- Who
- Yuri Bertolini
- What
- 17:51 minute(s):second(s)
- Where
- Switzerland (Lausanne)
- When
The fastest 1 km swim (one arm) in open water is 17 min 51 sec, and was achieved by Yuri Bertolini (Switzerland), in Lausanne, Switzerland, on 17 July 2023.
Yuri has been swimming since he was a child and now swims five times a week. He practiced swimming with one arm numerous times to find the most efficient style.