A woman who has been pregnant for eight months warms up before participating in an annual 3.5 km running event at the Beijing Olympic Forest Park on Feb. 23, 2014. This woman, Xu Yunyun, was another highlight of the "Undie Run" event. When asked about the risk to her health, the woman said, "The risks posed by outdoor sports are nothing more than catching a cold or getting injured from falling down, but a lack of exercise can cause diseases like gestational hypertension for women. So I chose to attend the event to keep healthy and prepare for my baby's delivery."  [Photo/ifeng]