Evaluation of a Worksite-Based Small Group Team Challenge to Increase Physical Activity.

Purpose: To investigate whether participants in a small group team challenge had greater completion rates in an institution-wide step-challenge than other participants.

Design: A quasi-experimental, posttest-only design with a comparison group was used to evaluate group differences in completion rates.

Setting: A large university system provided the opportunity to participate in a physical activity challenge.

Participants: The study was limited to employees who participated in the physical activity challenge.

Intervention: Two institutions offered participants the chance to compete as smaller groups of teams within their institution. These team-challenge participants (N = 414) were compared to participants from the same institutions that did not sign up for a team and tracked their steps individually (N = 1454).

Measures: Participants who reported 50 000 steps per week for 5 of the 6 weeks were classified as challenge completers. We also evaluated total step count and controlled for several potential covariates including age, gender, and body mass index.

Analysis: Logistic regression was used to model the dichotomous outcome of challenge completion.

Results: Team-challenge participants were more likely to complete the physical activity challenge than other participants. Team-challenge participants had 1922 more steps per day than individual participants. However, at an institution level, overall completion rates were not higher at institutions that offered a team challenge.