Swimming: Russia's Yuliya Efimova breaks world 50m breaststroke record in 29.78s

Russia's Yuliya Efimova celebrates after setting a new world record in the women's 50m breaststroke heats during the World Swimming Championships at the Sant Jordi arena in Barcelona on Saturday, Aug 3, 2013. Efimova broke the women's 50m breaststrok
Russia's Yuliya Efimova celebrates after setting a new world record in the women's 50m breaststroke heats during the World Swimming Championships at the Sant Jordi arena in Barcelona on Saturday, Aug 3, 2013. Efimova broke the women's 50m breaststroke world record on Saturday morning, the fourth record to fall at these world swimming championships in Barcelona. -- PHOTO: REUTERS

BARCELONA (AFP) - Russia's Yuliya Efimova broke the women's 50m breaststroke world record on Saturday morning, the fourth record to fall at these world swimming championships in Barcelona.

Having won the world 200m breaststroke title on Friday night, the 21-year-old Efimova clocked 29.78secs in the morning's 50m heats at Barcelona's Palau Sant Jordi pool, shaving just two hundredths of a second off the four-year-old record set by Jessica Hardy of the USA.