The women are getting it done at the world swimming championships . I turned and I saw his foot and I was like, ‘Right, I’ve got some catching up to do now' Adam Peaty Sarah Sjostrom of Sweden lowered her own world record in the 100-meter butterfly to win gold Monday night, after first breaking the mark set by American Dana Vollmer at the 2012 London Olympics in the semi-finals on Sunday. Earlier Monday, American teenager Katie Ledecky bettered her own world record in the 1,500 freestyle preliminaries. Three world records set in the first two days of pool swimming – and all by women. Sjostrom led at the turn and won by a body length, touching in 55.64 seconds. She dipped a hundredth of a second lower than her mark a day earlier while finishing 1.41 seconds ahead of Jeanette Ottesen of Denmark. Ottesen earned silver in 57.05 and Lu Ying of China took bronze in 57.48. Adam Peaty gave Britain its first gold medal in the temporary pool at Kazan Arena with a comeback victory in the 100 breaststroke. Former world record holder and current Olympic champion Cameron van der Burgh of South Africa led at the turn under Peaty’s pace set in April. But Peaty overtook van der Burgh in the closing meter, getting his hand on the wall in 58.52 for the gold. Van der Burgh was second in 58.59. Peaty’s teammate, Ross Murdoch, took third in 59.09. “I turned and I saw his foot and I was like, ‘Right, I’ve got some catching up to do now”‘ Peaty said. “About 25 meters out he was still in front so I was a bit sceptical. But I remembered what I trained for is moments like this and I came out on top thankfully.” Van der Burgh’s strategy was to go out fast and try to make Peaty catch him. A pile of bricks came down on me in the last five meters Cameron van der Burgh “It was hard. A pile of bricks came down on me in the last five meters,” Van der Burgh said. “We knew it was going to be a close race. Credit to him, he finished strong, and that’s the way he won the race.” Peaty broke van der Burgh’s 2012 world mark earlier this year to become the first man in history under 58 seconds in the event.“There’s only one more tick box and hopefully I’m ready for that next year,” said Peaty, who is aiming for his first Olympics next summer in Rio de Janeiro. Elsewhere, Hungary’s ’Iron Lady’ Katinka Hosszu broke the women’s 200m IM record on Monday as she retained her crown in Kazan. Hosszu clocked two mins, 06.12 seconds to take 0.03 seconds off Ariana Kukors’ previous record from the 2009 world championships in Rome in the era of neoprene suits. Japan’s Kanako Watanabe took silver at 2.33 seconds back with Britain’s Siobhan Marie O’Connor claiming bronze at 2.65. And France’s Florent Manaudou won the men’s 50m butterfly title to claim his second gold in Russia. Manaudou, the Olympic 50m freestyle champion, touched the wall at 22.97 seconds with Nicholas Santos of Brazil winning silver 0.12 secondss back with Hungary’s Laszlo Cseh taking bronze a further 0.18 seconds behind. I’m really happy with the win ... but I didn’t swim as fast as I wanted Florent Manaudou The 24-year-old younger brother of Laure Manaudou, the 2004 Olympic 400m freestyle champion, said he is now focused on the 50m freestyle heats, which start on Friday with Brazil’s Cesar Cielo is the reigning champion. The Frenchman is hoping to win a third worlds gold in Kazan having been part of France’s 4x100m freeestyle squad on Sunday which retained their world title. “I’m really happy with the win, it’s a good start after yesterday and now another gold today, but I didn’t swim as fast as I wanted,” admitted Manaudou.