Progress has been made in developing and using accelerometer-based motion sensors for physical activity research. However, traditional methods of processing activity monitor data do not provide sufficient accuracy to satisfy current trends in the use of objective physical activity data in the research arena.
The aims of this proposal address this weakness in accelerometer- based PA assessment methodologies:
The specific aims are: 1) To develop and validate novel methods to process Actigraph accelerometer data to improve estimates of PA using powerful modern classification methods (classification trees, discriminant analyses, hidden Markov models, neural networks, regression splines, and support vector machines); 2) To compare these classification methods and traditional approaches for assessing PA in a controlled setting; 3) To compare the classification methods and traditional approaches for quantifying PA in free living PA conditions and to select a recommended method; and 4) To correct for measurement error in summary estimates of habitual PA from the novel classification methods and traditional approaches for quantifying PA. Our uniquely qualified multidisciplinary research group will address these aims by first developing innovative classification methods to identify specific activities in a laboratory setting, and then validating the models using data collected from known activities performed in both controlled laboratory environments and free- living situations. Based on the results of these studies, the classification methods will be refined, and estimates of PA behavior will be adjusted using statistical measurement error methods to derive more accurate estimates of PA. We have chosen the classification methods to include publicly available """"""""off-the shelf"""""""" classification methods that others can easily use. The resulting data processing programs will be implemented in popular commercial software packages and made freely available. The results of the proposed investigations will move the field of PA assessment forward by providing innovative approaches to derive more accurate and detailed estimates of PA using a popular accelerometer-based PA monitor. This systematic approach will provide information leading to a clearer understanding of the dose-response relationship between PA and health and the physiological basis of this relationship. ? ? ?

Agency
National Institute of Health (NIH)
Institute
National Cancer Institute (NCI)
Type
Research Project (R01)
Project #
1R01CA121005-01A1
Application #
7148449
Study Section
Special Emphasis Panel (ZRG1-HOP-D (50))
Program Officer
Berrigan, David
Project Start
2006-07-20
Project End
2011-05-30
Budget Start
2006-07-20
Budget End
2007-05-30
Support Year
1
Fiscal Year
2006
Total Cost
$253,303
Indirect Cost
Name
University of Massachusetts Amherst
Department
Other Health Professions
Type
Schools of Public Health
DUNS #
153926712
City
Amherst
State
MA
Country
United States
Zip Code
01003
Lyden, Kate; Keadle, Sarah Kozey; Staudenmayer, John et al. (2017) The activPALTM Accurately Classifies Activity Intensity Categories in Healthy Adults. Med Sci Sports Exerc 49:1022-1028
Lyden, Kate; Keadle, Sarah Kozey; Staudenmayer, John et al. (2016) The activPAL TM Accurately Classifies Activity Intensity Categories in Healthy Adults. Med Sci Sports Exerc :
Sasaki, Jeffer Eidi; Hickey, Amanda M; Staudenmayer, John W et al. (2016) Performance of Activity Classification Algorithms in Free-Living Older Adults. Med Sci Sports Exerc 48:941-50
Li, Haocheng; Kozey Keadle, Sarah; Staudenmayer, John et al. (2015) Methods to assess an exercise intervention trial based on 3-level functional data. Biostatistics 16:754-71
Staudenmayer, John; He, Shai; Hickey, Amanda et al. (2015) Methods to estimate aspects of physical activity and sedentary behavior from high-frequency wrist accelerometer measurements. J Appl Physiol (1985) 119:396-403
Li, Haocheng; Staudenmayer, John; Carroll, Raymond J (2014) Hierarchical functional data with mixed continuous and binary measurements. Biometrics 70:802-11
Lyden, Kate; Keadle, Sarah Kozey; Staudenmayer, John et al. (2014) A method to estimate free-living active and sedentary behavior from an accelerometer. Med Sci Sports Exerc 46:386-97
Welch, Whitney A; Bassett, David R; Thompson, Dixie L et al. (2013) Classification accuracy of the wrist-worn gravity estimator of normal everyday activity accelerometer. Med Sci Sports Exerc 45:2012-9
Lyden, Kate; Keadle, Sarah Kozey; Staudenmayer, John et al. (2013) Energy cost of common activities in children and adolescents. J Phys Act Health 10:62-9
Shiroma, Eric J; Freedson, Patty S; Trost, Stewart G et al. (2013) Patterns of accelerometer-assessed sedentary behavior in older women. JAMA 310:2562-3

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