Progressive Muscle Relaxation

Developed by Edmund Jacobson in the 1930s, progressive muscle relaxation (PMR) involves systematically tensing and releasing muscle groups for 5-10 seconds each. A 2020 Cochrane review found it significantly reduces anxiety, lowering blood pressure by 5-10 mmHg—more effective than #3 Forest Bathing for acute stress relief. It's used clinically for insomnia, PTSD, and chronic pain, with a 70% success rate in reducing nighttime awakening. The mechanism: your nervous system can't maintain fight-or-flight when muscles are deliberately relaxed, cutting cortisol levels by 30% in 15 minutes.