07/30/2011 07:59 EDT | Updated 09/29/2011 05:12 EDT

Rebecca Adlington wins women's 800 freestyle at swimming world championships

SHANGHAI - Olympic champion and world record holder Rebecca Adlington of Britain took the lead for good on the final lap and won the women's 800-meter freestyle at the world swimming championships.

She and defending champion Lotte Friis of Denmark, winner of the 1,500-meter race, fought a race-long duel, with the lead changing hands several times over the last 400 metres.

Adlington was behind by about a half-second at the 750-mark, but powered home to finish in 8 minutes, 17.51 seconds.

Friis took the silver in 8:18.20 and Kate Ziegler of the United States earned the bronze in 8:23.36.