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Updated: Oct 3, 2026

Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity
Published on: March 7, 2019
The Centers for Disease Control and Prevention Director's Physical Activity Challenge: an evaluation of a worksite
S L Hammond1, B Leonard, F Fridinger
1Westat Atlanta, GA 30341, USA.
Abstract:
In 1996, the Centers for Disease Control and Prevention launched a 50-day exercise campaign called the "Director's Physical Activity Challenge" to stimulate its employees to exercise. Of the 5822 eligible employees, 3740 (64%) joined, but pre- and post-data was available on only 1192 (20.5%) people. Of this group, 86% of those in contemplation and 64% of those in preparation, and 34% of those in action advanced to a higher stage.
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