Davidson was a force in the London Marathon women's wheelchair race during the mid-1980s.

[1] She competed in both athletics and swimming at the 1984 Summer Paralympics, taking a gold medal in the shot put A1, silver in discus A1, bronze in javelin A1, and another bronze in the pool in the 200 metre individual medley A1.

[2] Karen was a member of Rugby Sport for the Disabled Association.

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