The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
perhaps more importantly, we're going to talk about the incredibly positive benefits both at the level of neural changes SOC called neuroplasticity which is the literal rewiring of neural connections as well as psychological benefits reduced anxiety improved mood improved sleep and improved immune function that are the consequence of doing this four bouts of 15 to 30 minute writing protocol
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so what we're pulling together here is a mechanistic understanding of why something like writing for 15 to 30 minutes about a stressful or traumatic episode would or even could induce all these positive shifts in mental and physical health and while we don't have a complete understanding about the underlying mechanisms the activation and the neuroplasticity of the prefrontal cortex seems to be one of the most logical and the most likely that sits at the center of at least the top list of the most important mechanisms
what they did was to essentially have people do the exact same protocol that we've been describing throughout today's episode but they also included blood draws from the subjects in those experiments and they collected that blood from subjects both before and after the writing episodes