The Refresher Journal
Five breathing techniques. One quiet app. Field notes on the science, the steps, and what each one is really for.

4-7-8 Breathing for Sleep: Dr. Andrew Weil's Method, Explained
An asymmetric breathing pattern with a long, deliberate exhale. Built to engage the vagus nerve and tip the body into the parasympathetic state that precedes sleep.

Box Breathing: The 4-4-4-4 Technique Used by Navy SEALs
A simple breathing pattern with four equal phases — inhale four, hold four, exhale four, hold four. Used by special forces before high-stakes moments to lower heart rate and sharpen focus.

The Five Breathing Techniques in Refresher — and How to Pick One
A side-by-side comparison of box breathing, 4-7-8, coherent breathing, the Wim Hof method, and silent timed meditation. With a short decision tree for picking the right one for the moment.

Coherent Breathing at 5.5 Breaths per Minute: The HRV Sweet Spot
A continuous, equal-phase breath at the body's resonance frequency. The pattern that maximises heart rate variability and synchronises the cardiovascular and respiratory systems.

Silent Timed Meditation: Why a Bell, a Timer, and a Cushion Still Win
No prescribed pattern, no guidance. A bell at the start, a bell at the end, and the breath you already have. The oldest practice on this list, and often the most useful one.

The Wim Hof Method: A Beginner's Guide to the Power-Breath-and-Hold Cycle
An advanced breathing protocol with three rounds of rapid hyperventilation followed by progressive breath retention. The method that produced the first peer-reviewed evidence of voluntary immune system modulation.