@livelongandstronger: Use cold exposure to induce shivering to create "brown fat " to significantly improve our metabolic health. Poor metabolic health is the route cause of all major human illnesses so finding ways to improve that is of immense value to our longevity. brown fat , being highly metabolic helps us burn more calories at rest, raising our metabolism. And shivering is the catalyst for that creation! #longevity #longevitylifestyle #coldwaterswimming #metabolichealth #healthyliving #personaltrainer