Validity of accelerometry for the assessment of moderate intensity physical activity in the field

Hendelman, D.; Miller, Kelly J.; Baggett, Christopher D.; Debold, Edward P.; Freedson, Patty S.

doi:10.1097/00005768-200009001-00002

Cited by 624 publications

(585 citation statements)

References 18 publications

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“…No women fell within the moderate-intensity activity category on any occasion using the cut points of X574 (Swartz et al, 2000) and X1952 (Freedson et al 1998). Only the lower cut point of X191 (Hendelman et al, 2000) identified individuals with activity of moderate intensity or above. Table 5 shows the Pearson correlation coefficients for each assessment when activity was subdivided into low and moderate-high categories using the Hendelman cut-point.…”

Section: Resultsmentioning

confidence: 99%

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Significant changes in physical activity among pregnant women in the UK as assessed by accelerometry and self-reported activity

2005

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Objective: Research on the impact of maternal physical activity on pregnancy outcomes has often employed subjective measures of physical activity obtained by diary or questionnaire. This study investigates the feasibility of using accelerometry as an objective measure of physical activity of pregnant women compared with subjective data obtained via activity recall among pregnant women. Design: Activity data were collected prospectively on 57 women at 12, 16, 25, 34 and 38 weeks of gestation. Total daily physical activity was assessed by ambulatory accelerometer and activity interview (self-report). Maternal personality variables (health value, extroversion) were assessed by established scales. Setting: Leicestershire, UK. Subjects: Pregnant women were recruited by voluntary participation via antenatal booking clinics. In all, 64 pregnant women with low-risk pregnancy were enrolled onto the study, of whom 57 completed the study. Results: Mean 24 h physical activity levels (PAL) decreased significantly from second to third trimester as assessed by self-report interview (1.51-1.29 Metabolic Equivalent TEE-h/day, Po0.01) and accelerometry (200.05-147.42 counts/min, Po0.01). The correlation between the two measures declined as pregnancy progressed (r value ranging from 0.55 to 0.08). Compliance with the accelerometers declined from 90% at 12 weeks to 47% at 34 weeks (Po0.01). Compliance with the self-report interviews was 100%. Those who fully complied with the accelerometry demonstrated a significantly higher health value (Po0.05) and a significantly greater level of extroversion (Po0.05) than those who did not. Conclusions: Accelerometers and self-reported activity interviews both indicated a significant decline in PAL during pregnancy. Although subjects showed a willingness to use both methods, accelerometers resulted in variable compliance with 72 h monitoring. Both techniques may be limited by the need to measure low levels of physical activity during the third trimester. Sponsorship: Cambridge Neurotechnology Ltd, UK, assisted with the provision of Actiwatch accelerometers.

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Section: Resultsmentioning

confidence: 99%

“…Compliance with the accelerometers was encouraged by visiting the home of every participant at the time of assessment. The significant association between participant compliance and maternal health value suggests Using cut-point of X191 counts/min (Hendelman et al, 2000). **Po0.001.…”

Section: Discussionmentioning

confidence: 98%

Significant changes in physical activity among pregnant women in the UK as assessed by accelerometry and self-reported activity

2005

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“…However, accelerometers are known to underestimate physical activity at specific activities, and this may lead to an underestimation of total energy expenditure. [22][23][24] As accelerometers can only provide information about acceleration, …”

Section: Discussionmentioning

confidence: 99%

“…14 The use of these cutoff points in field studies has been criticized. 23,25,26 It seems that when establishing cutoff points, the results are affected by the types of activities and the settings in which the calibration between activity counts and energy expenditure estimates is performed. 27 In this study, it is mostly ambulatory activity that is captured by the cut points used, meaning that the results have to be interpreted carefully.…”

Section: Validation Of the Ipaq In Adolescentsmentioning

confidence: 99%

Concurrent validity of a modified version of the International Physical Activity Questionnaire (IPAQ-A) in European adolescents: The HELENA Study

et al. 2008

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Introduction: The International Physical Activity Questionnaire (IPAQ) was developed to measure health-enhancing physical activity in adult populations. This study explores the concurrent validity of a modified version of the long IPAQ (the IPAQ-A) for the assessment of physical activity among adolescents. Participants and methods: In total, 248 healthy adolescents, divided into one older and one younger age group (aged 15-17 years (N ¼ 188) and 12-14 years (N ¼ 60), respectively) from nine Healthy Lifestyle by Nutrition in Adolescence (HELENA) Study centres across Europe, voluntarily participated in the study. Data on total physical activity, as well as activities in different intensities derived from the IPAQ-A, were compared using Spearman's correlation coefficient and Bland-Altman analysis, with data from an accelerometer. Tertiles of total physical activity for the IPAQ-A and the accelerometer were compared using Kendall's tau-b. Results: For the older age group, significant correlations between the instruments were found for time spent walking, for moderate and vigorous activities as well as for total physical activity (Rs ¼ 0.17-0.30, Po0.05). No significant correlations were found for any of the variables studied in the younger age group. Kendall's tau-b showed low but significant correlations for tertiles of total physical activity (Po0.001). Conclusions: The IPAQ-A has reasonable validity properties for assessing activities in different intensities and for total physical activity in healthy European adolescents aged 15-17 years. For adolescents aged 14 years and younger, the correlations were unsatisfactorily low and objective methodology, such as accelerometry, may be the appropriate alternative.

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“…One MET is equivalent to the energy expenditure for sitting quietly. Moderate activity is equal to between 3.0 and 6.0 METs (Hendelman, Miller, Baggett, Debold, & Freedson, 2000).…”

Section: Review Of the Literaturementioning

confidence: 99%

An intervention to prevent symptoms associated with hepatitis C: a pilot study

Zucker

2010

Applied Nursing Research

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The objectives of this study were to (a) pilot test instruments measuring fatigue and quality of life (QOL); (b) pilot test an exercise intervention; and (c) estimate the effect size of this intervention relative to completion of combination therapy, fatigue, QOL, and walking distance in 20 patients with chronic hepatitis C about to begin interferon alpha and ribavirin treatment. Alpha reliabilities for both the Schwartz Cancer Fatigue Scale and Hepatitis Quality of Life Questionnaire were moderately high. Power analyses of all outcome measures indicated a small effect size and sample size estimate of 30-40 per group to achieve power of N.80.

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Validity of accelerometry for the assessment of moderate intensity physical activity in the field

Cited by 624 publications

References 18 publications

Significant changes in physical activity among pregnant women in the UK as assessed by accelerometry and self-reported activity

Significant changes in physical activity among pregnant women in the UK as assessed by accelerometry and self-reported activity

Concurrent validity of a modified version of the International Physical Activity Questionnaire (IPAQ-A) in European adolescents: The HELENA Study

An intervention to prevent symptoms associated with hepatitis C: a pilot study

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