Elite women cite training limits in London Marathon buildup
In this image issued by London Marathon Events, Kenya's Eliud Kipchoge registers at the official hotel and biosecure bubble in London, Monday Sept. 28, 2020, ahead of the elite-only 2020 London Marathon on Sunday Oct. 4. The 40th Race will take place on a closed-loop circuit around St James's Park in central London. (Bob Martin/London Marathon Events via AP)

In this image issued by London Marathon Events, Kenya's Eliud Kipchoge registers at the official hotel and biosecure bubble in London, Monday Sept. 28, 2020, ahead of the elite-only 2020 London Marathon on Sunday Oct. 4. The 40th Race will take place on a closed-loop circuit around St James's Park in central London. (Bob Martin/London Marathon Events via AP)

Sep. 28, 2020 02:26 PM EDT
In this image issued by London Marathon Events, Kenya's Edith Chelimo, right, trains in the grounds of the official hotel and biosecure bubble in London, Monday Sept. 28, 2020, ahead of the elite-only 2020 London Marathon on Sunday Oct. 4. The 40th Race will take place on a closed-loop circuit around St James's Park in central London. (Bob Martin/London Marathon Events via AP)

In this image issued by London Marathon Events, Kenya's Edith Chelimo, right, trains in the grounds of the official hotel and biosecure bubble in London, Monday Sept. 28, 2020, ahead of the elite-only 2020 London Marathon on Sunday Oct. 4. The 40th Race will take place on a closed-loop circuit around St James's Park in central London. (Bob Martin/London Marathon Events via AP)

Sep. 28, 2020 02:26 PM EDT