7 of 61: One of the festivities surrounding the Chevron Houston Marathon this weekend is the Ironman Sports Medicine Institute at Memorial Hermann EXPO being held at the George R. Brown Convention Center. Vendors from across the country are showcasing the latest in running gear and fitness products. The event is free and runs from 11am until 7pm Friday and 9am until 7pm Saturday. ( Photo / ABC13/Blanca Beltran)

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