Intero Performance · Operational Stress Reactivity Profile

Find out what pressure actually does to you.

The OSRP is not a personality quiz. It is a sequential protocol that puts your nervous system and your thinking under accumulating load — then measures what happens. Five capacities come out the other side. All of them yours, against your own baseline.

Free to take · 25–35 minutes · Requires a Polar H10 or a Bluetooth heart-rate monitor that reads R-R intervals

Nervous system mapPosterior view
Human nervous system, posterior view
Central + peripheral nervous system
Full system
Five capacities. One nervous system. Hover a capacity to trace its pathway.
OSRP
01ELT
Emotional Load Tolerance
Amygdala · brainstem · cardiac vagal tone
02SRS
Self-Regulation Stability
Prefrontal · insula · brainstem · diaphragm
03CE
Cognitive Endurance
Prefrontal cortex · cortical load
04CP
Convergent Persistence
Prefrontal · spinal drive · periphery
05NSR
Nervous System Recovery
Vagus · respiration · enteric

Hover a capacity to light its pathway. All five come from one sitting, read through a chest strap against your own baseline.

6
Sequential stages
5
Capacities measured
1
Sitting, start to finish
0
Normative rankings

What we measure

Performance isn't one thing. It's five.

Five capacities decide how a person carries load. They aren't five tests — they're five readings of the same thing: the margin between what's on you and what you've got left to carry it with. One sitting, one stream of data, read five ways: threshold, slope, spread, time, recovery. Every read is against your own baseline — no percentiles, no comparison to a population.

01
ELT
Threshold

Emotional Load Tolerance

How much weight you can carry before it starts changing your decisions. Measured from your heart data — not from what you say about yourself.

Predicts

How accurate you stay in high-stakes human moments: the call, the room, the family. Low tolerance shows up as decisions made from activation instead of read.

Source · HRV across 48 forced-choice scenario items
Emotional Load Tolerance pathway on the nervous-system map
ELT pathway
02
SRS
Spread

Self-Regulation Stability

How steady you hold — not how high you peak. Measured while you answer questions about who you are: stability under self-reflection is its own kind of load.

Predicts

How long you stay deliberate before you start reacting — and whether your own internal noise costs you more than the environment does.

Source · HRV stability across the 60-item trait block
Self-Regulation Stability pathway on the nervous-system map
SRS pathway
03
CE
Slope

Cognitive Endurance

How long your thinking holds up under sustained load. Ten timed prompts trace the fall-off directly — the slope, not the snapshot.

Predicts

The hour in the shift where your judgment starts costing you — and how much runway you have before you should be handing decisions off.

Source · 10 divergent prompts, 90 seconds each
Cognitive Endurance pathway on the nervous-system map
CE pathway
04
CP
Time under load

Convergent Persistence

What happens when it all stacks at once — whether you keep solving when the problems get hard and the clock keeps running. Acceleration or fade, measured item by item.

Predicts

Whether you close under time pressure or hand things off half-finished. Persistence is a separate capacity from capability.

Source · 76 convergent items, 10 minutes, hard stop
Convergent Persistence pathway on the nervous-system map
CP pathway
05
NSR
Recovery

Nervous System Recovery

How fast, and how completely, you come back when the load lifts. Recovery is trainable — this is the number the work moves first.

Predicts

How much of tomorrow you get back. Slow return is the earliest signal that tolerance is thinning, months before performance drops.

Source · recovery-breathing HRV vs your own session baseline
Nervous System Recovery pathway on the nervous-system map
NSR pathway

Five capacities. One read. Against your own normal — never against a stranger.

How we measure it

Six stages. The load accumulates by design.

The order matters. You settle first, then the protocol stacks emotional, self-reflective, and cognitive load in sequence — and finishes by measuring how far back your system comes.

01
Anchoring breath
Guided breathing to settle the system and establish your own baseline. Not a performance — just the reference point everything else is measured against.
02
Forced-choice scenarios
48 items across leadership, moral gray areas, identity, failure, and decision-under-pressure. No neutral option is offered.
03
Trait self-report
60 quick statements on a 5-point scale. Steady load, sustained — stability here is its own read.
04
Divergent cognitive task
10 prompts, 90 seconds each. Traces how fast your cognitive resources deplete as load stacks.
05
Convergent reasoning
76 items in 10 minutes, hard stop. Decision speed and persistence, item by item.
06
Recovery breathing
A few minutes to let the system come back — and to measure how far back it comes.
What you need

25–35 uninterrupted minutes, a quiet room, Chrome or Edge on a computer, and a Polar H10 — or any Bluetooth heart-rate monitor that transmits R-R intervals. R-R is the beat-to-beat timing, not the pulse number on the screen: plenty of monitors broadcast heart rate and never send it. Pairing checks for R-R before you begin and tells you if yours isn't sending any. Put the strap on 5–10 minutes ahead so the contact settles — the timer doesn't pause once you start.

Why R-R, and why we insist

The whole point is a look inside. Three of the five capacities are read from the changing gap between one heartbeat and the next — without those intervals there is no threshold, no spread, no recovery, and about sixty percent of the profile disappears. So we don't run it without them. The Polar H10 is what we build and test against.

What you get

Your baseline. Not theirs.

Your five-capacity signature
Charted, with every number explained in plain language and read against your own session — never a percentile.
Your load timeline
The whole session end to end: baseline, trough under provocation, recovery. Where the system moved, and when.
A written analysis
What your profile means for how you perform when it counts — including read-throughs to the role you're in and the one you're after.
A report you keep
A PDF you can take with you, plus the option to debrief the whole thing with an Intero practitioner.

The demand side

Map My Environment

The battery reads what you have. This reads what your world asks of you. Twelve questions answered against written anchors — about five minutes, no strap — and your environment comes back as an IDC profile (Intensity · Diversity · Complexity) and a demand level on each of the five capacities. It stands on its own. Take the OSRP too and the two halves join.

Your environment's IDC profile
Intensity

How hard the peak load gets — consequence, scrutiny, the length of the grind.

RedoableLives turn on it
Diversity

How varied the demands are — context switching, interruption, no two days alike.

One kind of workConstant change
Complexity

How many interacting variables and decisions — including the ones with no clean answer.

Answers are knowableTwo defensible wrongs

The same three dials our instructors use to design a live training event — pointed at your actual week instead.

Demand, capacity by capacity
ELT
Emotional Load Tolerance

Loaded by consequence weight, moral load, high-stakes human outcomes.

SRS
Self-Regulation Stability

Loaded by scrutiny, composure held while being watched or judged.

CE
Cognitive Endurance

Loaded by decision volume, sustained thinking, fragmented attention.

CP
Convergent Persistence

Loaded by everything stacking at once, hard problems under a running clock.

NSR
Nervous System Recovery

Loaded by thin recovery windows, load that follows you home.

Where the two halves meet

For each capacity: how hard your environment leans on it, against how much that capacity cost you under load in your session. Nine outcomes, three names. The thresholds behind every cell are printed on your own read — we don't hide the arithmetic.

Demand ↓ / Your read →
Held
Real cost
Heavy cost
Light demand
margin
margin
watch
Moderate demand
margin
watch
friction
Heavy demand
margin
friction
friction

Margin is the environment asking hard and the capacity answering. Watch is demand and cost sitting close — fine today, first to move when the week gets worse. Friction is your world leaning hardest exactly where your session showed the most cost. That is not a verdict on you. It is the clearest place for the work to start.

Yours alone

Your environment profile is private to your account. It is never shown to an employer, never used to rank anyone, and never an input to any employment decision. Save it again in 30, 60, or 90 days and you can watch the environment change alongside the capacities — every read against your own history, never against a stranger.

Where to start

No strap and no battery needed to map your environment — do that today and you already know which capacities your world leans on. The OSRP is what turns that into the fit.

Regulated isn't calm. It's accuracy.

One assessment. All five capacities. A starting point that's yours and nobody else's — take it seriously once and you have a baseline you can actually train against.

Free · Results the moment you finish · Polar H10 or an R-R–capable Bluetooth monitor required