unorth has it right in the last sentence: nurses are accustomed to making physical contact with people and moving them around, so they would be less intimidated to getting involved in an activity like wrestling. When Barb's Combative Women's Wrestling site was THE place for fvf lovers, it became very apparent that the majority of women, by far, who wrestled recreationally were, in fact, nurses. The reason given was the one cited in the post above. Obviously, there's a lot of truth to it.