Objectives: Workplace productivity has always been affected by a high-stress level and lack of sports activities. This aspect requires the researchers' emphasis and the present research performs this role by examining the much neglected impact of sports activities, stress management, and work-life balance on workplace productivity of manufacturing firms in Vietnam. The study also investigated the mediating impact of stress management and work-life balance among sports activities and workplace productivity of manufacturing firms in Vietnam. Methods: The primary data was collected through survey questionnaires from the employees of manufacturing companies in Vietnam. The research also applied the PLS-SEM using Smart-PLS to check the reliability and association among variables. Results: The outcomes indicated that sports activities, stress management, and work-life balance have a positive linkage with the workplace productivity of manufacturing firms in Vietnam. The outcomes also revealed that stress management and work-life balance significantly mediate among sports activities and workplace productivity of manufacturing firms in Vietnam. Conclusion: This research guides the policymakers in making policies related to workplace productivity improvement using sports activities, work-life balance, and stress management.