Guides
Plain-English guides for heart-rate zones, HRV, GPS accuracy, running power, race-day setup, and recovery metrics.
New to training by the numbers? Start with heart-rate zones, because many watch metrics, from training load to effort scores, are built on heart rate. HRV and recovery metrics explain the recovery and readiness scores you see each morning, and the troubleshooting guides work through COROS, Garmin and WHOOP problems one symptom at a time. Race-week guides cover the taper, pacing a hilly course and setting up your watch for race day.
Training Guide
How elite and recreational runners split easy, moderate and hard running, what the trials and 2025 meta-analyses found, and why time-in-zone charts undercount hard days.
Training Guide
How perceived effort tracks training load and steers pace, when it beats pace or heart rate, when it misleads, and how to train by feel with a Garmin, Apple Watch, Polar, COROS or Strava.
Watch Troubleshooting
AirPods dropping from your iPhone when a Garmin connects, music from the watch going silent or stuttering, and restarts with headphones connected, with Garmin's statements and owner counts.
Watch Troubleshooting
Watches failing after updates, dead dials, battery drain, charging, sync, Strava, GPS, and heart rate, with COROS's own fixes and counts of owner reports.
Band Troubleshooting
Early-run highs, cadence lock, and Bicep Band spikes, what WHOOP changed in 2026, and the fixes from WHOOP's staff and owners.
Setup Guide
As of October 2026: chest straps, Garmin heart rate, the Strava, Apple Health, and Health Connect routes, and heart-rate broadcast.
Setup Guide
Why HRV, Recovery, zones, and load disagree between the two, which number to use for what, and a setup for runners.
Band Troubleshooting
Max heart rate, the 0 to 21 scale, 5.0 vs 4.0, the July 2026 update, and how Strain differs from Garmin's training load.
Setup Guide
Which device should be primary, how to avoid duplicate runs, heart-rate broadcast to a watch, and why HRV Status and Home tiles can disagree.
Band Troubleshooting
Why Cirqa workouts go missing, broadcast drops, tracking that stalls after charging, firmware 4.20, pairing, and Garmin's reset steps.
Health & Training Guide
How to use the neck rule carefully, spot red flags, read wearable context, and return without stacking missed workouts.
Race-Week Guide
A signal-versus-noise framework for heavy legs, new aches, restless energy, taper anxiety, and red flags.
Training Guide
How to confirm a real plateau, find the likely limiter, choose one change, and retest after a steady block.
Race-Week Guide
How to preserve a familiar lifting routine while removing the volume, novelty, and fatigue that can compromise race day.
Race Guide
How to control effort on climbs, run the crest, descend safely, and build a flexible finish-time plan.
Watch Troubleshooting
What to do before a firmware update, what the “connect to PC” screen means, and how to respond if a COROS watch freezes or will not start.
Recovery Guide
A practical guide to post-marathon fatigue, recovery signals, red flags, and a conservative return-to-running progression.
Training Guide
A practical readiness checklist for adding weekly running volume, including recovery signals, wearable trends, long-run progression, and red flags.
Training Guide
How long you can run and stay in Zone 5, why your watch shows it on easy runs, and how to use hard sessions without wrecking your week.
Training Basics
How to set zones from max heart rate, heart-rate reserve or threshold, what Zone 2 really means, and how each watch brand sets zones.
Recovery Basics
Why single readings mislead, how to read the weekly trend, what moves HRV, and what HRV-guided training trials in runners found.
Buying Advice
Form factor, sensors, battery, three-year cost, what works without a subscription, app compatibility and return windows, checked brand by brand.
Training Guide
How each brand estimates running power, why the numbers don't match, what studies show about accuracy, and where power helps on hills.
Recovery Guide
What goes into each brand's readiness score, how accurate HRV, resting heart rate and sleep tracking are, and how to act on the numbers.
Race Guide
Race-week watch setup, start-line steps, pacing from big-race data, and why your GPS distance won't match the course.
Buyer Guide
Foam rollers, massage guns, compression boots, ice baths and wearables, ranked by what the research shows and what they cost.