The Swedish swimming team has had eight days of preparation in Singapore when the World Championship in long course starts on Sunday.
The nation in Southeast Asia is located about 14 miles north of the equator, which makes the climate tropical.
The temperature has been a little over 30 degrees for most of the day in recent days and a short walk is enough for the sweat to start flowing.
The heat wave at home in Sweden can be tough in some situations, but with the humidity in Singapore, it becomes an even greater challenge for both swimmers and ordinary people.
Sweden's two long-distance swimmers, Victor Johansson and Thilda Häll, swim 400, 800 and 1,500 meters freestyle in the World Championship and thus have a very tough program.
Both have 400 meters freestyle on the program on Sunday.
"Keep me cool"
The swimming competitions are held indoors and it's about minimizing the time outdoors. That's at least Victor Johansson's recipe.
I try to keep myself cool indoors as much as possible. Not be out in the heat so much. Then it's about drinking a lot and getting salt.
We got a pretty good review of this from Stig Mattsson at SOK (Swedish Olympic Committee), our nutrition advisor, and it's just that if you only drink water, you pee out most of it. But if you get about three teaspoons of salt per liter of water you drink, the body is much more receptive to the fluid you get, says Victor Johansson, World Championship sixth in both 400 and 800 meters freestyle last year.
Lots of water
There is no general recommendation for how much the swimmers should drink, it varies from person to person, but before the European Championship in Rome 2022 - which was held outdoors - it was talked about five-six liters of water per day.
I try to have my water bottle with me all the time and some snacks too. The last thing you want is to get dehydrated, then the performance curve goes down directly, says Johansson.
The air conditioning indoors is a great help - but also risks leading to colds. Moderate is best, says breaststroke swimmer Sophie Hansson:
It's not super nice with the humidity, but getting used to it is to expose yourself to it, not just being indoors with the AC.
The swimming World Championship continues until next Sunday.
