Health ambassadors in the workplace: a health promotion intervention mobilizing middle managers and RE-AIM evaluation of outcomes

BACKGROUND: The workplace provides an ideal setting for health promotion, as adults spend most of their day at work. Middle managers hold a strategic position to lead workplace health promotion. This study evaluates the outcomes of an intensive intervention training middle managers to promote health in the workplace. METHODS: A workshop was designed and conducted to train female middle management employees to construct, implement, and evaluate a health promotion program in their workplace. Semi-structured interviews were carried out post-intervention to assess workplace health promotion outcomes according to the RE-AIM framework, and identify variables contributing to success. Additionally, questionnaires were distributed pre and post-program assessing personal health and self-efficacy changes. RESULTS: Eighteen participants from 13 government offices, who serve 19,560 employees, completed the training course. Nine workplaces had workplace health promotion programs in progress 12 months after the course had ended, of which 8 made health promotion changes in organizational policy. Workplace RE-AIM scores showed that 8 workplaces were high or partial performers, and 5 were low or non-performers. Factors that increased the likelihood of successful interventions included management support, steering committee, comprehensive programming, conducting a needs assessment and flexibility in program implementation in the presence of challenges. Post course, participants reported increased health knowledge related to workplace health promotion (p < 0.001), and increased health promotion self-efficacy (p < 0.05). CONCLUSIONS: Training and continued guidance of middle managers resulted in the design and successful implementation of workplace health promotion interventions. A RE-AIM based assessment was found to be an effective method for evaluating multi-content workplace health promotion programs. Registered at ClinicalTrials.gov, https://www.clinicaltrials.gov, registration number: NCT03295136, registration date: 24/09/2017. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12889-021-11609-8.