This learner resource, dated November 2021, details the SISFFIT040 unit of competency: developing and instructing gym-based exercise programs. It guides instructors through client needs identification, program development (incorporating principles like adaptation and overload), initial instruction and equipment demonstration, ongoing client support, and program evaluation. Copyright and disclaimer information are included, along with learning activities and assessments. The resource also explores factors influencing program design such as client age, sex, and medical history. Finally, it provides references to relevant external resources.