Most people judge their health by how they feel. Feelings lie. Your nervous system doesn't. There's a measurement called Heart Rate Variability (HRV): the tiny changes in time between each heartbeat. It sounds backwards, but a healthy heart is NOT a perfect metronome. More variability generally means your nervous system can shift gears well, from stress mode to recovery mode and back. Low HRV = your body is stuck with the gas pedal down. Higher HRV = your body knows how to hit the brakes and recover. WHAT USUALLY DRIVES IT DOWN: • Alcohol, even 1–2 drinks. Research shows it cuts how much your nervous system recovers during sleep, and more drinks = a bigger hit. • Eating late, poor sleep, chronic stress, overtraining. WHAT HELPS IT: • Slow breathing at about 6 breaths per minute (in 5 seconds, out 5 seconds) for 5–10 minutes. This "resonance breathing" is one of the most-studied ways to boost HRV in the moment. • A consistent sleep schedule. • A real aerobic base: steady cardio where you can still talk. WE DON'T GUESS. WE TEST. Want to try it? 1. If you wear an Oura, Whoop, Apple Watch or Garmin, write down your average HRV today. 2. 2. For 7 days: 5 minutes of 5-in / 5-out breathing before bed, and no alcohol. 3. 3. Next Sunday, post your before and after number below. 4. No wearable? Try it anyway and tell us how your sleep and energy changed. Question for you: do you track anything right now? What's surprised you most? --- Keep going: → Comment below. I read every one. → Bring someone with you: share skool.com/naturalholisticliving with the person in your life who's always "tired and wired." Free to join. → Want us to actually look at YOUR nervous system? Book a visit at 918chiropractic.com — Midtown Tulsa & Owasso. → Follow along daily on Instagram: @918_chiropractic and @dr.mattgriswold This is the nervous system we work on every day at 918. Now you get to see it in numbers.