This article provides a list of academic papers that explore the link between employee wellbeing , wellbeing programs on performance and productivity. Most if not all these papers can be accessed via google scholar.

1. “The relationship between employee wellness programs and workplace productivity” by R. M. Goetzel et al. (2010). This study examines the impact of employee wellness programs on workplace productivity, finding that companies with such programs have higher levels of productivity than those without.
2. “The relationship between employee wellness, productivity, and long-term healthcare costs” by R. Loeppke et al. (2015). This paper explores the impact of employee wellness on both short-term productivity and long-term healthcare costs, finding that companies with effective wellness programs see a reduction in healthcare costs over time.
3. “A review of the relationship between employee wellness and business outcomes” by K. R. Murphy and D. R. Costello (2016). This paper provides a comprehensive review of the literature on the relationship between employee wellness and business outcomes, including factors such as productivity, absenteeism, and turnover.
4. “Employee wellness and job satisfaction: An empirical study” by Y. K. Kim and K. J. Cho (2016). This study examines the relationship between employee wellness and job satisfaction, finding that employees who participate in wellness programs have higher levels of job satisfaction than those who do not.

5. “Employee Wellbeing, Productivity, and Firm Performance” by Christian Krekel, George Ward & Jan-Emmanuel De Nev(2019). This study concludes that there is a strong positive correlation between employees’ satisfaction with their company and employee productivity and customer loyalty, and a strong negative correlation with staff turnover. Ultimately, higher wellbeing at work is positively correlated with more business-unit level profitability
6. “Wellbeing in work environments” by E. Pagán-Castaño, A. Maseda-Moreno, C. Santos-Rojo(2019). Recent studies have shown the positive effect of some human resource practices on employees’ health and performance at work. In this context, it is necessary to determine the relationship between human resource management, employee performance, and wellbeing at work. This paper helps to understand the factors that better describe and influence employee wellbeing, which also contributes to improving their performance at work, considering their multidimensional nature
7. “The Interplay of Socioecological Determinants of Work–Life Balance, Subjective Wellbeing and Employee Wellbeing” by Ka Po Wong, Fion Choi Hung Lee,Pei-Lee Tehand Alan Hoi Shou Chan(2021). This paper explores the socioecological factors that influence work–life balance (WLB) and how they operate by examining the relationships between WLB, subjective wellbeing, employee wellbeing and quality time allocation. The results show that an individual’s personal feelings, behaviours and health influenced how they perceived WLB. The study also found that WLB positively correlated with employee wellbeing and quality and quantity of personal life-time. How people felt about their wellbeing despite being subjective has a significant impact on their perception of WLB and its outcomes. 
8. Flourishing in the Workplace: A One-Year Prospective Study on the Effects of Perceived Organizational Support and Psychological Capital”, by Henry C. Y. Ho and Ying Chuen Chan(2022). The study identifies the organizational and personal resources that contribute to employee flourishing. It concludes that perceived organizational support (POS) is a significant contributor personal resources and employee wellbeing. Employees who perceived that the organization values their contribution, cares about their well-being, and commits to provide support were more likely to experience flourishing in the long run. They were more likely to feel contentment and joy, establish and maintain positive relationships with others, have a sense of purpose and meaning in life, and work towards or achieve goals that they have set for themselves
9. Workplace isolation, loneliness and wellbeing at work: The mediating role of task interdependence and supportive behaviours”, by Teresa C. D’Oliveira & Liana Persico(2023). This study explores the relationship between task interdependence and supportive behaviours of colleagues on workplace isolation and wellbeing. It concludes that supportive behaviours had a mediating role, task interdependence did not mediate the relationships between company isolation and loneliness, and wellbeing. The findings show that greater task interdependence is not enough to reverse the negative effects of workplace isolation on wellbeing. It concludes investing in a supportive environment may reverse the negative effects of workplace isolation on wellbeing, highlighting the importance of a supportive culture.

There are many more studies out there that examine this topic from different angles and provide valuable insights into the importance of promoting employee wellness as a means of achieving business success and  I will be sharing those with you in the near future.