Razvoj svjetskih rekorda na 400m mješovito i 50m leđno:L

400m MJEŠOVITO:

4:23.68 Rod Strachan (SAD) 25.7.76

4:23.39 Jesse Vassallo (SAD) 4.8.78

4:20.05 Vassallo 22.8.78

4:19.78 Ricardo Prado (Bra) 2.8.82

4:19.61 Jens-Peter Berndt (I. Nje) 23.5.84

4:17.53 Alex Baumann (Kan) 17.6.84

4:17.41 Baumann 30.7.84

4:16.12 David Wharton (SAD) 14.8.87

4:15.42 Tamas Darnyi (Mađ) 19.8.87

4:14.75 Darnyi 21.9.88

4:12.36 Darnyi 8.1.91

4:12.30 Tom Dolan (SAD) 6.9.94

4:11.76 Dolan 17.9.00

4:11.09 Michael Phelps (SAD) 15.8.02

4:10.73 Phelps 6.4.03

4:09.09 Phelps 27.7.03

50m LEĐNO:

25.13 Jeff Rouse (SAD) 9.4.93

24.99 Lenny Krayzelburg (SAD) 28.8.99

24.80 Thomas Rupprath (Nje) 27.7.03