ArticleBMC medical research methodology2012
The use of individual cut points from treadmill walking to assess free-living moderate to vigorous physical activity in obese subjects by accelerometry: is it useful?
Article in BMC medical research methodology, 2012. 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.
- Data Analytics in Physical Activity Studies With Accelerometers: Scoping Review.Journal of medical Internet research · 2024Article
- Criterion validity of The International Physical Activity Questionnaire-Short Form (IPAQ-SF) for use in clinical practice in patients with osteoarthritis.BMC musculoskeletal disorders · 2021Article
- Calibration and validation of accelerometry using cut-points to assess physical activity in paediatric clinical groups: A systematic review.Preventive medicine reports · 2020Review
- Calibration and validation of accelerometry to measure physical activity in adult clinical groups: A systematic review.Preventive medicine reports · 2019Review
- The number of repeated observations needed to estimate the habitual physical activity of an individual to a given level of precision.PloS one · 2018Article
- Measuring moderate-intensity walking in older adults using the ActiGraph accelerometer.BMC geriatrics · 2016Article
- Investigating the Physiological and Psychosocial Responses of Single- and Dual-Player Exergaming in Young Adults.Games for health journal · 2016Article
- Validity of treadmill- and track-based individual calibration methods for estimating free-living walking speed and VO2 using the Actigraph accelerometer.BMC sports science, medicine & rehabilitation · 2015Article
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2 authors.
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Abstract
backgroundVariation in counts between subjects at a given speed or work rate are the most important source of error in physical activity (PA) measurements with accelerometers. The aim of this study was to explore how the use of individual accelerometer cut points (ICPs) affected the analysis of PA field data.
methodsWe performed a treadmill calibration protocol to determine cut points for moderate to vigorous PA (MVPA) (≥3 metabolic equivalents) and assessed free-living PA in 44 severely obese subjects using the Actigraph GT1M accelerometer. We obtained cut points in 42 subjects (11 men, mean (standard deviation) of body mass index (BMI) 39.8 (5.7), age 43.2 (9.2) years), of whom 35 had valid measurement of free-living PA (minutes of MVPA/day). Linear regression was used to analyze associations with the ICPs and time in MVPA/day. MVPA/day was also compared with values derived using a group cut point (GCP).
resultsResting oxygen consumption (partial r = 0.74, p < .001), work economy (partial r = -0.76, p < .001) and BMI (partial r = 0.52, p = .001) explained 68.4% of the variation in the ICPs (F = 26.7, p < .001). The ICPs explained 79.1% of the variation in the minutes spent in MVPA/day. Moderate to vigorous PA/day derived from the ICPs vs. the GCP varied substantially (R2 = 14%, p = .023, coefficient of variation = 45.1%).
conclusionsThe results indicate that the use of ICPs had a strong influence on the PA level. Two thirds of the variation in the ICPs could be explained, however, a certain degree of measurement error will be present. Thus, we are not able to conclude with respect to the most appropriate procedure for analyzing time in MVPA.
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