• The front cover of “The HRV Book: What Your Wearable is Actually Telling You and What You Can Do About It!” by Don Moxley, published by Mode Method LLC, features a minimalist design with text and a small heartbeat line graphic, elegantly introducing the concept of heart rate variability as a crucial recovery signal.
  • Sure! Here’s a rewritten version of your sentence using the provided product data: Against a black background, white and blue text highlights that a perfectly steady heartbeat isn’t healthy—and that heart rate variability (HRV) signals recovery and nervous system health, as explained in “The HRV Book: What Your Wearable is Actually Telling You and What You Can Do About It!” by Mode Method LLC.
  • A blue graphic with black text stating: “Your device is a thermometer. This book makes you the thermostat,” along with additional information about The HRV Book: What Your Wearable is Actually Telling You and What You Can Do About It! by Mode Method LLC and how understanding heart rate variability can become your ultimate recovery signal.
  • Here’s a rewritten version of the sentence, incorporating the product data: Slide with text: “A single morning’s data can be mostly noise—a glass of wine, a warm bedroom, or a shifted ring can all throw it off. But when three or four mornings in a row tell the same story, that consistent pattern is what matters most. This repeated recovery signal—shown by your heart rate variability—is where The HRV Book: What Your Wearable is Actually Telling You and What You Can Do About It! from Mode Method LLC helps
  • Turquoise graphic stating: “38,000 people. One clear pattern.” Text discusses a connection between lower heart rate variability (HRV) and increased risk of death across diverse groups, summarizing decades of research as featured in The HRV Book: What Your Wearable is Actually Telling You and What You Can Do About It! by Mode Method LLC.
  • Black background with white and teal text explains that building a habit actually takes around a month—not just 21 days—because the nervous system needs four weeks to establish a reliable baseline, much like how The HRV Book: What Your Wearable is Actually Telling You and What You Can Do About It! by Mode Method LLC describes tracking recovery signals like heart rate variability.
  • A teal graphic with text explaining that HRV numbers, or heart rate variability, should not be compared between spouses, as healthy individuals have different baselines. For more insights on interpreting your own recovery signal, check out The HRV Book: What Your Wearable is Actually Telling You and What You Can Do About It! by Mode Method LLC.
  • Text graphic stating: Sleeping is not the same as recovering. Alcohol can decrease heart rate variability (HRV) by 28–33%, and sleep trackers might not show this effect on your recovery. From The HRV Book: What Your Wearable is Actually Telling You and What You Can Do About It! by Mode Method LLC.
  • A blue graphic from The HRV Book by Mode Method LLC explains a simple, cost-free breathing technique—six breaths per minute, five seconds in and out—to boost your recovery signal and improve heart rate variability.
  • Infographic highlighting that engaging in 4–7 sauna sessions per week is associated with a 50% reduction in fatal cardiovascular risk over more than twenty years of research—emphasizing the benefits for heart rate variability discussed in *The HRV Book: What Your Wearable is Actually Telling You and What You Can Do About It!* by Mode Method LLC.
  • Teal graphic featuring the heading “10 / The Early Warning,” a bold statement on how the body detects sickness early, and a brief explanation of readiness scores and recovery signals from *The HRV Book: What Your Wearable is Actually Telling You and What You Can Do About It!* by Mode Method LLC.
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The HRV Book: What Your Wearable is Actually Telling You and What You Can Do About It!

$19.99

This product is a Digital E-Book Download 

You already own the hardware. What you haven't owned yet is the dial.

You bought the ring. Or the wristband. You put it on, and every morning it hands you a number — your heart rate variability, the single most informative signal your device produces about your recovery. Most people treat that number like a thermometer. They check it, they feel good or bad about it, and they never touch the dial.

Don Moxley, author of The HRV Book, has spent four decades on the sidelines with Olympic and world-class athletes, measuring recovery capacity with chest straps and lab equipment long before any of it fit on a finger.

The signal your consumer device now reads every night is the same one he watched to know whether an athlete's body had absorbed yesterday's work — or was quietly falling behind it.

In The HRV Book, he shows you how to read that signal for yourself, what actually moves it, and how you can use it as the recovery signal it was intended to be.

$19.99

How do I access my E-Book?

Upon purchasing The HRV Book, you will receive an email containing the downloadable PDF file of the book. Simply follow the instructions of that email to access your copy of The HRV Book.

What you'll learn:

  • What your score is really calculating — where your wearable's algorithm adds genuine insight, and where it flattens something more complicated into a single figure.

  • Why one morning's number is mostly noise — and how many days of data it takes before a trend is worth trusting.

  • How to build a baseline you can rely on, and why comparing your number to anyone else's tells you almost nothing.

  • The levers that actually change the number — sleep, breath, training load, heat and cold, what you eat and drink, and the people in your life — each with the research laid out honestly.

  • Where the science is strong, and where it isn't — no overselling, no miracle claims, just what the evidence supports at each turn.

Who it's written for:

The athlete, learning when to push and when to protect tomorrow.

The parent, trying to keep enough in reserve to be present after a hard day.

The grandparent, working to make the most of a third third of life that holds far more room for growth than anyone warned them.

Three people, one number — and one practice that serves all of them.

An honest book about your body. This is not a book that promises a higher number will fix your life. It's a book that earns your trust one careful claim at a time — so that when it asks something harder of you, slow down, recover more, breathe for five quiet minutes — you'll hopefully believe that it's worth trying for yourself.

About the author:

Don Moxley is the Chief Science Officer at Mode + Method and co-creator of HRV+.

He was Ohio State's first sports scientist, a Big Ten championship-winning captain, and has spent 30+ years in human performance — supporting athletes to 2 Olympic medals, 4 world championships, and 7 national championships, all while pioneering HRV-based athlete monitoring before the technology ever reached consumers.

The Science Behind HRV+

  • A diagram depicting the molecular structure using the method of molecular modeling.

    Proprietary Hemp Oil Extract

    Our bodies produce endocannabinoids (molecules like those found in cannabis but are produced in our bodies) when we move and exercise. Research shows that consuming exogenous cannabinoids, such as those found in our high-quality hemp extract, as well as other plant chemicals called terpenes, increases the levels of natural endocannabinoids and personal performance.

  • A plane flying in the sky on a black background.

    Omega-3 Oil (DHA/EPA/SPM’s)

    Omega-3 fats may have anti-inflammatory properties. In fact, the Omega-3 fats DHA and EPA eventually become specialized pro-resolving mediators (SPMs) that play a critical role in resolving intercellular stress in our cells. 

  • A black background with a plane flying in the sky representing HRV recovery.

    Magnesium Carbonate

    Research suggests that magnesium is important for the regulation of calcium balance. Magnesium is critical for energy production and metabolism, as well as muscle contraction and nerve impulse transmission. In addition, magnesium is known for its relaxing and stress-reducing effect, helping promote normal recovery.

  • A black background with a plane flying in the sky showcasing heart rate variability (HRV) recovery.

    Curcumin Extract

    Extracted from Turmeric,  Curcumin is a natural antioxidant with potential anti-inflammatory benefits. Studies show that Curcumin may have an effect on oxidative stress and may be protective against free radicals, promoting healthy muscle recovery. 
A young woman in tie dye joggers practicing HRV techniques while leaning against a wall.

What people are saying...

"I am all about performance and longevity, HRV is part of tracking progress for both. I love how HRV+ delivers on both."

- Shelly Edington, Crossfit Masters World Champion


"I've definitely seen an improvement in my HRV! Sleep has been amazing."

- Joey McKenna, USA Wrestling National Team Member


"I’ve experienced a significant improvement in sleep quality, faster recovery, and an objective uptick in my average HRV" 

- Eric Malzone, Host - The Future of Fitness Podcast


"I love it! Particularly for sleep."

- Ken F.