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Gold medalist Nathan Cohen retires from rowing

AP - Sports

WELLINGTON, New Zealand (AP) -- Olympic champion rower Nathan Cohen has retired after being diagnosed with a serious heart ailment.

Cohen teamed with Joseph Sullivan to win the double sculls at the London Olympics after they had twice combined to win world championships.

But Cohen was diagnosed before this year's world championships, in August, with supraventricular tachycardia, an illness which effects heart rhythm.

He said he began to lose power during races until ''it feels like you're dragging something behind the boat.''

He missed the world championships and was dropped from New Zealand elite squad.

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