Identify true statements about the junior-to-senior transition (JST). (Check all that apply.) Multiple select question. Individual sport athletes enter the JST when they begin to compete at a senior level. It is considered a decisive transition for athletes who aim to remain amateur athletes rather than play at the elite level. It is a normative transition between the development and mastery career stages. The entry point to JST for team sport athletes is their first good performance before being selected for a senior team