Purpose: The purpose of the thesis was to investigate how a ten-week physical activity interventioncould affect the general well-being of employees from a sedentary office environment.Method: 16 employees participated in a ten-week intervention which implementedphysical activity in their workplace. To measure the participant’s well-being, three surveyswas distributed to all. One before, during, and after the intervention. Furthermore,were six interviews with individuals conducted after the intervention ended.Results: The employees created awareness of the importance of being physically active,and experienced changes in their physical and mental well-being.Conclusion: Well-being is an individual feeling, which is affected by external elementschanging a person’s needs.