In brief:During an 18-month period 61 patients who had problems associated with aerobic dance were evaluated. Fifty-four had overuse injuries, including all but two of the 24 patients who were instructors. The authors used three-phase radionuclide scintigraphy to evaluate some of the injuries and prescribed balanced orthoses for the management of pain related to lower extremity malalignment. Most of the injuries occurred when people began exercising vigorously after a period of inactivity.