Related Experiment Video
Updated: Aug 10, 2026

Conducting Maximal and Submaximal Endurance Exercise Testing to Measure Physiological and Biological Responses to Acute Exercise in Humans
Published on: October 17, 2018
Tests of forced expiration and inspiration
1Division of Respiratory Medicine, Imperial College School of Medicine, Hammersmith Hospital, London, United Kingdom.
Abstract:
Analysis of the volume versus time curve during a maximum effort forced expiratory vital capacity maneuver started from total lung capacity (TLC) is by far the most performed test of respiratory mechanics, having spread from the laboratory to the wards and outpatient clinics and gradually into the offices of general practitioners. In particular, forced expiratory volume in 1 second (FEV1) is the best characterized test of respiratorv function; information on changes with age, gender, ethnic group, growth and disease is more developed than for any other test, repeatability is good, and it provides useful information across the whole range from normal to advanced disease.
Related Concept Videos
Mechanism of Breathing I: Inspiration
The respiratory system, an essential network for breathing, comprises the conducting and respiratory zones, each playing a crucial role in the overall process of respiration. Let us explore the detailed mechanism of inspiration, or inhalation, which is the first phase of the respiratory cycle.
Pathway of Air during Inspiration
During inspiration, air enters our body through the nose or mouth and moves through the conducting zone,...
Respiratory Volumes and Capacities I
Respiratory Volumes
Tidal Volume (TV) Tidal volume (TV) is the air inhaled or exhaled in a...
Mechanism of Breathing II: Expiration
Expiration, or exhaling, is a complex physiological process that begins as the inspiratory muscles begin to relax. This relaxation triggers a series of events that epitomize the efficiency of the respiratory system.
Mechanism of Expiration:
Physical Assessment of the Respiratory Tract II: Inspection
Chest Configuration
The chest configuration can...
Pulmonary Function Tests
Pulmonary Function Tests are crucial diagnostic tools for assessing respiratory function, particularly in patients with chronic respiratory disorders. They comprehensively evaluate lung volumes, ventilatory function, breathing mechanics, diffusion, and gas exchange. These tests help diagnose pulmonary diseases and play a significant role in monitoring disease progression, evaluating disability, and assessing response to therapy.
PFTs involve using a spirometer, a...

