vital capacity
LowTechnical / Medical / Scientific
Definition
Meaning
The maximum volume of air a person can exhale after a maximum inhalation, used as a measure of respiratory function.
A quantifiable measurement from pulmonary function tests, often interpreted as an indicator of lung health, respiratory muscle strength, and overall physical fitness.
Linguistics
Semantic Notes
A specific, measurable term from physiology and clinical medicine. It is a compound noun where 'vital' refers to 'life' or 'living', and 'capacity' refers to a measurable volume.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or semantic differences. Spelling of related terms may differ (e.g., 'behaviour' vs. 'behavior').
Connotations
Purely technical, neutral, and clinical in both regions.
Frequency
Equally low-frequency in both, confined to medical, physiological, and fitness contexts.
Vocabulary
Collocations
Grammar
Valency Patterns
The patient has a [ADJECTIVE] vital capacity.We need to measure [POSSESSIVE] vital capacity.Vital capacity is measured in litres.Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “None”
Usage
Context Usage
Business
Virtually never used.
Academic
Used in medical, nursing, physiology, sports science, and public health research papers and textbooks.
Everyday
Very rare; might be mentioned in advanced fitness or health discussions.
Technical
The primary context. Used in clinical diagnoses (e.g., COPD, asthma), pulmonary function test reports, fitness assessments, and disability evaluations.
Examples
By Part of Speech
verb
British English
- The physiotherapist will vital-capacity-test the athlete.
- The patient was vital capacity assessed.
American English
- The doctor had him vital capacity tested.
- We need to vital capacity measure all participants.
adverb
British English
- The lungs were functioning vital-capacity-wise within normal limits.
- He performed vital-capacity-poorly on the test.
American English
- She breathed vital-capacity-strong during the exam.
- The machine analyses vital-capacity-accurately.
adjective
British English
- The vital-capacity reading was low.
- It was a vital-capacity measurement device.
American English
- The vital capacity results were concerning.
- They reviewed the vital-capacity data.
Examples
By CEFR Level
- The doctor measured his vital capacity.
- Smoking can reduce your vital capacity.
- Patients with asthma often exhibit a decreased vital capacity, which can be monitored with a spirometer.
- The study compared the vital capacity of swimmers versus runners.
- Despite the apparent fitness of the patient, his forced vital capacity had declined by 20% over the preceding year, indicating a restrictive lung pathology.
- The correlation between vital capacity and maximal oxygen uptake (VO2 max) is a key metric in exercise physiology.
Learning
Memory Aids
Mnemonic
Think of your lungs as a 'vital' (essential for life) container. Its 'capacity' is how much air it can hold and expel.
Conceptual Metaphor
THE BODY IS A MACHINE / LUNGS ARE BELLOWS. Vital capacity measures the efficiency and volume of the 'bellows'.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid direct translation as 'жизненная ёмкость', which, while technically correct, is a highly specific medical term in Russian and sounds unnatural in general conversation.
- Do not confuse with general 'endurance' or 'stamina' (выносливость). It is a precise measurement.
Common Mistakes
- Using it as a general synonym for 'lung health' or 'stamina'.
- Pronouncing 'vital' as /ˈvɪt.əl/ (like 'little') instead of /ˈvaɪ.təl/.
- Writing it without a hyphen, as it is a standard open compound noun.
Practice
Quiz
In which context is the term 'vital capacity' MOST appropriately used?
FAQ
Frequently Asked Questions
Not exactly. It is a specific, dynamic measurement of usable air volume, not the total anatomical size of the lungs, which includes air that cannot be exhaled (residual volume).
Yes, to some degree through sustained cardiovascular exercise and specific breathing techniques, as it depends on respiratory muscle strength and lung elasticity. However, it is largely determined by age, sex, height, and genetics.
'Vital capacity' is the maximum volume exhaled slowly and completely. 'Forced Vital Capacity' is the same volume but exhaled as forcefully and quickly as possible. FVC is the standard clinical measurement from spirometry.
The term dates to the 19th century. 'Vital' comes from Latin 'vitalis' (of life), reflecting that this volume of air is essential for and involved in sustaining life.