WINDSOR, England - Victoria's Lindsay Jennerich and Patricia Obee, world silver medallists last year, failed Thursday to advance to the final of the lightweight women's double sculls at the Olympic regatta.

Only the top three in the semifinal moved on and the Canadians finished fourth. They started well but faded quickly and were fifth after 500, 1,000 and 1,500 metres. They posted the fastest last 500 but it was too little, too late.

China won in seven minutes 10.39 seconds, ahead of Denmark and Australia. Canada's time was 7:14.83. Britain, Greece and Germany moved out of the other semifinal.

"A tough one to swallow," said Jennerich, fighting to keep her composure behind wraparound sunglasses as she talked to reporters.

"It takes a little while to set in. ... I said to Obee, this might capture it well, it's like 'There's seven minutes of your life that suddenly take you out of a shot at an Olympic medal.'"

Jennerich and Obee had a poor start to the Games, finishing fifth in their six-boat heat. But the duo bounced back to finish second to the U.S. in their repechage Tuesday. The semifinal was another disappointment, however, denying Canada a shot at a medal.

The Canadian women's eight went for gold in the last race of the day. The men's eight won silver Wednesday.

The men's pair of Dave Calder and Scott Frandsen represents Canada's only other medal hope in rowing. They race in the final Friday.

Jennerich, who turned 30 on Monday, shared the boat with both 20-year-old Obee and 37-year-old Tracy Cameron of Shubenacadie, N.S., in the leadup to the Games.

In 2010, Jennerich and Cameron teamed up to win the world championship.

Last year they won in Lucerne, Switzerland, a major regatta ahead of the world championships. But when Cameron was sidelined with a stress fracture of a rib, Jennerich joined forces with Obee, the team spare, to win silver at the worlds.

Healthy again, Cameron won a row-off with Obee to see who would join Jennerich this year. But Jennerich and Cameron struggled when they got back in the boat, finishing eighth in May at a key pre-Olympic regatta in Lucerne.

Cameron, who won the lightweight quadruple sculls at the 2005 world championships and Olympic bronze in 2008 in the pair with Melanie Kok, retired in early June, saying rowing was no longer fun.

Jennerich said the pre-Games preparations were not ideal, "but it's what you make of it."

The circumstances "were handled like champions," she added.

In the women's lightweight class, rowers can weigh no more than 130 pounds and the crew average weight can't exceed 125.

The men's four of Michael Wilkinson of North Vancouver, Anthony Jacob of Victoria, Dean Will of Kelowna, B.C., and Derek O'Farrell of Montreal finished fifth in their semifinal and failed to make the final.

Michael Braithwaite of Duncan, B.C., and Kevin Kowalyk of Winnipeg finished last in a tough double sculls B final that featured 2008 Olympic champion Australia and world bronze medallist France. The Canadians finished the regatta in 12th spot.

NOTES — The men's eight got to eat Big Macs and meet Johnnie Mac after their silver medal performance Wednesday. CTV bought the rowers 140 pounds worth of McDonald's, allowing them to indulge a taste for junk food after months of good nutrition. Then the rowers met former tennis star turned commentator John McEnroe outside the International Broadcast Centre.

Also on HuffPost:

Loading Slideshow...
  • Not Strong Enough

    Canada's Marie-Eve Beauchemin-Nadeau competes during the women's 69-kg weightlifting competition at the 2012 Summer Olympics, Wednesday, Aug. 1, 2012, in London. Beauchemin-Nadeau finished 8th.

  • Canada's First Silver Medal

    Canada's men's eight rowing team members Gabriel Bergen, left to right Douglas Csima, Rob Gibson, Conlin McCabe, Malcolm Howard, Andrew Byrnes, Jeremiah Brown, Will Crothers, and cox Brian Price celebrate their silver medal at Eton Dorney during the 2012 Summer Olympics in Dorney, England on Wednesday, August 1, 2012.

  • Still Chasing Her Seventh

    Clara Hughes of Canada powers to the finish line in the Women's Olympic Cycling Time Trial in London on Wednesday August 1, 2012.

  • Missing The Mark

    Canada's Marie-Pier Beaudet shoots during an elimination round of the individual archery competition at the 2012 Summer Olympics, Wednesday, Aug. 1, 2012, in London.

  • They Couldn't Deliver

    Canada's Alexandre Despatie (back to camera) hugs teamate Reuben Ross after their sixth place finish in the men's synchronized 3-metre springboard diving final at the 2012 Summer Olympics Wednesday, August 1, 2012 in London.

  • Close, But No Cigar

    Canada's Tamara Tatham (13) drives to the basket against France's Isabelle Yacoubou during a women's basketball game at the 2012 Summer Olympics, Wednesday, Aug. 1, 2012, in London. Team Canada lost to France 64-60.

  • On To The Finals

    Canada's Jarvis Morgan, left, and Douglas Vandor row in the lightweight men"s double sculls men's pair semifinal during the 2012 Summer Olympics in Dorney, England on Wednesday, August 1, 2012.

  • Man Of Bronze

    Brent Hayden adjusts his goggles at the start of the 100 meter freestyle event at the Canadian Olympic Swimming Trials in Montreal, Friday, March 30, 2012. Hayden brought home Canada's sixth medal of the London Games on Wednesday, August 1, 2012.

  • Second Chances

    Canada's Alex Bruce, left, and Michele Li celebrate after beating Leanne Choo and Renuga Veeran, of Australia, in a women's doubles badminton match at the 2012 Summer Olympics, Wednesday, Aug. 1, 2012, in London.

  • Finishing Fourth

    Canada's Samantha Cheverton, left, Amanda Reason and Barbara Jardin, right, cheer on Brittany Maclean as the women's 4 x 200-metre freestyle relay team swims to a second place finish in their heat at the 2012 Summer Olympics Wednesday, August 1, 2012 in London. The women would ultimately finish fourth in the race behind France, The United States and Australia.