London will reportedly be Radcliffe's final marathon of her career.
Many women report making strength and speed gains after giving birth.
He is the man to beat in Moscow.
Mo Farah continues to lead the charge.
A list of the top 100 track & field athletes using the social media service Twitter.
The running community applauds these efforts.
British runner comments about running half of the London Marathon this weekend.
Her record-setting time came 10 years ago this month.
A persistent foot injury has sidelined her since 2012.