The maximum safe duration for swimming in the sea during the resort season is 10-15 minutes.
After that, you must go ashore and warm up.
Russian expert Yevgeny Kudryashov says it's better to swim several times interspersed with rest on the beach.
Prolonged stay in water can cause hypothermia, vascular spasms, and heart problems.
The optimal time for sunbathing is from 7:00 to 10:00 AM and after 4:30 PM.
