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Author ORCID Identifier



Open Access Dissertation

Document Type


Degree Name

Doctor of Philosophy (PhD)

Degree Program


Year Degree Awarded


Month Degree Awarded


First Advisor

Sofiya Alhassan

Second Advisor

Patty Freedson

Third Advisor

Lisa Chasan-Taber

Subject Categories

Community Health and Preventive Medicine | Kinesiology | Public Health


PURPOSE: To examine the feasibility and efficacy of a three-month, cluster-randomized workplace PA intervention on PA levels and wellbeing measures in preschool classroom teachers. METHODS: Ten preschool centers were randomized into two groups; short-bouts of structured PA (SBS-PA, n=5) or traditional unstructured PA (TRAD-PA, n=5). The SBS-PA intervention consisted of 10-minute structured, teacher-led PA routines implemented within the classroom setting, followed by 20 minutes of unstructured playtime. The TRAD-PA intervention consisted of supervised 30-minute of unstructured free playtime. Both interventions were implemented during the morning and afternoon designated gross-motor playtime for 30 min/session, five days/week for three months. Participants’ PA levels were assessed for five consecutive days using accelerometers. Outcome measures were between group differences in during-preschool PA, general health status, perceived stress, depression status, exercise

self-efficacy and exercise outcome expectations. All measures were assessed at baseline and at 3-months. A multivariate analysis of covariance with repeated measures was used to assess the effect of the intervention on classroom teachers’ PA levels (primary outcome). An analysis of covariance was used to assess effect of the intervention on all remaining variables (secondary outcomes). Intervention fidelity and process evaluations were assessed two days/week using a semi-structured questionnaire. RESULTS: A total of 43 (SB-PA, n=19; TRAD-PA, n=24) classroom teachers participated in the program (mean±SD; age=35.0±6.0; BMI= 30.0±7.6kg/m2). No significant group by time interaction effects were observed in any of the PA variables. The SBS-PA group exhibited a slight decrease in the percent of time spent in sedentary behavior (baseline, 52.9±12.2; post, 51.2±10.5) and increased their percent time spent in light PA (baseline, 45.2±12.5; post, 47.3±10.1). No significant differences were observed in any of the secondary outcome measures. SBS-PA teachers implemented the protocol as intended only 67.2% of the time. Only 56.6% of SBS-PA and 75.2% of TRAD-PA interventions lasted 30 minutes as instructed. CONCLUSION: In this sample of preschool teachers, it does not appear that a short-bouts PA workplace intervention has an impact on teachers’ PA levels or well-being measures.. Strategies to improve protocol adherence should be examined in future workplace PA studies implemented in preschool settings.