A major challenge in public health research on physical activity is in reconciling the commonly observed differences between estimates provided by monitor-based methods and report-based methods. Calibration methods are widely used in measurement research to rescale or convert an estimate so that it matches a more robust criterion value. Accelerometry-based activity monitors are routinely calibrated against more robust estimates of indirect calorimetry, but surprisingly little research is done to calibrate report-based estimates. The purpose of the paper was to document the utility of calibration methods for harmonizing estimates from report-based measures to correspond with data from monitor-based methods. While there are also limitations associated with monitor-based methods, this procedure provides a systematic way to promote harmonization of estimates obtained from these different methods. This enables the more feasible report-based measures to provide more accurate group-level estimates of physical activity for different research applications.
Gregory J. Welk and Duane Knudson
Bradley J. Cardinal, Minsoo Kang, James L. Farnsworth II and Gregory J. Welk
Kinesiology leaders were surveyed regarding their views of the (re)emergence of physical activity and public health. Their views were captured via a 25-item, online survey conducted in 2014. The survey focused on four areas: (a) types of affiliation with public health; (b) program options and course coverage; (c) outreach programming; and (d) perspectives on integration. Member and nonmember institutions of the American Kinesiology Association received the survey. Responses were received from 139 institutional leaders, resulting in an overall response rate of 21.4%. Key findings included that the combination of physical activity and public health was seen as both a stand-alone subdisciplinary area within kinesiology and also an area that has a great deal of potential for collaboration, the acquisition of external funding, and further strengthening of community outreach and engagement. The survey results are placed in historical context and interpreted with various caveats and limitations in mind.