
What Is the 80% Rule in Running? (80/20 Running for Garmin Users)
The 80% rule (or 80/20 running) means 80% of your runs should be easy and 20% hard. A practical guide for Garmin users.
Straightforward answers to the most common questions about training, nutrition, and recovery. No fluff, just what works.

The 80% rule (or 80/20 running) means 80% of your runs should be easy and 20% hard. A practical guide for Garmin users.

Learn how to breathe efficiently while running, when to use nose vs mouth breathing, and how breathing affects performance and heart rate.

Running cadence is often misunderstood-learn what it is, how it affects efficiency and injury risk, and whether you should try to change yours.

Strength training isn’t just for bodybuilders-here’s what the science says about lifting weights as a runner.

Simple, practical guidance on what to eat before a run to improve energy, comfort, and training quality.

What to eat after a run to recover faster, support adaptation, and prepare for your next session.

Why music improves running performance, motivation, and pacing - and how BPM-based playlists can guide your effort.

Most supplements don’t help—but a small number have strong scientific evidence for improving running performance or training quality.

VO₂ max is one of the most talked-about metrics in running—here’s what it actually means, why it matters, and how Garmin estimates it.

Running in the heat slows you down—here's why it happens, how much pace you can expect to lose, and how to adjust training safely.

Running at altitude feels harder for a reason—learn how reduced oxygen impacts pace, heart rate, and performance, and how to adjust training.

Understanding the difference between how fast a run feels and how fast it actually is—and why both matter for smarter training.

A simple pacing framework that helps marathon runners avoid early mistakes and finish stronger.

A simple, flexible approach that helps runners build consistency, manage effort, and avoid burnout.

Your first mile is one of the hardest milestones in running — not because of fitness, but because of how your body and brain adapt.

The science-backed training approach behind Norway’s endurance success, built on controlled intensity and double threshold sessions.

Running shoes don’t fail overnight—here’s how mileage, wear patterns, and feel determine when it’s time to replace them.

Walking—especially in the morning—can support recovery, aerobic fitness, and consistency. Here’s what the research says.

Creatine may influence brain energy and mood—here’s how its cognitive and psychological effects could matter for runners.

Creatine isn’t just for lifters—here’s what the science says about its role in sprinting, distance running, and marathon performance.

Recovery determines how well training translates into performance. Here’s what the science actually supports—and what matters most.

How to combine strength training and running without sacrificing performance—plus how to balance intensity, recovery, and long-term progress.

Obstacle course racing demands more than aerobic fitness. Learn how to train for grip strength, carries, climbs, and running under fatigue.