By A Mystery Man Writer
Femke Bol won in 49.17 seconds and took 0.07 off the record she set two weeks ago at the Dutch championships.
Femke Bol reacts to 400m world record at the World Athletics
Olympics-Athletics-Triumvirate keep 400m women's hurdles showdown
Femke Bol breaks her own world indoor 400m record - Canadian
Femke Bol shatters her own 400m world record at Dutch Indoor
World Indoor Athletics - Day 1 morning session including women's
Bol clocks fastest ever indoor 500m at Boston GP
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Femke Bol breaks 41-year-old world women's indoor 400m record at
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Femke Bol Lowers Own 400m World Record To 49.17 At World Indoor
Bol athletics Euros queen with third gold, Duplantis rules pole vault
Femke Bol breaks her own 400m world record at indoor worlds