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Related Concept Videos

Exercise and Cardiovascular Response01:20

Exercise and Cardiovascular Response

Exercise significantly impacts cardiovascular response, which is crucial for understanding patient health and designing effective treatment plans.
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
Diffusion01:21

Diffusion

Diffusion is a type of passive transport. In passive transport, a substance tends to move from an area of high concentration to an area of low concentration until the concentration is equal across the space. For example, take the diffusion of substances through the air. When someone opens a perfume bottle in a room filled with people, the perfume is at its highest concentration in the bottle and is at its lowest at the edges of the room. The perfume vapor will diffuse, or spread away, from the...
Diffusion01:12

Diffusion

Diffusion is the passive movement of substances down their concentration gradients—requiring no expenditure of cellular energy. Substances, such as molecules or ions, diffuse from an area of high concentration to an area of low concentration in the cytosol or across membranes. Eventually, the concentration will even out, with the substance moving randomly but causing no net change in concentration. Such a state is called dynamic equilibrium, which is essential for maintaining overall...
Exercise and Cardiac Output01:17

Exercise and Cardiac Output

Regular physical activity is essential for maintaining cardiovascular health, with aerobic exercises being particularly effective. According to the American Heart Association, 150 minutes of moderate to intense aerobic exercise per week is recommended for a healthy heart. Aerobic activities may include brisk walking, running, bicycling, cross-country skiing, and swimming, ideally performed three to five times per week.
Sustained exercise increases the muscles' oxygen demand, which can be met...
External and Internal Respiration01:24

External and Internal Respiration

External respiration occurs in the lungs, and it is the first step in the journey of oxygen inside the body. When we inhale, oxygen enters our lungs and diffuses across the thin alveolar membrane. The alveoli are tiny, air-filled sacs that provide a vast surface area for gas exchange. Oxygen in the alveoli has a higher partial pressure (105 mmHg) than in the adjacent pulmonary capillaries (40 mmHg), establishing a pressure gradient. As a result, oxygen molecules move from the alveoli into the...
Gas Exchange and Transport01:20

Gas Exchange and Transport

Gas exchange, the intake of molecular oxygen (O2) from the environment and the outflow of carbon dioxide (CO2) into the environment, is necessary for cellular function. Gas exchange during respiration occurs largely via the movement of gas molecules along pressure gradients. Gas travels from areas of higher partial pressure to areas of lower partial pressure. In mammals, gas exchange occurs in the alveoli of the lungs, which are adjacent to capillaries and share a membrane with them.

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Related Experiment Video

Updated: May 9, 2026

Assessment of Pulmonary Capillary Blood Volume, Membrane Diffusing Capacity, and Intrapulmonary Arteriovenous Anastomoses During Exercise
07:09

Assessment of Pulmonary Capillary Blood Volume, Membrane Diffusing Capacity, and Intrapulmonary Arteriovenous Anastomoses During Exercise

Published on: February 20, 2017

Diffusion capacity in children: what happens with exercise?

Nicholas M Fitzgerald1, Dominic A Fitzgerald, Larry Lands

  • 1University of New South Wales, Sydney, Australia.

Paediatric Respiratory Reviews
|August 13, 2013
PubMed
Summary
This summary is machine-generated.

Limited data exists on children's exercise diffusion capacity. This review explores exercise-induced changes in diffusion capacity in children with cystic fibrosis, healthy children, and elite swimmers, highlighting its importance for lung disease prediction.

Keywords:
ChildrenCystic fibrosisDiffusion capacityExerciseSwimming athletes

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Conducting Maximal and Submaximal Endurance Exercise Testing to Measure Physiological and Biological Responses to Acute Exercise in Humans
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Last Updated: May 9, 2026

Assessment of Pulmonary Capillary Blood Volume, Membrane Diffusing Capacity, and Intrapulmonary Arteriovenous Anastomoses During Exercise
07:09

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Published on: February 20, 2017

Dual Test Gas Pulmonary Diffusing Capacity Measurement During Exercise in Humans Using the Single-Breath Method
08:44

Dual Test Gas Pulmonary Diffusing Capacity Measurement During Exercise in Humans Using the Single-Breath Method

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Conducting Maximal and Submaximal Endurance Exercise Testing to Measure Physiological and Biological Responses to Acute Exercise in Humans
07:26

Conducting Maximal and Submaximal Endurance Exercise Testing to Measure Physiological and Biological Responses to Acute Exercise in Humans

Published on: October 17, 2018

Area of Science:

  • Pediatric Pulmonology
  • Exercise Physiology

Background:

  • Limited data exists on diffusion capacity during exercise in pediatric populations.
  • Growing interest in exercise testing for predicting lung disease progression in children.
  • Understanding exercise-induced changes in diffusion capacity is crucial.

Purpose of the Study:

  • To review current knowledge on diffusion capacity during exercise in children.
  • To examine data in children with cystic fibrosis, healthy controls, and elite swimmers.
  • To highlight the significance of diffusion capacity alterations during exercise.

Main Methods:

  • Literature review of studies on pediatric diffusion capacity and exercise.
  • Analysis of data from children with cystic fibrosis, healthy controls, and swimmers.
  • Focus on changes in diffusion capacity during physical exertion.

Main Results:

  • Exercise can unmask alterations in diffusion capacity not apparent at rest.
  • Elite athletes like swimmers exhibit larger lung volumes, potentially influencing diffusion capacity.
  • Data synthesis on diffusion capacity changes across different pediatric groups during exercise.

Conclusions:

  • Exercise testing provides valuable insights into pediatric lung function.
  • Diffusion capacity during exercise is an important, yet understudied, area in children.
  • Further research is needed to fully understand exercise-induced diffusion capacity changes in pediatric lung disease.