19 Jul '11, 4am

Vigorous gym exercise session shakes building in Seoul, sending hundreds fleeing.

Vigorous gym exercise session shakes building in Seoul, sending hundreds fleeing.

Firefighters arrive in front of TechnoMart mall in eastern Seoul July 5, 2011. -- PHOTO: REUTERS SEOUL - SOUTH Korean experts said on Tuesday they believe a vigorous gym exercise session caused a high-rise building in the capital to shake for 10 minutes this month, prompting hundreds to flee in panic. They said tests showed that oscillations created by a group of Tae Bo practitioners on the 12th floor of the 39-story TechnoMart mall building apparently resonated through the structure. Tae Bo is an aerobic exercise routine that involves performing the motions of boxing and martial arts such as Taekwondo at a rapid pace. Professor Chung Lan of Danguk University in Yongin City near Seoul linked the incident to a physics principle under which catastrophic failures can occur when the vibration of a structure is matched by another source. He told a radio programme that the build...

Full article: http://www.straitstimes.com/BreakingNews/Lifestyle/Story/...

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