Ryan Cochrane and Tianna Rissling led Canadian podium sweeps while Cesar Cielo and Joanna Maranhao collected titles for Brazil at USA Swimming's Missouri Grand Prix meet. Top Canadian swimmers are in training for their nation's Olympic trials that begin in Montreal on March 27 and showed their form for a fourth podium sweep of the meet after having done it in the women's 200-meter freestyle and 100m breaststroke on Friday. Cochrane won the 400 Freestyle in 3mins 53.47secs with Keegan Zanatta .13 behind and Kier Maitland third in 3:56.18. Rissling flipped spots with Jillian Tyler from the 100 breaststroke sweep to capture the 200 breaststroke on Saturday in 2:27.98 with Tyler second in 2:29.93 and Mariya Chekanovych third in 2:30.05. In a showdown of sprint stars, Cielo won the 50 freestyle in 22.13 seconds with Frenchman Frederick Bousquet second in 22.26 and American Jason Lezak third in 22.75. Maranhao won the 200 butterfly in 2:09.73 with American Elaine Breeden second in 2:10.14. In the women's 100 backstroke, American Rachel Bootsma won in 1:00.20, edging France's Laure Manaudou by .6 of a second with Canada's Juli Wilkinson third in 1:01.08 American Amanda Weir won the women's 50 freestyle in 25.44 with Jane Trepp .05 behind. American Eric Shanteau won the men's 200 breast in a meet-record 2:10.47, lowering his own mark from 2008 by .39 of a second, while Jose Schooling won the 200 butterfly in 2:00.08 and Matt Grevers took the 100 backstroke in 53.57.