As a longevity researcher and psychiatrist, I've seen how toxic stress can wear out our cells prematurely and increase the risk of obesity, heart disease, dementia and depression. To slow down aging and prevent things from reaching a chronic state, I use a technique called "stress fitness." Stress fitness: A dose of healthy stressStress fitness is a way of exercising the body with short bursts of stress. How to practice stress fitnessI like to do my stress fitness exercises in the mornings a few times a week, or at least once a week. High-intensity interval training (HIIT) Complete one round of high-intensity interval training, which takes roughly seven minutes.

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