Grounded in self-determination theory, this study examines the effects of a leisure-time physical activity (LTPA) intervention with work colleagues on work-related outcomes of relatedness satisfaction, engagement factors, satisfaction, and burnout subtypes. Fifty-seven teachers (M[subscript age] = 46.81 ± 7.90), from two secondary schools randomized as an experimental (n = 22) or control (n = 35) group, participated in the study. Thirty-two sessions based on playful, strength, aerobic, and back pain prevention activities were performed two days per week throughout one academic year. The experimental group teachers reported significant improvements in relatedness satisfaction, vigor, absorption, and satisfaction at work compared to the control group teachers and their own baseline scores. Results highlight that two weekly sessions of LTPA with work colleagues can lead to positive work-related outcomes among teachers.