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"It's like shooting at a CD from the halfway line of a football pitch," she explains.
"I love it because it's very ordered - there's a routine to it. You just repeat each shot. It's quite simple - the hard part is being consistent.
"Anybody can do sport, it's just finding the sport that suits you."
Find out about getting into archery with our special guide.
Jo Frith was looking for a hobby for when she was not doing her swimming training - but soon found she was "a much better archer than swimmer".