This document specifies requirements for the supervision and staffing, necessary to protect the health, safety and welfare of users, staff and contractors across a wide range of fitness centres as specified in EN 17229:2019. This document specifies the essential skills required from operational staff and fitness staff who have a responsibility for the supervision of their users, staff and contractors using and working in their fitness centres. This document applies in conjunction with, and in addition to EN 17229:2019. This document cannot be used separately from EN 17229:2019. NOTE National occupational health and safety rules and regulations are not affected by this document.