The fastest time to swim 50 m (164 ft) underwater in a 25-m (82-ft) pool is 32.68 seconds by Andrew Vonasch (USA) in the Bellevue Club Pool in Bellevue, Washington, USA, on 1 August 2006

No fins or any other swimming aids were worn during the attempt.

Smashed the previous GWR by over 6 seconds.