Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
running duration
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "running duration" is correct and usable in written English.
It can be used to refer to the length of time that something is in operation or being executed, often in contexts like software, events, or processes. Example: "The running duration of the application was significantly reduced after the latest update."
✓ Grammatically correct
Science
Wiki
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
12 human-written examples
In all experiments running duration was continuously recorded.
One is the stopping and running duration limitations of injection operations and another one is the flow rate stability requirements of injection and delivery operations.
However, the running duration in our study was much longer than that of the other work with the longest stage averaging less than 8 h.
Science
"Go Missin'" has a running duration of three minutes and two seconds.
Wiki
"Rock Your Body" has a running duration of four minutes and 27 seconds.
Wiki
"Lemme See" is a mid-tempo R&B song that heavily incorporates synthesizers, and has a running duration of four minutes and 15 seconds.
Wiki
Human-verified similar examples from authoritative sources
Similar Expressions
47 human-written examples
Parameters included in the PCA were distance travelled, run duration and maximum speed.
Run duration and temperature program had no effect on the results.
Analysis of Kip2 landing events and run durations revealed that Bik1 and Bim1 increase the on-rate and reduce the off-rate of Kip2's microtubule encounters, indicating that these factors augment Kip2's microtubule affinity.
Science
Runs > 3 s or > 0.5 μm were measured in duration or run length analysis, respectively.
Science
In addition, we found no difference between genotypes in the distribution of wheel running bout durations or the mean bout duration (mean bout duration WT: 90.9±14.4 s vs. DKO: 84.3±10.6 s; p>0.05).
Science
Expert writing Tips
Best practice
For technical reports, use "running duration" to specify the active time of a process, distinguishing it from idle or setup times.
Common error
Avoid using "running duration" when you need to specify the entire time from start to finish, including setup or cooldown periods. Instead, use "total time" or "overall duration" to encompass all phases of the process.
Source & Trust
81%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "running duration" functions as a noun phrase, typically serving as a subject, object, or complement in a sentence. As Ludwig AI suggests, it identifies a specific period of activity, particularly in scientific or technical contexts, which allows the phrase to quantify the time elapsed during a particular operation or exercise.
Frequent in
Science
70%
Wiki
15%
News & Media
5%
Less common in
Formal & Business
4%
Encyclopedias
3%
Reference
3%
Ludwig's WRAP-UP
In summary, the phrase "running duration" accurately describes the length of time something is actively in progress, predominantly in scientific and technical contexts. Ludwig AI identifies the phrase as grammatically correct, although its frequency is uncommon compared to more general terms like "total duration". The phrase's primary purpose is to provide a precise measurement for scientific analysis and technical reporting. While acceptable in formal writing, considering alternatives like "operational time" or "execution duration" may better suit specific situations, enhancing clarity and impact.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
runtime
A more concise and technical term for the length of execution, especially in computing.
operational time
Focuses on the time a system or device is actively operating.
operation duration
Highlights the length of an operational process or task.
duration of activity
A more descriptive term, specifying the length of any kind of activity.
exercise time
Specifically refers to the duration of an exercise activity.
period of operation
Formal term for the length of time something is operational.
active period
Emphasizes the time span of activity or engagement.
performance time
Relates to the duration of a specific performance or execution.
time spent running
Focuses on the amount of time dedicated to the act of running.
service life
Emphasizes the length of time a product or service remains functional.
FAQs
What is the difference between "running duration" and total duration?
"Running duration" refers specifically to the time a process or activity is actively in progress, while total duration includes any setup, cooldown, or idle periods. For example, the "total duration" of an experiment might include preparation time, whereas the "running duration" only counts the actual experimental phase.
How can I accurately measure the "running duration" of a software application?
You can measure the "running duration" of a software application by logging the start and end times of its primary processing loop, excluding any initialization or shutdown sequences. Use system calls or internal timers to get precise measurements.
In exercise science, what does "running duration" typically refer to?
In exercise science, "running duration" usually refers to the length of time a subject spends actively running, excluding warm-up, cool-down, or rest periods. It's a key metric for assessing endurance and training effectiveness.
What are some alternatives to "running duration" in a formal report?
In a formal report, you could use alternatives such as "operational time", "active period", or "execution duration" to refer to "running duration", depending on the specific context. These terms often convey a more precise or professional tone.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
81%
Authority and reliability
4.5/5
Expert rating
Real-world application tested