SmartMiles Training Guides

Free, data-driven guides to help you understand your Garmin metrics and train smarter.

What is Garmin Body Battery? A Complete Guide

Learn what Body Battery is, how it's calculated from HRV, stress, sleep, and activity, and how to use it to make better training decisions every day.

HRV for Runners: What Your Heart Rate Variability Actually Means

Your Garmin tracks HRV every night. Here's what those numbers mean, normal ranges by age, and how to use HRV trends for training.

Understanding Your Garmin Sleep Score: What the Numbers Mean

Your sleep score is more than just hours in bed. Learn what each component means and how sleep directly impacts your running performance.

How Slow Should Your Easy Runs Be? A Data-Driven Answer

Most runners go too fast on easy days. Learn the 80/20 rule, heart rate zones, and how to use Garmin data to find your true easy pace.

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