← Back to Garmin School

Health, sleep & recovery

Understand Garmin HRV, sleep, stress, Body Battery, heart rate, recovery signals, and other health metrics.

Should You Trust Garmin's Training Readiness Score?Day 1181

Should You Trust Garmin's Training Readiness Score?

Training Readiness is a 1–100 score built from six different inputs. Here's what each one contributes, what the score genuinely can't see, and the one rule that makes it useful instead of stressful.

Read more
Alcohol Doesn't Just Cost You Tonight's Sleep — It Costs You Training DaysDay 11318

Alcohol Doesn't Just Cost You Tonight's Sleep — It Costs You Training Days

A night of drinking can suppress HRV, spike resting heart rate, and drain Body Battery — and if you're mid training block, that recovery hit can cost you more than just tomorrow.

Read more
Set a Heart Rate Alert So Your Garmin Watches Your Zone 2 Run For YouDay 11122

Set a Heart Rate Alert So Your Garmin Watches Your Zone 2 Run For You

Most runners stare at their screen the whole run trying to stay in Zone 2. Set a heart rate alert instead and your Garmin buzzes the moment you drift out.

Read more
Is Your VO2max Stuck? Analyse Your Garmin Data With Claude AIDay 100875

Is Your VO2max Stuck? Analyse Your Garmin Data With Claude AI

Training multiple times a week but your VO2max won't budge? Export your Garmin data and let Claude AI dig through your training, sleep, and recovery to pinpoint exactly what's holding it back.

Read more
Garmin VO2max Explained — and How to Actually Improve ItDay 98223

Garmin VO2max Explained — and How to Actually Improve It

What your Garmin's VO2max number really means, how the watch estimates it, and a practical cheat sheet of training, recovery, and lifestyle changes that move it up.

Read more
How to Set Drink Alerts on a Garmin WatchDay 9527

How to Set Drink Alerts on a Garmin Watch

Create a recurring time- or distance-based Drink alert inside an activity profile so your Garmin reminds you to hydrate during longer sessions.

Read more
Why Alcohol Can Lower Your Garmin HRVDay 9217

Why Alcohol Can Lower Your Garmin HRV

Alcohol can raise overnight heart rate and suppress HRV, so the effect may show up in Garmin recovery metrics before you fully feel it the next morning.

Read more
Garmin Active vs Resting Calories ExplainedDay 9129

Garmin Active vs Resting Calories Explained

Active calories cover movement beyond rest, while resting calories estimate the energy your body uses throughout the day. Together they form Garmin's total calories.

Read more
Track Hydration on Your Garmin Watchface With Hydration PRODay 9052

Track Hydration on Your Garmin Watchface With Hydration PRO

Garmin can remind you to drink, but Hydration PRO can also share your daily progress with compatible watchfaces such as Goals 8.

Read more
Analyse Your Garmin Sleep Data With ClaudeDay 89952

Analyse Your Garmin Sleep Data With Claude

Export your Garmin history and let Claude compare sleep, HRV, stress, and activity trends to find personal patterns instead of giving generic sleep advice.

Read more
What a Sudden HRV Drop on Garmin Can Tell YouDay 8323

What a Sudden HRV Drop on Garmin Can Tell You

HRV is not a number to compare with friends. It is a trend against your own baseline, and a sudden drop can warn you that stress, illness, or recovery debt is building.

Read more
How to Show Garmin Watch Heart Rate on an Edge Bike ComputerDay 809

How to Show Garmin Watch Heart Rate on an Edge Bike Computer

You can use many Garmin watches as a heart rate sensor for your Edge bike computer. Here's how to broadcast wrist heart rate, pair it to the Edge, and ride with your heart rate on the handlebar screen.

Read more
How to Track Your Glucose Levels on Your Garmin WatchDay 77150

How to Track Your Glucose Levels on Your Garmin Watch

If you have diabetes and a Garmin, the CGM Connect app lets you see your glucose readings right on your wrist — including trend arrows, a graph, and watchface integration.

Read more
Your Garmin Can Predict Illness Days Before You Feel ItDay 7457

Your Garmin Can Predict Illness Days Before You Feel It

HRV often drops before symptoms appear. Your body is already fighting something — your watch can see it. Here's how to read the signs and what to do when you spot them.

Read more
Claude AI Can Build Your Training Schedule From Your Actual Garmin DataDay 711242

Claude AI Can Build Your Training Schedule From Your Actual Garmin Data

Export your Garmin data, describe your goal, and let Claude analyse YOUR numbers to create a personalised training plan — not a generic template. Here's the exact 3-step process.

Read more
Apple Watch vs Garmin: Which One Actually Tracks Sleep Better?Day 7028

Apple Watch vs Garmin: Which One Actually Tracks Sleep Better?

Scientific studies compared both against polysomnography — the gold-standard sleep lab test. Here's what the research says, and why Garmin still wins in the real world.

Read more
Silent Wake: Wake Up Without Disturbing AnyoneDay 6371

Silent Wake: Wake Up Without Disturbing Anyone

Sleeping next to someone with a different wake time? Your Garmin can wake you with vibration only — no sound. Here's how to enable silent alarms.

Read more
Can You Hit a 90+ Sleep Score Every Night With Claude AI and Your Garmin?Day 623116

Can You Hit a 90+ Sleep Score Every Night With Claude AI and Your Garmin?

Yes — and here's how. Export your Garmin data, run this prompt through Claude Code or Claude Cowork, and get a personalised 30-day plan to consistently hit 90+ sleep scores, built from your actual data.

Read more
What Is Pulse Ox on Your Garmin — and What Does It Tell You?Day 5744

What Is Pulse Ox on Your Garmin — and What Does It Tell You?

Your Garmin tracks blood oxygen saturation. Here's what a normal reading looks like, what a low one means, and why you should have it on during sleep.

Read more
Top 5 Garmin Features You Didn't Know ExistedDay 56123

Top 5 Garmin Features You Didn't Know Existed

Your Garmin is packed with features most people never find. Here are the 5 best ones — from smart alarms to incident detection — and how to turn them on.

Read more
Can You Optimise Your VO2max in One Month With Claude AI and Your Garmin?Day 542120

Can You Optimise Your VO2max in One Month With Claude AI and Your Garmin?

Yes — and here's how. Export your Garmin data, run this prompt through Claude Code or Claude Cowork, and get a personalised 4-week VO2max plan built from your actual numbers.

Read more
How Garmin's Stress Tracking Actually Works — And Why It's More Accurate Than You ThinkDay 5258

How Garmin's Stress Tracking Actually Works — And Why It's More Accurate Than You Think

Garmin uses HRV to calculate stress all day long. Here's the science behind it, what the numbers mean, and how to actually use your stress score before a workout.

Read more
Why Garmin Says You're Unproductive Right After Your Best Race EverDay 4937

Why Garmin Says You're Unproductive Right After Your Best Race Ever

Seeing "Unproductive" after a great race is confusing — until you understand what Garmin is actually measuring. It's not judging your effort, it's reading your body's ability to absorb more stress.

Read more
Resting Heart Rate: What It Is and How to Read ItDay 4558

Resting Heart Rate: What It Is and How to Read It

Your Garmin measures your resting heart rate every night while you sleep. Here's what the number actually means, what's normal, and when to pay attention.

Read more
What Is Garmin's Body Battery — And How Does It Work?Day 4142

What Is Garmin's Body Battery — And How Does It Work?

Body Battery is Garmin's estimate of how much energy you have left. Here's what it actually measures, how it goes up and down, and how to use it to train smarter.

Read more
Apple Watch vs Garmin: Which Heart Rate Is More Accurate?Day 3913

Apple Watch vs Garmin: Which Heart Rate Is More Accurate?

I wore both during a walk to find out. The answer isn't what you'd expect — and the real difference isn't accuracy, it's frequency.

Read more
Replace Your Personal Trainer With Claude AI — Using Your Garmin DataDay 382669

Replace Your Personal Trainer With Claude AI — Using Your Garmin Data

I exported my Garmin data, fed it to Claude, and got a personalised marathon training plan based on MY actual numbers. Here's the exact step-by-step — including the prompt.

Read more
Wind Down With Breathing: Garmin Breathwork vs MoonbirdDay 3711

Wind Down With Breathing: Garmin Breathwork vs Moonbird

Controlled breathing is one of the most effective tools for winding down before sleep. Here's a detailed breakdown of how to do it with your Garmin watch — and whether Moonbird is worth the extra $180.

Read more
What Is HRV — And How Should You Use It?Day 3633

What Is HRV — And How Should You Use It?

HRV stands for Heart Rate Variability — the tiny changes in time between each heartbeat. Your Garmin tracks it every night. Here's what it means and why the trend matters more than the number.

Read more
The Garmin Move Bar: How It Works and Why You Should Use ItDay 3132

The Garmin Move Bar: How It Works and Why You Should Use It

The Move Bar appears after 1 hour of inactivity and fills further every 15 minutes. It resets when you move. Here's why this simple feature is more powerful than it looks.

Read more
Lactate Threshold: The Running Metric That Changes EverythingDay 2556

Lactate Threshold: The Running Metric That Changes Everything

Your lactate threshold is the pace where your body can no longer clear lactic acid fast enough. Training around it is one of the most effective ways to get faster.

Read more
VO2 Max: What Your Garmin Number Actually MeansDay 1838

VO2 Max: What Your Garmin Number Actually Means

VO2 Max measures how efficiently your body uses oxygen during exercise. It's the single best predictor of endurance fitness — and your Garmin estimates it from every run.

Read more
Why Your Garmin Shows a Heartbeat When You're Not Wearing ItDay 1719

Why Your Garmin Shows a Heartbeat When You're Not Wearing It

Put your Garmin on a table and it still shows a heart rate. It's not broken — it's how the optical sensor works. Here's the actual physics behind it.

Read more
Intensity Minutes: What Is That Symbol on Your Garmin?Day 1327

Intensity Minutes: What Is That Symbol on Your Garmin?

That lightning bolt icon tracks Intensity Minutes — a scientifically-backed health metric that matters more than step count. Here's what it means and how to hit your goal.

Read more
Heart Rate Alerts: Stop Staring at Your Watch Mid-RunDay 1141

Heart Rate Alerts: Stop Staring at Your Watch Mid-Run

Set heart rate alerts on your Garmin and it buzzes when you go above or below your target zone — so you can run by feel, not by screen.

Read more
Stride II: The Watchface That Might Save Your LifeDay 1029

Stride II: The Watchface That Might Save Your Life

The evolution of Stride — Stride II adds more data, smoother visuals, and the same hourly step motivation system that started this whole journey.

Read more
Why Garmin Doesn't Default to 10,000 StepsDay 731

Why Garmin Doesn't Default to 10,000 Steps

Garmin's step goal auto-adjusts to your actual fitness level instead of defaulting to 10,000. Here's the science behind it — and how to change it manually.

Read more
Can Your Garmin Predict You'll Be Sick?Day 672

Can Your Garmin Predict You'll Be Sick?

HRV — Heart Rate Variability — drops before you feel sick. Your Garmin tracks this daily, giving you a 1–2 day early warning to rest instead of train.

Read more
Stride: The Watchface My Doctor InspiredDay 1108

Stride: The Watchface My Doctor Inspired

A high blood pressure diagnosis led to building Stride — a Garmin watchface that motivates hourly movement through the day.

Read more