She encapsulates the term "Gold Rush" like few track stars can in the past few years. Natalia Kaczmarek has been an integral part of Team Poland's success on the track, having helped the 4 x 400 women ...
UK Athletics performance director Paula Dunn admitted it was "time to reset" after Great Britain failed to win a gold medal at a World Athletics Championships for the first time since 2003.
BBC Sport's Ask Me Anything team looks at whether the World Athletics Championships are a good barometer for future Olympic success.
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