04/18/2012 06:08 EDT | Updated 06/18/2012 05:12 EDT

MacLennan hopes to inspire Canadians when she marches in opening ceremonies

TORONTO - When Rosie MacLennan was little, she would march around her living room during the Olympic opening ceremonies.

In exactly 100 days, MacLennan will be marching for real when the curtains go up on the 2012 Games in London.

MacLennan and fellow trampoline gymnasts Karen Cockburn and Jason Burnett were feted in a small ceremony Wednesday to mark the 100-day countdown to the July 27 opening ceremonies.

MacLennan hopes there will be young Canadians watching that day when the Canadian team — expected to be some 275-athletes strong — march into Olympic Stadium.

"Hopefully we'll be able to inspire some young kids again to really get out and get active," said MacLennan, a native of King City, Ont.

Her wish was fitting, coming on the same day London 2012 chairman Seb Coe announced the official motto for the Games: "Inspire a generation."

The Canadian Olympic Committee has set a lofty goal for London — to finish among the top-12 countries in overall medals, and among the top eight at the Paralympics. Canada captured 18 medals at the 2008 Beijing Games to finish 19th on the medal table in gold medals won, and 14th in total medals.

Cockburn, who will make her fourth Olympic appearance in London, believes the goal is reachable.

"Objectives are based on results over the years leading up to the Games, so we can set an achievable goal," the 31-year-old said. "And I think we have a great strong team with lots of veterans and lots of new talent too."

The Toronto native and her teammates are in the middle of a gruelling chunk of training, on the trampoline nine times a week and in the weight room another three times. Saturday is their only day off.

"These next 100 days to be pushing ourselves on a daily basis," said Cockburn, who carried Canada's flag at the closing ceremonies of the 2008 Beijing Games.

She said 100 days is going to fly by.

"It seems like a short time to an Olympian who is working in a four-year cycle and also for me, who's been training for 20 years ... 100 days is nothing, it's crunch time for us now."