Stop Avoiding Stress, It's Making You Weak: Cortisol & Inflammation | Dr. Tommy Wood

Why It Matters

Framing exercise-induced stress as beneficial reframes health advice: controlled, recoverable stressors (exercise) lower long-term inflammation and improve tolerance to psychological stress, whereas chronic, unresolved stress drives disease risk and functional decline.

Summary

Dr. Tommy Wood argues that acute stress and inflammation from exercise are adaptive, not harmful, because they redirect resources to performance and trigger repair and long-term reductions in baseline inflammation. He explains that short-term rises in cortisol and cytokines during workouts — like high-intensity interval protocols — drive tissue adaptation and increase stress tolerance. The danger, he says, is chronic stress or persistent inflammation, which reflects failure to recover and raises disease risk. Avoiding normal stressors reduces capacity and resilience, creating a cycle of declining function.

Original Description

Cortisol is bad. Inflammation is bad. Stress is bad. Sound familiar? Neuroscientist Dr. Tommy Wood explains why this social media narrative is not only wrong — it's actually making us less resilient. Acute stress and inflammation aren't the enemy. Chronic stress and inflammation are. And by avoiding every uncomfortable challenge, we're creating a vicious circle that quietly erodes our capacity over time. If you've ever wondered whether intense exercise is "too hard on your body," this one's for you.

Watch the full episode at https://youtu.be/nJhZnzvW-DU