A participant runs on stairs during a vertical run event at China World Summit Wing hotel in Beijing, China, September 19, 2015. About 800 runners took part in the event on Saturday, which takes runners up 82 floors, covering a total of 2,041 steps to a height of 330 metres, the organizer said. (Photo by Kim Kyung-Hoon/Reuters)





Participants run on stairs during a vertical run event at China World Summit Wing hotel in Beijing, China, September 19, 2015. (Photo by Kim Kyung-Hoon/Reuters)





A participant reacts as he runs on stairs during a vertical run event at China World Summit Wing hotel in Beijing, China, September 19, 2015. (Photo by Kim Kyung-Hoon/Reuters)





A participant reacts as he approaches to the finish line during a vertical run event at China World Summit Wing hotel in Beijing, China, September 19, 2015. (Photo by Kim Kyung-Hoon/Reuters)





A participants encourages another exhausted participant during a vertical run event at China World Summit Wing hotel in Beijing, China, September 19, 2015. (Photo by Kim Kyung-Hoon/Reuters)





A exhausted participant reacts during a vertical run event at China World Summit Wing hotel in Beijing, China, September 19, 2015. (Photo by Kim Kyung-Hoon/Reuters)





A exhausted participant reacts during a vertical run event at China World Summit Wing hotel in Beijing, China, September 19, 2015. (Photo by Kim Kyung-Hoon/Reuters)





A couple kisses during a vertical run event at China World Summit Wing hotel in Beijing, China, September 19, 2015. (Photo by Kim Kyung-Hoon/Reuters)





A participant runs barefoot on stairs during the vertical run event at China World Summit Wing hotel in Beijing, China, September 19, 2015. (Photo by Kim Kyung-Hoon/Reuters)





Women's winner Suzy Walsham of Australia reacts after finishing at the vertical run event at China World Summit Wing hotel in Beijing, China, September 19, 2015. (Photo by Kim Kyung-Hoon/Reuters)





An exhausted participant reacts during the vertical run event at China World Summit Wing hotel in Beijing, China, September 19, 2015. (Photo by Kim Kyung-Hoon/Reuters)