Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Assessment of Ventilation I: Respiratory Rate01:20

Assessment of Ventilation I: Respiratory Rate

Assessment of Ventilation
A Ventilation assessment is critical for monitoring a patient's health status. Respiration, one of the most accessible vital signs, provides insights into the function of numerous body systems and can indicate serious health issues, such as brainstem injuries from head trauma.
Critical Guidelines for Assessing Ventilation:
Factors Affecting Pulmonary Ventilation01:19

Factors Affecting Pulmonary Ventilation

Besides the pressure difference between the external environment and the lungs, the airflow rate and ease of pulmonary ventilation are also influenced by three other factors: surface tension of the fluid in the alveoli, compliance of the lungs, and airway resistance.
Alveolar Surface Tension
The alveolar fluid lines the luminal surface of the alveoli and exerts a force called surface tension. This force is caused by the polar water molecules in the liquid being more strongly attracted to each...
Assessment of Ventilation II: Respiratory Depth and Rhythm01:29

Assessment of Ventilation II: Respiratory Depth and Rhythm

Respiratory Depth
Respiratory depth measures the volume of air inhaled or exhaled during a breath. It can vary from shallow to deep and typically remains consistent when a person is at rest or asleep. Occasionally, individuals will automatically inhale deeply, known as sighing, which inflates the lungs with more air than normal breathing.
To assess respiratory depth, observe the degree of chest excursion or movement:
Factors Influencing Heart Rate01:30

Factors Influencing Heart Rate

The heart rate, or pulse rate, is a vital indicator of cardiovascular health. It reflects the number of times the heart beats per minute. Various physiological and environmental factors influence heart rate, increasing or decreasing cardiac output. Understanding these factors is crucial for assessing heart function and identifying potential health issues.
Let us explore the significant factors affecting heart rate, including age, body temperature, posture, acute pain, chemical influences,...
Special considerations while measuring oxygen saturation01:19

Special considerations while measuring oxygen saturation

Assessing respiratory rate concurrently with pulse measurement is fundamental to patient care, providing valuable insights into the patient's respiratory function. The normal breathing rate for an adult usually falls within a normal range of 12 to 20 breaths per minute. Abnormal respiratory rates can signal underlying health conditions or the need for immediate intervention.
Ensuring accuracy in vital sign recordings while prioritizing patient comfort and minimizing anxiety is important. 
Factors Affecting Respiration01:24

Factors Affecting Respiration

Respiration is a crucial physiological function involving exchanging oxygen (O2) and carbon dioxide (CO2) between an organism and its environment. Various factors can impact this essential process:

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Generalised random tessellation stratified sampling over auxiliary spaces.

Journal of applied statistics·2025
Same author

Investigating the Dynamics of Salmonella Contamination During Commercial Pork Harvest Using Qualitative and Quantitative Detection Methods.

Journal of food protection·2025
Same author

Investigating drug trends among people who inject drugs: Temporal, geographical and operational analyses of used syringes in Sydney, Australia.

The International journal on drug policy·2025
Same author

The gastrointestinal tract microbiome of Holstein × Angus cross cattle is negatively impacted by the pre-harvest process.

Applied and environmental microbiology·2025
Same author

Abstracts of presentations to the Annual Meetings of the Canadian Society of Colon and Rectal Surgeons Canadian Association of General Surgeons Canadian Association of Thoracic Surgeons: Canadian Surgery Forum, Toronto, Ont., September 6-9, 2007.

Canadian journal of surgery. Journal canadien de chirurgie·2023
Same author

Effect of season on weaned piglet mortality during transport greater than 8 h under Canadian conditions.

Preventive veterinary medicine·2023
Same journal

Neuromuscular electrical stimulation after anterior cruciate ligament reconstruction.

International journal of sports medicine·2026
Same journal

Exercise Intensity Effects on Irisin in Master Athletes and Links With Maximal Oxygen Uptake and Body Fat.

International journal of sports medicine·2026
Same journal

Evolution of the Australian Institute of Sport Supplement Program over the last 25 years.

International journal of sports medicine·2026
Same journal

Preseason Passive Torque Asymmetries in Soccer Players with Hamstring Strain Injury.

International journal of sports medicine·2026
Same journal

Musculoskeletal Burden in German Equestrians: Hip-Specific Symptoms and Risk Factors.

International journal of sports medicine·2026
Same journal

Trans-inclusion in sports: history, scientific evidence and future directions.

International journal of sports medicine·2026
See all related articles

Related Experiment Video

Updated: Jun 24, 2026

Calculating Heart Rate Variability from ECG Data from Youth with Cerebral Palsy During Active Video Game Sessions
08:12

Calculating Heart Rate Variability from ECG Data from Youth with Cerebral Palsy During Active Video Game Sessions

Published on: June 5, 2019

Heart rate variability and ventilatory efficiency.

S J Brown1, J A Brown

  • 1IFNHH, Massey University, Auckland, New Zealand. s.j.brown@massey.ac.nz

International Journal of Sports Medicine
|March 21, 2009
PubMed
Summary
This summary is machine-generated.

Resting high frequency heart rate variability (HF(NU)) is linked to better ventilatory efficiency in endurance athletes. This suggests HF(NU) influences lung blood flow and ventilation matching during exercise.

More Related Videos

Investigation into Deep Breathing through Measurement of Ventilatory Parameters and Observation of Breathing Patterns
08:34

Investigation into Deep Breathing through Measurement of Ventilatory Parameters and Observation of Breathing Patterns

Published on: September 16, 2019

Assessment of Physical Activity Intensity with Accelerometers and Oxygen Consumption
08:45

Assessment of Physical Activity Intensity with Accelerometers and Oxygen Consumption

Published on: June 20, 2025

Related Experiment Videos

Last Updated: Jun 24, 2026

Calculating Heart Rate Variability from ECG Data from Youth with Cerebral Palsy During Active Video Game Sessions
08:12

Calculating Heart Rate Variability from ECG Data from Youth with Cerebral Palsy During Active Video Game Sessions

Published on: June 5, 2019

Investigation into Deep Breathing through Measurement of Ventilatory Parameters and Observation of Breathing Patterns
08:34

Investigation into Deep Breathing through Measurement of Ventilatory Parameters and Observation of Breathing Patterns

Published on: September 16, 2019

Assessment of Physical Activity Intensity with Accelerometers and Oxygen Consumption
08:45

Assessment of Physical Activity Intensity with Accelerometers and Oxygen Consumption

Published on: June 20, 2025

Area of Science:

  • Exercise Physiology
  • Cardiovascular Physiology
  • Respiratory Physiology

Background:

  • Heart rate variability (HRV) reflects autonomic nervous system function.
  • High frequency (HF) component of HRV is associated with parasympathetic activity.
  • Ventilatory efficiency is a key indicator of aerobic fitness in athletes.

Purpose of the Study:

  • To investigate the relationship between resting high frequency heart rate variability (HF(NU)) and ventilatory efficiency during exercise in endurance-trained athletes.
  • To determine if HF(NU) can predict ventilatory efficiency across different exercise intensities.

Main Methods:

  • 12 endurance-trained athletes performed incremental exercise tests to volitional exhaustion.
  • Ventilatory variables (V'E, V'CO2, V'O2) were measured.
  • Resting HF(NU) was calculated using spectral analysis of ECG data.
  • The relationship between HF(NU) and the V'E vs. V'CO2 slope was analyzed.

Main Results:

  • A significant negative linear relationship was found between resting HF(NU) and the V'E vs. V'CO2 slope up to the anaerobic threshold (R(2)=0.69).
  • A similar negative association was observed when data extended to maximal oxygen uptake (R(2)=0.56).
  • No significant association was found between the minimum V'E:V'CO2 ratio and resting HF(NU) (R(2)=0.08).

Conclusions:

  • Resting HF(NU) is associated with ventilatory efficiency in endurance athletes.
  • These findings suggest a role for parasympathetic activity, as reflected by HF(NU), in optimizing lung perfusion and ventilation matching during exercise.
  • Further research is warranted to explore the mechanistic links between autonomic function and respiratory control during physical exertion.