https://community.usms.org/swimming/f/open-water-training-and-technique/25744/tamooz2i swim daily in the winter in open sea for one hour, the temperature between 18 to 22 degree centigrade if any one think it&#39;s unhealthy I would appreciate a word with explanation why is there is any risk on my health , my age 69,en-USTelligent Community 12https://community.usms.org/thread/272426?ContentTypeID=1Thu, 26 Jan 2017 11:57:32 GMT3187ac58-ba85-4314-b79a-c45cd885e09a:8c43d3b4-7f5f-4b11-976d-6e8ee6f986e1BobBruceThere&#39;s nothing inherently unheathy about this. I&#39;m a bit jealous because my local lakes are frozen. Enjoy your swimming!<div style="clear:both;"></div>