G
Gregory J. Welk
Researcher at Iowa State University
Publications - 304
Citations - 17788
Gregory J. Welk is an academic researcher from Iowa State University. The author has contributed to research in topics: Physical fitness & Body mass index. The author has an hindex of 64, co-authored 285 publications receiving 16286 citations. Previous affiliations of Gregory J. Welk include Nationwide Children's Hospital & Mathematica Policy Research.
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The Youth Physical Activity Promotion Model: A Conceptual Bridge Between Theory and Practice
TL;DR: In this article, a conceptual model of physical activity promotion that is based on the unique developmental, psycho-1ogical, and behavioral characteristics of children is proposed, which adopts a social-ecological framework by acknowledging the input of various personal, social and environmental influences on children's physical activity.
Journal Article
Reliability of accelerometry-based activity monitors: a generalizability study.
TL;DR: The CSA/MTI appeared to have acceptable reliability for most research applications and values with the other devices indicate some possible concerns with reliability, but additional work is needed to better understand factors contributing to variability in accelerometry data.
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Accuracy of Armband Monitors for Measuring Daily Energy Expenditure in Healthy Adults
Darcy L. Johannsen,Miguel A. Calabro,Jeanne M. Stewart,Warren D. Franke,Jennifer Rood,Gregory J. Welk +5 more
TL;DR: The SenseWear Pro3 and the SenseW wear Mini armbands show promise for accurately measuring daily energy expenditure under free-living conditions, however, more work is needed to improve the ability of these monitors to accurately measure energy expenditure at higher levels of expenditure.
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Validity of Consumer-Based Physical Activity Monitors
TL;DR: The indicators of the agreement clearly favored the BodyMedia FIT armband, but promising preliminary findings were also observed with the Fitbit Zip.
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A comparative evaluation of three accelerometry-based physical activity monitors.
TL;DR: Evaluating the absolute and relative validity of three contemporary activity monitors under both laboratory and field conditions found the CSA yielded accurate predictions of energy expenditure (EE), whereas the Tritrac and Biotrainer tended to overestimate the EE (101-136% of measured value).