HealthWorks: Results of a multi-component group-randomized worksite environmental intervention trial for weight gain prevention

Jennifer A Linde, Katherine E. Nygaard, Richard F Maclehose, Nathan Mitchell, Lisa J Harnack, Julie M. Cousins, Daniel J. Graham, Robert W Jeffery

Research output: Contribution to journalArticlepeer-review

50 Scopus citations


Background: U.S. adults are at unprecedented risk of becoming overweight or obese, and most scientists believe the primary cause is an obesogenic environment. Worksites provide an opportunity to shape the environments of adults to reduce obesity risk. The goal of this group-randomized trial was to implement a four-component environmental intervention at the worksite level to positively influence weight gain among employees over a two-year period. Environmental components focused on food availability and price, physical activity promotion, scale access, and media enhancements.Methods: Six worksites in a U.S. metropolitan area were recruited and randomized in pairs at the worksite level to either a two-year intervention or a no-contact control. Evaluations at baseline and two years included: 1) measured height and weight; 2) online surveys of individual dietary intake and physical activity behaviors; and 3) detailed worksite environment assessment.Results: Mean participant age was 42.9 years (range 18-75), 62.6% were women, 68.5% were married or cohabiting, 88.6% were white, 2.1% Hispanic. Mean baseline BMI was 28.5 kg/m 2 (range 16.9-61.2 kg/m 2). A majority of intervention components were successfully implemented. However, there were no differences between sites in the key outcome of weight change over the two-year study period (p = .36).Conclusions: Body mass was not significantly affected by environmental changes implemented for the trial. Results raise questions about whether environmental change at worksites is sufficient for population weight gain prevention.Trial Registration: NCT00708461.

Original languageEnglish (US)
Article number14
JournalInternational Journal of Behavioral Nutrition and Physical Activity
StatePublished - Feb 16 2012

Bibliographical note

Funding Information:
This study was funded by National Institutes of Health Grant 1R01 DK067362 (RWJ, PI). The funding body had no role in design, data collection, analysis, interpretation, manuscript writing, or in the decision to submit the manuscript for publication.


  • Adults
  • Environment
  • Obesity
  • Weight gain prevention
  • Worksites


Dive into the research topics of 'HealthWorks: Results of a multi-component group-randomized worksite environmental intervention trial for weight gain prevention'. Together they form a unique fingerprint.

Cite this