[1][2] She edged out her teammate Jung Seul-Ki to take a bronze medal by 0.31 of a second in the 200 m breaststroke at the 2010 Asian Games in Guangzhou, China, with a time of 1:10.22.

[3] Back is also a member of Kang-won-do Cheong swimming club in Seoul.

[5][6] Back shared the seventh fastest qualifying time of 2:25.76 with China's Ji Liping in the morning's preliminary heats to secure a spot for the semifinals.

[7][8] In the evening session, Back missed out the final; the top eight fastest swimmers in the semifinals qualified and she was the ninth fastest swimmer; 0.21 of a second behind the eighth-fastest qualifier, lowering her Olympic time to 2:24.67.

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