The serous bursa are those structures placed in contiguity with the tendinous insertions, appointed to the protection of the movable parts that during the movement are subjected to intense frictions.
They are structures used to ease the movement between adjacent stratums of the body. Their structure is constituted of a sort of external bursa which contains a more or less virtual quantity of synovial fluid.
Bursitis:with this term we define the inflammatory processes that concern the serous bursas. They can sometimes be caused by direct or indirect traumas, but generallythese pathologies find their origin in the movements repeated in an extreme way during the sports activity. These movements cause an excessive friction of the specific structures. Some body areas are more involved, as the pre-patellar, the olecranic and the over and back calcaneal.