U.S. Olympic marathoner Molly Seidel trains with her coach Jon Green outside the stadium at Harvard University during the coronavirus disease (COVID-19) outbreak in Cambridge, Massachusetts, U.S., May 29, 2020. REUTERS/Brian Snyder

U.S. Olympic marathoner Molly Seidel changes her shoes while training during the coronavirus disease (COVID-19) outbreak in Cambridge, Massachusetts, U.S., May 29, 2020. REUTERS/Brian Snyder

U.S. Olympic marathoner Molly Seidel trains outside the stadium at Harvard University during the coronavirus disease (COVID-19) outbreak in Cambridge, Massachusetts, U.S., May 29, 2020. REUTERS/Brian Snyder

U.S. Olympic marathoner Molly Seidel trains outside the stadium at Harvard University during the coronavirus disease (COVID-19) outbreak in Cambridge, Massachusetts, U.S., May 29, 2020. REUTERS/Brian Snyder

U.S. Olympic marathoner Molly Seidel trains with runner Chris Battoo and her coach Jon Green (R) outside the stadium at Harvard University during the coronavirus disease (COVID-19) outbreak in Cambridge, Massachusetts, U.S., May 29, 2020. REUTERS/Brian Snyder

U.S. Olympic marathoner Molly Seidel trains with her sister Izzy and runner Chris Battoo outside the stadium at Harvard University during the coronavirus disease (COVID-19) outbreak in Cambridge, Massachusetts, U.S., May 29, 2020. REUTERS/Brian Snyder

U.S. Olympic marathoner Molly Seidel wipes her face while training outside the stadium at Harvard University during the coronavirus disease (COVID-19) outbreak in Cambridge, Massachusetts, U.S., May 29, 2020. REUTERS/Brian Snyder

U.S. Olympic marathoner Molly Seidel trains outside the stadium at Harvard University during the coronavirus disease (COVID-19) outbreak in Cambridge, Massachusetts, U.S., May 29, 2020. REUTERS/Brian Snyder

U.S. Olympic marathoner Molly Seidel trains outside the stadium at Harvard University during the coronavirus disease (COVID-19) outbreak in Cambridge, Massachusetts, U.S., May 29, 2020. REUTERS/Brian Snyder

U.S. Olympic marathoner Molly Seidel trains with her sister Izzy outside the stadium at Harvard University during the coronavirus disease (COVID-19) outbreak in Cambridge, Massachusetts, U.S., May 29, 2020. REUTERS/Brian Snyder

U.S. Olympic marathoner Molly Seidel trains with her sister Izzy and her coach Jon Green outside the stadium at Harvard University during the coronavirus disease (COVID-19) outbreak in Cambridge, Massachusetts, U.S., May 29, 2020. REUTERS/Brian Snyder

U.S. Olympic marathoner Molly Seidel stretches with her sister Izzy before a training session during the coronavirus disease (COVID-19) outbreak in Cambridge, Massachusetts, U.S., May 29, 2020. REUTERS/Brian Snyder

U.S. Olympic marathoner Molly Seidel stretches before a training session during the coronavirus disease (COVID-19) outbreak in Cambridge, Massachusetts, U.S., May 29, 2020. REUTERS/Brian Snyder

U.S. Olympic marathoner Molly Seidel stretches before a training session with her coach Jon Green and her sister Izzy during the coronavirus disease (COVID-19) outbreak in Cambridge, Massachusetts, U.S., May 29, 2020. REUTERS/Brian Snyder

U.S. Olympic marathoner Molly Seidel puts on a face covering before a training session during the coronavirus disease (COVID-19) outbreak in Cambridge, Massachusetts, U.S., May 29, 2020. REUTERS/Brian Snyder

A Marathon Oil well site is seen, as oil and gas activity dips in the Eagle Ford Shale oil field due to the coronavirus disease (COVID-19) pandemic and the drop in demand for oil globally, in Texas, U.S., May 18, 2020. Picture taken May 18, 2020. REUTERS/Jennifer Hiller

Team GB runner Alyson Dixon crosses Northern Spire Bridge as she competes in a virtual half marathon in Sunderland, following the outbreak of the coronavirus disease (COVID-19), Sunderland, Britain, May 9, 2020. REUTERS/Lee Smith

Team GB runner Alyson Dixon crosses Wearmouth Bridge as she competes in a virtual half marathon in Sunderland, following the outbreak of the coronavirus disease (COVID-19), Sunderland, Britain, May 9, 2020. REUTERS/Lee Smith

Team GB runner Alyson Dixon passes Souter Lighthouse as she competes in a virtual half marathon in Sunderland, following the outbreak of the coronavirus disease (COVID-19), Sunderland, Britain, May 9, 2020. REUTERS/Lee Smith

Team GB runner Alyson Dixon crosses Wearmouth Bridge as she competes in a virtual half marathon in Sunderland, following the outbreak of the coronavirus disease (COVID-19), Sunderland, Britain, May 9, 2020. REUTERS/Lee Smith

Team GB runner Alyson Dixon passes Fulwell Windmill as she competes in a virtual half marathon in Sunderland, following the outbreak of the coronavirus disease (COVID-19), Sunderland, Britain, May 9, 2020. REUTERS/Lee Smith

Mark Gammage rows a marathon to raise money for St Luke’s Hospice as part of ‘the 2.6 challenge’ in Wychwood Park, following the outbreak of the coronavirus disease (COVID-19), Crewe, Britain, April 26, 2020. REUTERS/Molly Darlington

Mark Gammage rows a marathon to raise money for St Luke’s Hospice as part of ‘the 2.6 challenge’ in Wychwood Park, following the outbreak of the coronavirus disease (COVID-19), Crewe, Britain, April 26, 2020. REUTERS/Molly Darlington

Mark Gammage rows a marathon to raise money for St Luke’s Hospice as part of ‘the 2.6 challenge’ in Wychwood Park, following the outbreak of the coronavirus disease (COVID-19), Crewe, Britain, April 26, 2020. REUTERS/Molly Darlington

Mark Gammage rows a marathon to raise money for St Luke’s Hospice as part of ‘the 2.6 challenge’ in Wychwood Park, following the outbreak of the coronavirus disease (COVID-19), Crewe, Britain, April 26, 2020. REUTERS/Molly Darlington

Mark Gammage rows a marathon to raise money for St Luke’s Hospice as part of ‘the 2.6 challenge’ in Wychwood Park, following the outbreak of the coronavirus disease (COVID-19), Crewe, Britain, April 26, 2020. REUTERS/Molly Darlington

Anna Bassil runs a marathon distance dressed as a cake around her garden in St Albans. The London Marathon was due to take place today but was postponed following the outbreak of the coronavirus disease (COVID-19), St Albans, Britain, April 26, 2020. REUTERS/Paul Childs

Anna Bassil runs a marathon distance dressed as a cake around her garden in St Albans. The London Marathon was due to take place today but was postponed following the outbreak of the coronavirus disease (COVID-19), St Albans, Britain, April 26, 2020. REUTERS/Paul Childs TPX IMAGES OF THE DAY

Anna Bassil runs a marathon distance dressed as a cake around her garden in St Albans. The London Marathon was due to take place today but was postponed following the outbreak of the coronavirus disease (COVID-19), St Albans, Britain, April 26, 2020. REUTERS/Paul Childs

Anna Bassil runs a marathon distance dressed as a cake around her garden in St Albans. The London Marathon was due to take place today but was postponed following the outbreak of the coronavirus disease (COVID-19), St Albans, Britain, April 26, 2020. REUTERS/Paul Childs

Anna Bassil runs a marathon distance dressed as a cake around her garden in St Albans. The London Marathon was due to take place today but was postponed following the outbreak of the coronavirus disease (COVID-19), St Albans, Britain, April 26, 2020. REUTERS/Paul Childs

Anna Bassil runs a marathon distance dressed as a cake around her garden in St Albans. The London Marathon was due to take place today but was postponed following the outbreak of the coronavirus disease (COVID-19), St Albans, Britain, April 26, 2020. REUTERS/Paul Childs

Frankie Lynch celebrates on the Mall where the finish of the London Marathon was due to take place today after running 2.6 miles instead of 26 miles to raise money for The Running Charity. The marathon was postponed following the outbreak of the coronavirus disease (COVID-19) in London, Britain, April 26, 2020. REUTERS/John Sibley

A Police vehicle is seen on the Mall where the finish of the London Marathon was due to take place today. The marathon was postponed following the outbreak of the coronavirus disease (COVID-19) in London, Britain, April 26, 2020. REUTERS/John Sibley

A combination picture shows a general view on the Mall at the finish of the London Marathon on April 28, 2019 and a general view as a jogger is seen on the Mall where the finish of the London Marathon was due to be today. The marathon was postponed following the outbreak of the coronavirus disease (COVID-19) in London, Britain, April 26, 2020. REUTERS/Paul Childs/John Sibley

Joggers are seen on the Mall where the finish of the London Marathon was due to take place today. The marathon was postponed following the outbreak of the coronavirus disease (COVID-19) in London, Britain, April 26, 2020. REUTERS/John Sibley

Joggers are seen on the Mall where the finish of the London Marathon was due to take place today. The marathon was postponed following the outbreak of the coronavirus disease (COVID-19) in London, Britain, April 26, 2020. REUTERS/John Sibley

A Jogger is seen on the Mall where the finish of the London Marathon was due to take place today. The marathon was postponed following the outbreak of the coronavirus disease (COVID-19) in London, Britain, April 26, 2020. REUTERS/John Sibley

Anna Bassil runs a marathon distance dressed as a cake around her garden in St Albans. The London Marathon was due to take place today but was postponed following the outbreak of the coronavirus disease (COVID-19), St Albans, Britain, April 26, 2020. REUTERS/Paul Childs

Anna Bassil runs a marathon distance dressed as a cake around her garden in St Albans. The London Marathon was due to take place today but was postponed following the outbreak of the coronavirus disease (COVID-19), St Albans, Britain, April 26, 2020. REUTERS/Paul Childs

Anna Bassil runs a marathon distance dressed as a cake around her garden in St Albans. The London Marathon was due to take place today but was postponed following the outbreak of the coronavirus disease (COVID-19), St Albans, Britain, April 26, 2020. REUTERS/Paul Childs

Anna Bassil runs a marathon distance dressed as a cake around her garden in St Albans. The London Marathon was due to take place today but was postponed following the outbreak of the coronavirus disease (COVID-19), St Albans, Britain, April 26, 2020. REUTERS/Paul Childs

Anna Bassil runs a marathon distance dressed as a cake around her garden in St Albans. The London Marathon was due to take place today but was postponed following the outbreak of the coronavirus disease (COVID-19), St Albans, Britain, April 26, 2020. REUTERS/Paul Childs

Anna Bassil runs a marathon distance dressed as a cake around her garden in St Albans. The London Marathon was due to take place today but was postponed following the outbreak of the coronavirus disease (COVID-19), St Albans, Britain, April 26, 2020. REUTERS/Paul Childs

Anna Bassil runs a marathon distance dressed as a cake around her garden in St Albans. The London Marathon was due to take place today but was postponed following the outbreak of the coronavirus disease (COVID-19), St Albans, Britain, April 26, 2020. REUTERS/Paul Childs

Anna Bassil runs a marathon distance dressed as a cake around her garden in St Albans. The London Marathon was due to take place today but was postponed following the outbreak of the coronavirus disease (COVID-19), St Albans, Britain, April 26, 2020. REUTERS/Paul Childs

A message thanking key workers is seen written in chalk on the driveway as Anna Bassil runs a marathon distance dressed as a cake around her garden in St Albans. The London Marathon was due to take place today but was postponed following the outbreak of the coronavirus disease (COVID-19), St Albans, Britain, April 26, 2020. REUTERS/Paul Childs

Anna Bassil runs a marathon distance dressed as a cake around her garden in St Albans. The London Marathon was due to take place today but was postponed following the outbreak of the coronavirus disease (COVID-19), St Albans, Britain, April 26, 2020. REUTERS/Paul Childs

Joggers are seen on the Mall where the finish of the London Marathon was due to take place today. The marathon was postponed following the outbreak of the coronavirus disease (COVID-19) in London, Britain, April 26, 2020. REUTERS/John Sibley

A combination picture shows a general view at the start of the men's elite race of the London Marathon on April 28, 2019 and a general view as a jogger is seen in Blackheath where the start of the London Marathon was due to take place today. The marathon was postponed following the outbreak of the coronavirus disease (COVID-19) in London, Britain, April 26, 2020. REUTERS/Matthew Childs/John Sibley TPX IMAGES OF THE DAY

Joggers are seen in Blackheath where the start of the London Marathon was due to take place today. The marathon was postponed following the outbreak of the coronavirus disease (COVID-19) in London, Britain, April 26, 2020. REUTERS/John Sibley

A jogger is seen in Blackheath where the start of the London Marathon was due to take place today. The marathon was postponed following the outbreak of the coronavirus disease (COVID-19) in London, Britain, April 26, 2020. REUTERS/John Sibley

An Ambulance is seen in Blackheath where the start of the London Marathon was due to take place today. The marathon was postponed following the outbreak of the coronavirus disease (COVID-19) in London, Britain, April 26, 2020. REUTERS/John Sibley

A jogger is seen in Blackheath where the start of the London Marathon was due to take place today. The marathon was postponed following the outbreak of the coronavirus disease (COVID-19) in London, Britain, April 26, 2020. REUTERS/John Sibley

Egyptian trainer, Mohamed Ansari, trains at home during a self-imposed lockdown as Egypt ramps up efforts to slow the spread of the coronavirus disease (COVID-19), in Cairo, Egypt, April 22, 2020. Picture taken April 22, 2020. REUTERS/Sherif Fahmy

A married couple trains at home during a self-imposed lockdown as Egypt ramps up efforts to slow the spread of the coronavirus disease (COVID-19), in Cairo, Egypt, April 22, 2020. Picture taken April 22, 2020. REUTERS/Sherif Fahmy

People run the Stay Safe Marathon during a self-imposed lockdown as Egypt ramps up efforts to slow the spread of the coronavirus disease (COVID-19), in Cairo, Egypt, April 12, 2020. Picture taken April 12, 2020. REUTERS/Mohamed Abd El Ghany

People run the Stay Safe Marathon during a self-imposed lockdown as Egypt ramps up efforts to slow the spread of the coronavirus disease (COVID-19), in Cairo, Egypt, April 12, 2020. Picture taken April 12, 2020. REUTERS/Mohamed Abd El Ghany

Founder of Trifactory, Ayman Haqi, runs the Stay Safe Marathon during a self-imposed lockdown as Egypt ramps up efforts to slow the spread of the coronavirus disease (COVID-19), in Cairo, Egypt, April 12, 2020. Picture taken April 12, 2020. REUTERS/Mohamed Abd El Ghany