MOSCOW - JUN 11: Urheilija kulkee radalla kansainvälisessä urheilukilpailussa Moskova Challenge Luzhnikin olympiakompleksissa 11. kesäkuuta 2012, Moskova, Russi . - Kuvapankin materiaali ja video

MOSCOW - JUN 11: Sportswoman runs by track during race on international athletic competition Moscow Challenge in Luzhniki Olympic Complex on 11 June 2012, Moscow, Russi.

MOSCOW - JUN 11: Sportswomen run long-distance race during international athletic competition IAAF World Challenge in Luzhniki Olympic Complex on 11 June 2012, Moscow, Russia

Sportsmen of athletic team training, running on sports field, marathon race

Drone footage of track athletes at running track, competing in a race

Two strong rivals competing at stadium, running fast, preparing for marathon

MOSCOW - JUN 11: Sportswoman runs by track during race on international athletic competition Moscow Challenge in Luzhniki Olympic Complex on 11 June 2012, Moscow, Russi.

MOSCOW - JUN 11: Sportswomen run long-distance race during international athletic competition IAAF World Challenge in Luzhniki Olympic Complex on 11 June 2012, Moscow, Russia

MOSCOW - JUN 11: Athletes preparing for race on international athletic competition IAAF World Challenge in Luzhniki Olympic Complex on 11 June 2012, Moscow, Russia

MOSCOW - JUN 11: Runners overcome obstacle during race on international athletic competition IAAF World Challenge in Luzhniki Olympic Complex on 11 June 2012, Moscow, Russia

MOSCOW - JUN 11: Sportsmen run on track of Grand Sports Arena of Luzhniki Olympic Complex at international athletics competitions IAAF World Challenge Moscow Challenge on 11 June 2012, Moscow, Russia.

MOSCOW - JUN 11: Racetrack at Grand Sports Arena of Luzhniki Olympic Complex during international athletics competitions IAAF World Challenge Moscow Challenge on 11 June 2012, Moscow, Russia.