Psychological flexibility is often misunderstood as simple “toughness” or insensitivity to stress. However, true resilience is the brain’s ability to adapt and recover after a stressful event. Researchers at Kochi University of Technology (KUT) and Shizuoka Institute of Science and Technology (SIST) have discovered that this recovery process does not reach peak immediately; Instead, it appears in a separate “flexibility window” about an hour later.

