What Body Battery means
Body Battery is a concept used by wearable devices to estimate how much physical and mental energy your body currently has available.
Higher values usually indicate that your body is well rested and recovered.
How Body Battery is calculated
Wearables typically combine several signals to estimate Body Battery levels.
- Heart rate variability (HRV)
- Stress levels
- Sleep quality
- Daily activity and training load
See the Body Battery Chart.
How to interpret Body Battery values
High values may indicate strong recovery and readiness for activity, while low values can reflect accumulated stress or fatigue.
Learn more about recovery metrics.
What the Value Means in Practice
The meaning of Body Battery always depends on context. A good value is not simply “high” or “low,” but appropriate for your situation.
How to Interpret the Value
Useful questions include:
- What does the trend look like across several days?
- Does the value fit your sleep and recovery data?
- Was there stress, alcohol, illness or hard training?
- Is the value far from your personal baseline?
Useful Internal Links
Recommended RECOVERY Trackers
Understand Your Health Data
LongLife Scan analyzes wearable health data and helps you understand patterns in stress, sleep and recovery.
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Health Metrics
Overview of wearable health metrics including HRV, VO2max, sleep and recovery.
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Related Charts
Body Battery Chart
Body Battery charts show how wearable devices estimate energy, recovery and stress patterns during the day.
View Chart →
HRV Chart – Typical Heart Rate Variability Ranges
HRV trends show recovery and stress patterns over time.
View Chart →
Recovery Score Chart
Recovery score charts show how wearables combine HRV, sleep and stress signals into one readiness value.
View Chart →
Sleep Score Chart – Sleep Quality Explained
Sleep score charts show typical score ranges and help interpret wearable sleep quality estimates.
View Chart →
Sleep Efficiency Chart
Sleep efficiency charts show how much of your time in bed is spent sleeping and help interpret sleep continuity.
View Chart →
Sleep Stages Chart
Sleep stages charts show how sleep cycles are distributed between light sleep, deep sleep and REM sleep.
View Chart →