Your watch says you need to rest, but your legs feel ready to run. Here is what recovery scores from Garmin, WHOOP and Oura actually measure – and how much influence they should have over your training.
Learn what Garmin, WHOOP and Oura recovery scores measure, why they can be misleading and when runners should change their training.
Your watch gives you a recovery score of 34.
Your legs feel fine. The weather is perfect. Your interval session has been sitting in the calendar all week, quietly waiting to ruin your morning.
Do you train – or obey the small device on your wrist?
Recovery scores have become a daily feature of modern training. Garmin calls it Training Readiness. WHOOP presents a colour-coded Recovery Score. Oura provides a Readiness Score. Each promises to turn sleep, heart-rate data and recent activity into a simple answer to a complicated question:
How ready is your body to train today?
The data can be useful. It can identify patterns, highlight poor recovery and encourage runners to take sleep more seriously.
It can also convince a perfectly healthy runner that a slightly lower heart-rate variability reading has placed their entire cardiovascular system into administration.
Your recovery score should inform your training. It should not automatically control it.
THE SHORT ANSWER
Recovery scores are most useful when viewed as trends rather than daily instructions.
A single low score does not necessarily mean you need to cancel your workout. A high score does not guarantee that you are fully recovered, free from injury or about to produce your finest interval session.
The most sensible approach combines three things:
- Your recent wearable data
- How you genuinely feel
- What your training programme is asking you to do
When all three point in the same direction, the decision is relatively easy.
When they disagree, context matters more than the colour of a circle on an app.
WHAT IS A RECOVERY SCORE?
A recovery score is an estimate of how prepared your body is to handle physical and mental stress.
Wearables collect physiological and behavioural information while you sleep and throughout the day. Their algorithms then combine selected measurements into a score, category or recommendation.
The exact calculation differs between manufacturers.
| Device | Main recovery feature | Information considered |
|---|---|---|
| Garmin | Training Readiness | Sleep score, recovery time, recent training load, HRV status, sleep history and stress history |
| WHOOP | Recovery Score | Heart-rate variability, resting heart rate, respiratory rate and sleep performance compared with your baseline |
| Oura | Readiness Score | Sleep, resting heart rate, HRV, body-temperature trends, recent activity and longer-term activity and recovery balance |
The scores may look similar, but they are not interchangeable.
A Garmin score of 70 does not necessarily represent the same physiological state as an Oura or WHOOP score of 70. Each company uses its own sensors, sampling methods, baselines and proprietary algorithm.
You are not receiving a direct measurement of “recovery”. You are receiving an estimate produced from several indirect measurements.
That distinction matters.
WHAT IS HEART-RATE VARIABILITY?
Heart-rate variability, usually shortened to HRV, is one of the most influential measurements used by recovery wearables.
Despite the name, HRV is not the number of times your heart beats each minute. It describes the variation in time between individual heartbeats.
Your heart does not beat with the exact precision of a metronome. If your heart rate is 60 beats per minute, the gap between every beat will not be exactly one second.
Those small variations are influenced by the autonomic nervous system – the system involved in regulating functions such as heart rate, breathing and digestion.
HRV is commonly used as an indirect indication of how your body is responding to training and other forms of stress.
A lower-than-usual HRV can be associated with:
- Hard training
- Poor sleep
- Psychological stress
- Alcohol
- Illness
- Travel
- Dehydration
- Inadequate recovery
However, higher is not always better.
HRV varies considerably between individuals. A value that looks low compared with another runner may be completely normal for you. What matters is how your reading compares with your own established baseline.
Unusually high HRV can also occur during certain forms of fatigue and overreaching. Research suggests that HRV should therefore be interpreted alongside other indicators of training tolerance rather than used alone.
This is not fantasy football for nervous systems. You do not need to beat your friend’s HRV score.
HOW ACCURATE ARE RECOVERY WEARABLES?
The answer depends on what the device is measuring.
Wearables can estimate overnight heart rate and HRV reasonably well under controlled conditions, although accuracy varies between devices.
A 2025 validation study compared Garmin, Oura, Polar and WHOOP devices with electrocardiogram measurements across 536 nights. Oura produced the strongest agreement for overnight resting heart rate and HRV, while WHOOP showed acceptable to moderate agreement. Garmin and Polar showed lower agreement for HRV in that particular study.
That does not prove one device will always be more accurate for every person. The study included only 13 healthy adults, devices and algorithms continue to change, and sensor performance can be affected by fit, movement and individual characteristics.
Sleep measurements need similar caution.
A study of six popular wearables found that the devices were reasonably useful for estimating when people were asleep or awake. They were considerably less accurate at identifying specific sleep stages.
Your watch may provide a useful estimate of how long you slept. Its confident announcement that you achieved precisely 74 minutes of deep sleep deserves slightly more scepticism.
Most importantly, even an accurate HRV measurement does not automatically validate the final recovery score built around it.
The raw measurement and the brand’s interpretation are two different things.
WHAT RECOVERY SCORES DO WELL
They reveal patterns
One low score may mean very little. A week of declining HRV, elevated resting heart rate and poor sleep is more useful information.
Long-term trends can help you notice the combined effect of training and life stress before it becomes impossible to ignore.
They make recovery visible
Running watches are very good at celebrating distance, pace and personal bests. Recovery scores give sleep, stress and rest a place on the same dashboard.
For runners who treat recovery as the empty space between workouts, that can be valuable.
They can identify behavioural triggers
Wearable data can make the effects of alcohol, late meals, poor sleep and excessive training easier to see.
You may already know that four hours of sleep and several drinks are not ideal preparation for a long run. Watching your resting heart rate remain elevated the following morning makes the lesson rather more difficult to negotiate with.
They provide a consistent check-in
A morning score can encourage you to pause and assess how you feel before beginning the day’s training.
The problem begins when the number replaces that assessment entirely.
WHAT RECOVERY SCORES CANNOT TELL YOU
Whether you will perform well
Training readiness and performance readiness are not the same thing.
Garmin specifically states that its Training Readiness feature is not designed to predict race performance. A poor night of sleep before an event does not guarantee a poor result.
Pre-race nerves may increase stress and reduce sleep quality while your body remains physically capable of performing well.
Whether a muscle or tendon is ready
Most recovery scores are heavily influenced by cardiovascular and nervous-system measurements.
They cannot directly assess whether your calf is becoming painful, your hamstrings are still damaged from a gym session or your Achilles tendon has started objecting to your mileage increase.
A green recovery score is not medical clearance.
Why a measurement has changed
Your wearable may detect that your resting heart rate has increased. It cannot always identify the cause.
It could be training fatigue, heat, dehydration, illness, emotional stress, alcohol, disrupted sleep or a combination of several factors.
The device detects a signal. You still need to supply the context.
Whether you are eating enough
Under-fuelling may eventually affect sleep, performance, mood and heart-rate measurements, but a recovery score cannot reliably confirm that you are meeting your energy needs.
If fatigue is persistent, consider the wider picture and look for other signs of under-fuelling in runners.
Exactly how much training you can tolerate
A score cannot fully understand your training history, current goals, injury background or the purpose of your programme.
It may recognise that your recent training load is high. It cannot always distinguish between an intentional overload week and a poorly planned collection of difficult sessions.
WHY CAN YOU FEEL GOOD WITH A LOW RECOVERY SCORE?
Several explanations are possible.
Your score may have been reduced by one poor night of sleep, a late meal, alcohol, psychological stress or a difficult workout from which you have already recovered reasonably well.
Your personal baseline may still be developing, particularly if the device is new.
The wearable may also have collected incomplete or inaccurate data because of poor sensor contact, movement during sleep or a loose strap.
A low score can be real without meaning that exercise is unsafe.
If you feel normal and the low reading is unusual, begin the planned warm-up and reassess. Your pace, perceived effort, coordination and general energy during the first ten to fifteen minutes provide additional information.
The decision does not need to be made while you are still in bed.
WHY CAN YOU FEEL TERRIBLE WITH A HIGH SCORE?
A high score does not capture every form of fatigue.
You may have:
- Localised muscular soreness
- Tendon or joint pain
- Low energy caused by inadequate food
- Psychological fatigue
- A headache or early illness
- Menstrual symptoms
- Poor motivation
- Residual fatigue not reflected in overnight HRV
You may also have slept well while remaining physically tired from a new strength workout.
If the device says you are ready but your body strongly disagrees, the answer is not to accuse your nervous system of lacking commitment.
Adjust the session.
SHOULD YOU TRAIN WITH A LOW RECOVERY SCORE?
Use the score as one part of a short decision process.
| Wearable data | How you feel | Sensible response |
| Normal score and normal wellbeing | Energetic with no unusual symptoms | Complete the planned session |
| One unusually low score | Feel normal | Warm up, reassess and train flexibly |
| Low score for several days | Tired, sore or underperforming | Reduce intensity or volume |
| Normal or high score | Unusually tired or painful | Trust the symptoms and adjust |
| Declining scores with elevated resting heart rate | Illness symptoms or extreme fatigue | Rest and consider professional advice |
| Low score before a race | Nervous but otherwise well | Do not abandon the race plan based on the score alone |
When adjusting a workout, you do not always need to choose between completing everything and doing nothing.
You could:
- Replace intervals with an easy run
- Reduce the number of repetitions
- Shorten the long run
- Remove the fast finish
- Use effort instead of target pace
- Complete mobility or light strength work
- Take a full rest day
A sensible adjustment protects the purpose of the training block. It is not a failed session.
USE THE THREE-SIGNAL CHECK
Before changing your training, consider three separate signals.
1. The data
Look beyond the headline score.
Ask:
- Is this a one-day change or a continuing trend?
- Which measurement reduced the score?
- Is resting heart rate elevated?
- Has HRV moved outside your normal range?
- Was sleep genuinely poor?
- Has training load increased sharply?
- Could the measurement be inaccurate?
2. Your subjective wellbeing
Research suggests that self-reported measures such as fatigue, sleep quality, soreness, stress and mood can be highly sensitive to changes in training load.
Ask:
- How do my legs feel?
- Am I unusually tired?
- Do I feel ill?
- Is there pain rather than normal stiffness?
- How has my running felt over the past few days?
- Am I motivated once I begin moving?
How you feel is data too. It is simply collected without a monthly subscription.
3. The training context
A low score during an intentional high-volume week may be expected.
A low score during a recovery week deserves more attention.
Consider:
- Is today’s session essential?
- Is there another day it could be completed?
- Have several hard sessions already accumulated?
- Is a race approaching?
- Would reducing the session improve the rest of the week?
Your wearable sees this morning. Your programme should see the entire training block.
CAN HRV-GUIDED TRAINING MAKE YOU FASTER?
Possibly – but the effect appears modest.
HRV-guided training involves adjusting workout intensity according to changes in HRV rather than following a completely fixed schedule.
Systematic reviews suggest that this approach may improve some physiological measurements and reduce the number of runners who respond poorly to training.
However, the effects on performance and VO₂ max have generally been small or statistically uncertain compared with predefined training.
That does not make HRV useless.
It suggests that HRV may help refine a sensible programme. It cannot rescue an unsuitable one.
You still need progressive training, appropriate intensity, adequate food, sleep and enough time to adapt.
HOW TO IMPROVE YOUR RECOVERY SCORE
The goal should be to improve recovery – not to manipulate the number.
The basics remain stubbornly effective:
- Maintain a consistent sleep schedule
- Eat enough to support your training
- Include carbohydrate around demanding sessions
- Consume adequate protein
- Rehydrate after training
- Avoid placing every hard session together
- Reduce alcohol
- Manage increases in mileage
- Include easier weeks
- Take illness seriously
- Wear the device consistently and correctly
Do not start arranging your entire life around producing the most attractive morning score.
A perfect recovery score is not the purpose of training. Adapting to training is.
Some fluctuation is normal when you are challenging your body.
WHEN RECOVERY TRACKING BECOMES UNHELPFUL
More information does not always create better decisions.
Recovery tracking may be doing more harm than good if:
- A low score makes you anxious before checking how you feel
- You cancel sessions automatically
- You constantly compare your HRV with other runners
- Sleep scores make it harder to sleep
- You ignore pain because the score is high
- You repeatedly refresh the app looking for improvement
- The device has become the final authority on your body
This behaviour is sometimes associated with “orthosomnia”—an unhealthy preoccupation with achieving perfect sleep data.
If the score consistently changes your mood, hide it for a while. You can continue wearing the device and review the trends less frequently.
The most advanced recovery tool available may occasionally be not opening the app.
WHAT ABOUT RACE MORNING?
A low recovery score on race morning can feel alarming.
Do not make a major pacing decision based entirely on one reading.
Race-day scores can be affected by:
- Pre-race nerves
- Poor sleep in an unfamiliar environment
- An early alarm
- Travel
- A late carbohydrate-rich meal
- Increased stress
- Changes to your normal routine
Review how you have felt across the week, complete your warm-up and consider any genuine symptoms.
If you feel well, the score alone should not convince you that months of training disappeared overnight.
If you feel unwell, dizzy, unusually weak or experience pain, the number is no longer the important part of the conversation.
SHOULD YOU BUY A WEARABLE FOR RECOVERY?
A wearable can be useful if you enjoy data and can interpret it without becoming controlled by it.
It may help you:
- Monitor sleep consistency
- Observe resting heart-rate and HRV trends
- Identify the effect of lifestyle choices
- Review training load
- Recognise periods of accumulating fatigue
You do not need one to recover properly.
Perceived effort, training performance, mood, appetite, soreness and sleep quality remain valuable signals.
Wearables can improve awareness. They do not replace awareness.
The same principle applies to training recommendations and AI-generated plans. Read our guide to whether you can trust coaching and running apps.
THE BOTTOM LINE
Recovery scores from Garmin, WHOOP and Oura can provide useful information about sleep, heart-rate variability, recent training and physiological stress.
They are most valuable when:
- You wear the device consistently
- It has established your personal baseline
- You examine trends rather than isolated scores
- You consider the individual measurements
- You combine the data with subjective wellbeing
- You understand the purpose of your training week
They become less useful when a single number is allowed to overrule every other signal.
Your recovery score is a conversation starter.
It is not a permission slip.
FITNESS WEARABLES FOR RECOVERY: FREQUENTLY ASKED QUESTIONS
What is considered a good recovery score?
This depends on the device and your personal baseline. Oura describes scores of 85 or higher as optimal, while WHOOP and Garmin use their own categories. The more useful question is whether your score and underlying measurements are normal for you.
Should I skip a workout if my Garmin Training Readiness is low?
Not automatically. Review why the score is low and consider how you feel. If it is a one-day change and you feel normal, begin your warm-up and reassess. Several low scores combined with fatigue, illness or declining performance provide a stronger reason to reduce training.
Why is my HRV low after a hard run?
Hard training can temporarily increase physiological stress and reduce HRV. Poor sleep, alcohol, dehydration, heat, psychological stress and illness can also contribute. Look at the pattern across several days rather than one isolated measurement.
Can a recovery score detect illness?
A wearable may identify changes associated with illness, such as elevated resting heart rate, altered HRV, increased temperature or disrupted sleep. It cannot diagnose the cause. Seek medical advice when symptoms are concerning or persistent.
Which is more accurate: Garmin, WHOOP or Oura?
Accuracy depends on the device model, measurement and individual user. A small 2025 study found that Oura produced the closest overnight HRV measurements to an ECG, followed by WHOOP, with the tested Garmin device showing lower agreement. This does not validate every feature or make one brand universally superior.
Can my recovery score be high even when I need a rest day?
Yes. A high score may not capture local muscle soreness, tendon pain, under-fuelling, psychological fatigue or every early sign of illness. Use the score alongside your symptoms and recent training.
REFERENCES
- Garmin. Understanding Garmin Training Readiness.
- WHOOP. WHOOP Recovery.
- Oura. Readiness Score. Updated July 2026.
- Miller DJ, Sargent C, Roach GD, et al. Validation of nocturnal resting heart rate and heart rate variability in consumer wearables. 2025.
- Chinoy ED, Cuellar JA, Huwa KE, et al. A validation of six wearable devices for estimating sleep, heart rate and heart-rate variability in healthy adults. Sensors. 2022.
- Miller DJ, Sargent C, Roach GD, et al. Wrist-based photoplethysmography assessment of heart rate and heart-rate variability: validation of WHOOP. Sensors. 2021.
- Medellín Ruiz JP, Rubio-Arias JÁ, Clemente-Suárez VJ, Ramos-Campo DJ. Heart-rate-variability-guided training for enhancing aerobic fitness and endurance performance: a systematic review with meta-analysis. 2021.
- Düking P, Zinner C, Trabelsi K, et al. Monitoring and adapting endurance training on the basis of heart-rate variability monitored by wearable technologies: a systematic review with meta-analysis. Journal of Science and Medicine in Sport. 2021.
- Bellenger CR, Fuller JT, Thomson RL, Davison K, Robertson EY, Buckley JD. Monitoring athletic training status through autonomic heart-rate regulation: a systematic review and meta-analysis. Sports Medicine. 2016.
- Saw AE, Main LC, Gastin PB. Monitoring the athlete training response: subjective self-reported measures trump commonly used objective measures. British Journal of Sports Medicine. 2016.
DISCLAIMER
This article is for general educational purposes and does not replace personalised medical, coaching or physiological advice. Consumer wearables cannot diagnose illness, injury or overtraining. Seek advice from a qualified healthcare professional if you experience chest pain, dizziness, fainting, breathing difficulty, persistent fatigue, recurrent illness or unexplained changes in performance.
