Most fire fighters have come across the term “mobility” being used as a reference to an individuals ability to move; whether freely, or in a restricted way. This is a good starting point, however mobility can be better defined conceptually and practically for the fire fighter, and this is what we aimed to achieve in this episode. Along with defining important terms under the umbrella of mobility such as passive mobility, active mobility, and control, we discuss how movement can be impacted (positively or negatively) by someones mobility capacity. Our objective was to produce a comprehensive mobility primer for fire fighters, so they can appreciate WHY mobility is important within the large context of fire fighter health and wellness.