This one drives me crazy.
Wake up.
Watch says red.
HRV is down.
Recovery score is 42.
And now the day feels ruined before breakfast.
I do not think that is a good way to use recovery data.
One bad score is information
That is where I start.
Information.
Maybe you slept badly.
Maybe yesterday's session was much harder than normal.
Maybe you drank.
Maybe the wearable got a noisy reading.
Maybe you are actually carrying fatigue that deserves some attention.
We do not know yet.
So I would not jump straight from "score is low" to "cancel the workout."
The warm-up gets a vote
This is one of the cheapest pieces of useful information you have.
Go warm up.
If the empty bar feels normal, the first few sets move normally, and nothing else looks concerning, that tells me something.
If the warm-up feels awful, that tells me something too.
I have had days where a weight that should be automatic feels strangely heavy.
You know it when it happens.
That is a lot more useful than pretending the morning score and the workout live in separate universes.
What are you supposed to train today?
This matters more than people give it credit for.
Say your legs feel a little beat up.
Today's session is upper body with some moderate accessory work.
I may not care much.
Now make today's session max-effort deadlift.
Different answer.
Readiness is always readiness for something.
That is why I do not like one recovery score acting like your entire body has one battery.
When I would probably train as planned
One low score.
No concerning symptoms.
Sleep was decent enough.
Recent workload has not gone crazy.
Warm-up feels normal.
Performance has been fine.
I am probably training.
I may keep a little closer eye on the session, but I do not need to create a problem that is not there.
When I start taking volume away
Now the low score has been hanging around.
Sleep is bad.
Resting heart rate is off.
Workload jumped.
The warm-up feels wrong.
And the last two workouts already underperformed.
Okay.
I do not need another test.
Maybe we keep some intensity but cut accessory work.
Maybe the run stays easy instead of becoming threshold.
Maybe the main lift stays, but the planned volume comes down.
The adjustment should match the problem.
A full rest day is not the only adjustment
Recovery advice gets weirdly binary.
Train normally or lie on the couch.
There is a lot of room in between.
Reduce sets.
Leave another rep in reserve.
Swap a hard run for easy mileage.
Keep upper body and back off lower body.
Shorten the session.
Sometimes that is all the athlete needed.
How I want Mass in Motion making the call
I do not want HRV deciding the workout by itself.
I do not want sleep deciding it by itself either.
Recent workload, recovery trends, performance, the kind of fatigue you are carrying, and the actual session coming next all belong in the picture.
Then the adjustment stays deterministic.
Same inputs. Same rules. Explainable decision.
If you want the HRV side broken down, read What Is a Good HRV for Athletes?. If the issue is accumulated training fatigue rather than one rough morning, read Deload Weeks.