This investigation studied the physiological profiles of eight highly trained female dance majors. To be considered highly trained, each subject had to be dancing a minimum of three hours a day, four to five days a week, for the last year. They also had to meet the criterion of dancing at least ten hours a week for the last five years prior to that year. Measurements included body composition, pulmonary function, echocardiographic analysis, and aerobic capacity. Descriptive data (age, height, weight, resting heart rate, blood pressure), pulmonary function, echocardiographic data, anthropometric data, and maximum aerobic capacity are presented in tabular form. Other test results and data are also discussed. It is concluded that dancers are subjected daily to vigorous training which taxes the cardiovascular-pulmonary system. Ballet dancers must withstand considerable work loads. In rating several sports in strength, endurance, body type, flexibility, coordination, speed, agility, balance, intelligence, and creativity, ballet received the highest rating compared with football, basketball, hockey, boxing, and baseball. (JD)