MacLennan's total score of 55.130 was bested by Lui LingLing of China who won the event with a score of 55.990.
The 26-year-old native of King City, ON advanced to the final after finishing second in the semi final with a total score of 55.770
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MacLennan entered the event as the reigning World Trampoline champion.
A decorated medalist, one of her many accomplishments includes a gold medal performance at the 2012 London Olympics.