Ballet is very hard on the dancer's joints. The dance floor is the dance equivalent of a pair of running shoes. A combination of an excellent floor and a good technique will help to minimize joint stress and lengthen the dancer's overall career. Dancers should not dance on hard surfaces such as concrete and should always land with a plie to help minimize impact on the joints. An ideal dance floor is sprung, which is any hard dance surface which is able to move and absorb impact. The floor is usually covered with a special dance surface that provides traction for the dancer to minimize slipping. Some studios keep their dance floors extremely clean and in good repair. Other studios clean the floor annually. Some studios never clean their floors.
When observing a class, watch where the foot impacts the floor when jumping to see if the floor gives slightly. The cleanliness of the floor covering can sometimes be seen easily. Sometimes the dancer's shoes will be extremely dirty on the bottom, indicating a dirty floor. The dance floor covering comes in strips that are taped together with special tape. Check to see if the tape is in good condition or peeling up. There should not be any ripples, bulges, or other bumps/dips in the dance surface. These things can present a hazard to the dancer and may lead to injury.