Garmin Forerunner 255 Training Features
A capable mid-range running watch with Training Load and HRV Status. Missing Training Readiness — the one metric that ties everything together.
Training Intelligence Features
Training Readiness
A daily score (0-100) combining HRV, sleep, recovery, and recent training load to tell you how prepared your body is to train.
The Forerunner 255 does not support this feature. Should I Train can help fill this gap using your other available metrics.
Learn more about Training ReadinessBody Battery
A real-time energy gauge (0-100) that tracks how your body charges through rest and drains through activity and stress.
Your Forerunner 255 tracks this.
Learn more about Body BatteryHRV Status
A 7-day rolling analysis of your heart rate variability during sleep, showing whether your autonomic nervous system is balanced, low, or improving.
Your Forerunner 255 tracks this.
Learn more about HRV StatusTraining Load / Status
Tracks your cumulative training load over 7 and 28 days and categorizes your training as Productive, Maintaining, Detraining, Overreaching, or Unproductive.
Your Forerunner 255 tracks this.
Learn more about Training Load / StatusRecovery Time
An estimate of how many hours your body needs before you are ready for another hard workout, updated after each activity.
Your Forerunner 255 tracks this.
Learn more about Recovery TimeSleep Score
A nightly score (0-100) based on sleep duration, quality, deep sleep, REM, restlessness, and overnight HRV.
Your Forerunner 255 tracks this.
Learn more about Sleep ScoreVO2 Max
An estimate of your maximum oxygen uptake — the gold standard metric for aerobic fitness. Updated after qualifying runs or rides.
Your Forerunner 255 tracks this.
Learn more about VO2 MaxWhat Your Forerunner 255 Is Missing
- \u2717Training Readiness
This is where AI coaching fills the gap. Should I Train analyzes your available Garmin data and gives you a daily training recommendation, even without Training Readiness.
Get AI Coaching for Your Forerunner 255
Your watch collects powerful data. Let AI build the complete picture and guide your training.
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