Disappointed to see Wim Hof method not mentioned in "Other techniques".
You don't have to buy into the whole breathing as a lifestyle thing, but if you've ever jumped into frigid water, the simple act of breathing in through the nose and out through the mouth in a controlled way can stop your body from shivering possibly long enough to save your life.
You don't have to buy into the whole breathing as a lifestyle thing, but if you've ever jumped into frigid water, the simple act of breathing in through the nose and out through the mouth in a controlled way can stop your body from shivering possibly long enough to save your life.