The ancient Greek philosopher Heraclitus famously asserted "Life is flux." Dancers most certainly know this to be true. Whether they are early in their training or seasoned professionals, change is your students' persistent companion. Dancers must nimbly adjust to shifting expectations, choreography and opportunities, as well as to transformation within their very own bodies, the instrument of their art. Physical change occurs, for example, as young dancers come into physical maturity and as adult dancers meet the natural process of aging. Dancers of any age may face change in their bodies due to injury.