19 Jul '11, 5am

Remember that Jason Garfield Tae Bo vid from years ago? Not so funny now is it - #juggling

SEOUL: South Korean experts said 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 building, constructed from iron girders and cement, had a characteristic vibration frequency which was "in...

Full article: http://www.channelnewsasia.com/stories/afp_asiapacific/vi...

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

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