Fantastic ,Peggy , you are on th right track. I also ran on the beach at 6am for over 30 years. After a couple of years I decided, in the miiddle of summer, to swim to also swim until the water was too cold.. It never became too cold as sea water temperature is not as cold as the sand or air?. In fact the warmest place on the beach, is in the water. When we go to the beach on an extremely hot day, and somebody spashes water, we nearly die, but once in the water , it is deliciously cooling. Its the initial dive that is hard for many. In winter it is only the initial dive also. Many a time I have run across frost covered sand and dived in to the warmest part ogf the beach. I had created A new fantastic habit, and the rewards were plentiful. I now realise my brain had changed. Benefits are I rarely get a cold or flu.I am wearing lighter clothing. I do not own a singlet, scarf, pullover , gloves or overcoat. My health also improved to srabe that at age 89 I am on nil medication or tablets of any kind. My PN is hereditary. Now practicing Neuroplasticity, am experiencing improvment, small, but definite, BUT happening .Good luck and best wishes. Just GO FOR IT! Anoth habit and brain change is eating with chop sticks.