What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINC

LOINC Code 66211-4: Treadmill speed during warm up [PhenX]

Name: LOINC Code 66211-4: Treadmill speed during warm up [PhenX]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:45.459Z

66211-4 is a LOINC code used to identify Treadmill speed during warm up [PhenX] in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Treadmill speed during warm up. It is commonly used with the system or sample type ^Patient.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Treadmill speed during warm up. It is commonly used with the system or sample type ^Patient.

When is it used?

Used in lab systems, EHRs, and clinical data exchange.
May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
Status: TRIAL
Method: PhenX

What it does not mean

The code identifies the observation or test, not the actual result.

Key facts

Treadmill speed during warm up [PhenX]
Treadmill speed during warm up
Study participants warm up by walking on a treadmill at 0% grade , but comfortable pace of 2-4.5 mph for 4 minutes. The warm up pace should produce a heart rate that is 50-70% of the age-predicted heart rate (220-age in years). After 4 minutes of 0% grade, begin the test.
Count/time; nRate; Number rate; Number Rate = Count/Time; Point in time; QNT; Quan; Quant; Quantitative; Random

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

Treadmill speed during warm up [PhenX]Treadmill speed nRate PhenXTreadmill speed during warm upPHENXNRatPt^Patient

Frequently asked questions

Code details

Code66211-4

SystemLOINC

Display nameTreadmill speed during warm up [PhenX]

DescriptionTreadmill speed during warm up

Short nameTreadmill speed nRate PhenX

ComponentTreadmill speed during warm up

PropertyNRat

TimingPt

System (specimen)^Patient

ScaleQn

MethodPhenX

ClassPHENX

Example unitsmph

StatusTRIAL

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.38

Last changed2.65

Part names

Treadmill speed during warm upNRatPt^PatientQnPhenXNumber RatePoint in time (spot)

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.