四种游泳竞技姿势哪种最快？

四种游泳竞技姿势哪种最快？

数据说话：
世界50米池游泳纪录(男子)
EVENT SWIMMER NAT TIME DATE PLACE
自由泳
50 FREE Alexander Popov RUS 21.64 June 16, 2000 Moscow, RUS
100 FREE Pieter vd Hoogenband NED 47.84 Sept. 19, 2000 Sydney, AUS
200 FREE Ian Thorpe AUS 1:44.06 July 25, 2001 Fukuoka, JPN
仰泳
50 BACK Thomas Rupprath GER 24.80 July 27, 2003 Barcelona, ESP
100 BACK Aaron Peirsol USA 53.17 April 2, 2005 Indianapolis, USA
200 BACK Aaron Peirsol USA 1:54.66 July 29, 2005 Montreal, CAN
蛙泳
50 BREAST Oleg Lisogor UKR 27.18 August 2, 2002 Berlin, GER
100 BREAST Brendan Hansen USA 59.30 July 8, 2004 Long Beach, USA
200 BREAST Brendan Hansen USA 2:09.04 July 11, 2004 Long Beach, USA
蝶泳
50 FLY Roland Schoeman RSA 22.96 July 25, 2005 Montreal, CAN
100 FLY Ian Crocker USA 50.40 July 30, 2005 Montreal, CAN
200 FLY Michael Phelps USA 1:53.93 July 22, 2003 Barcelona, ESP
参考资料：swimming.sport.org.cn/yy/yyjl/2006-10-09/30713.html