What Is Strain Tracking?
Strain tracking measures the physical and mental load your body accumulates throughout the day. It takes into account factors like workout intensity, duration, heart rate zones, and even everyday stress. The goal is to give you a number that reflects how hard your body has been working — so you know how much recovery it needs.
Think of strain and recovery as two sides of the same coin. Strain is what you put in; recovery is what you get back. Managing the balance between the two is the foundation of sustainable performance — whether you're an athlete or simply someone who wants more energy day to day.
How Recovery Is Measured
Recovery isn't just about sleep hours. Modern wearable devices assess recovery through a combination of signals:
- Heart Rate Variability (HRV) — the variation in time between heartbeats, which reflects how well your autonomic nervous system has recovered.
- Resting Heart Rate — a rising resting heart rate often signals incomplete recovery or oncoming illness.
- Sleep Quality — the proportion of deep and REM sleep you achieved, not just total hours.
- SpO2 (Blood Oxygen) — oxygen saturation during sleep, which affects overnight restoration.
Why the Balance Matters
Consistently high strain with low recovery is a recipe for burnout, injury, and declining performance. On the other hand, too little strain means you're not providing your body with the stimulus it needs to adapt and improve.
Tracking both gives you the feedback loop to find your personal sweet spot — pushing hard when you're ready, easing off when you need it.
How to Use Recovery Scores Day to Day
A good recovery tracker will consolidate these signals into a simple daily score or readiness rating. Here's a practical way to act on it:
- High recovery score: Green light to train hard, take on a challenging workout, or tackle a demanding workday.
- Moderate score: Opt for moderate effort — a steady-state run, yoga, or a lighter session.
- Low score: Prioritise rest, mobility work, or an easy walk. Pushing through consistently low recovery scores leads to diminishing returns.
Common Mistakes in Recovery Tracking
Checking one day in isolation. Trends matter more than any single data point. Look at your HRV and resting heart rate over 7–14 days to spot patterns.
Ignoring subjective feel. Data is a guide, not a rule. If your score says you're recovered but you feel terrible, trust your body.
Inconsistent wear. Tracking only on some nights produces incomplete data. Consistent, nightly wear gives you a reliable baseline.
Start Tracking with the EHG Smart Band
The EHG Smart Band tracks your heart rate continuously, monitors sleep stages, and measures SpO2 overnight — giving you the core data points you need to understand your recovery patterns. Wear it consistently and you'll quickly build a personal baseline that makes every day's data more meaningful.