Winter swimming january and firs part febrary

Was swimming 5 times in January and 3 times in February.

2 times in January was something like mixed open water with ice i was swimming for 30- 50 seconds
another visit was ice hole i was used periodization 1 time just enter and exit another day 1.10 seconds.Again just enter and exit and 1 minute 30 seconds and again just enter and exit