors and funding
5 authors at 4 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundFor many patients clinical prescription of walking will be beneficial to health and accelerometers can be used to monitor their walking intensity, frequency and duration over many days. Walking intensity should include establishment of individual specific accelerometer count, walking speed and energy expenditure (VO2) relationships and this can be achieved using a walking protocol on a treadmill or overground. However, differences in gait mechanics during treadmill compared to overground walking may result in inaccurate estimations of free-living walking speed and VO2. The aims of this study were to compare the validity of track- and treadmill-based calibration methods for estimating free-living level walking speed and VO2 and to explain between-method differences in accuracy of estimation.
methodsFifty healthy adults [32 women and 18 men; mean (SD): 40 (13) years] walked at four pre-determined speeds on an outdoor track and a treadmill, and completed three 1-km self-paced level walks while wearing an Actigraph monitor and a mobile oxygen analyser. Speed- and VO2-to-Actigraph count individual calibration equations were computed for each calibration method. Between-method differences in calibration equation parameters, prediction errors, and relationships of walking speed with VO2 and Actigraph counts were assessed.
resultsThe treadmill-calibration equation overestimated free-living walking speed (on average, by 0.7 km · h(-1)) and VO2 (by 4.99 ml · kg(-1) · min(-1)), while the track-calibration equation did not. This was because treadmill walking, from which the calibration equation was derived, produced lower Actigraph counts and higher VO2 for a given walking speed compared to walking on a track. The prediction error associated with the use of the treadmill-calibration method increased with free-living walking speed. This issue was not observed when using the track-calibration method.
conclusionsThe proposed track-based individual accelerometer calibration method can provide accurate and unbiased estimates of free-living walking speed and VO2 from walking. The treadmill-based calibration produces calibration equations that tend to substantially overestimate both VO2 and speed.
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