In olympic volleyball?

Question

what are those things they wear on their shoulders?

Answer 1

It is a special sports tape to provide increased circulation and reduced inflammation to the applied area.  Generally, like with Kerri Walsh, the athletes wear it if they are recovering from an injury or surgery.

Answer 2

thats because they had surgery on their shoulder

Answer 3

What are you talking about?  Who is wearing this and what does it look like?  US beach volleyballer Kerri Walsh has a bandage on her right shoulder because she is recovering from surgery, is that what you are talking about?  What is on Ms Walsh’s shoulder may be black kinesio tape. It is a tape that gives an injured or repaired joint some support. It is touted as promoting circulation: