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 Diffusion and Perfusion01:17

Assessment of Diffusion and Perfusion

Understanding and evaluating diffusion and perfusion is critical in assessing a patient's respiratory and circulatory health. These processes play key roles in maintaining the body's internal environment, ensuring that tissues receive adequate oxygen while waste products are efficiently removed.
The Role of Diffusion in Respiration
Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration. In the respiratory system, this principle...
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:
Mechanical Ventilation I: Indication and Settings01:29

Mechanical Ventilation I: Indication and Settings

Mechanical ventilation is a life-saving technique for managing acute respiratory failure and other respiratory complications. The process involves using a machine known as a ventilator to supply oxygen to the lungs and assist in removing carbon dioxide. It serves as a bridge to long-term mechanical ventilation or a temporary measure until ventilatory support is discontinued. The ventilator can maintain this function for a prolonged period, providing critical support for patients until they can...
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...
Respiratory Volumes and Capacities01:22

Respiratory Volumes and Capacities

The respiratory system is responsible for the intake of oxygen and the expulsion of carbon dioxide from the body. Respiratory volumes describe the volume of air in the lungs at different phases of the respiratory cycle. Tidal volume is the air breathed in and out during normal, quiet breathing. Inspiratory reserve volume is the air that can be forcefully inspired beyond the tidal volume. In contrast, expiratory reserve volume refers to the air that can be expelled from the lungs after a normal...
Respiratory Capacities01:24

Respiratory Capacities

Respiratory capacities are crucial indicators of lung function, representing the maximum amount of air an individual's respiratory system can handle during various breathing phases.
One key metric is the Inspiratory Capacity (IC), which represents the maximum amount of air that can be inhaled with full effort. IC is calculated by summing the tidal volume and inspiratory reserve volume, typically ranging from 2.4 to 3.6 liters.
The Functional Residual Capacity (FRC) represents the air in the...

You might also read

Related Articles

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

Sort by
Same author

Acute fatigue and recovery responses to resistance training performed to momentary muscular failure: an exploratory multimodal physiological study.

Scientific reports·2026
Same author

One Step Further in Resistance Training Prescription: Do Recent Updates Require Reconsideration?

Medicine and science in sports and exercise·2026
Same author

Systemic Degree of Perturbation of Plasma Markers Reveals Cumulative Biological Stress Across the Competitive Season in Professional Soccer Players.

Sports medicine (Auckland, N.Z.)·2026
Same author

Effects of Physical Exercise on Pain in Patients With Lumbar Disc Herniation: A Systematic Review and Meta-Analysis of Randomised Controlled Trials.

Musculoskeletal care·2026
Same author

The Impact of Green Exercise on Cardiovascular and Musculoskeletal Health in Middle-Aged and Older Adults: A Scoping Review.

European journal of investigation in health, psychology and education·2026
Same author

Corrigendum to "Isometric muscle endurance, linear acceleration, and change-of-direction ability: What are the effects of the personal protective equipment used by special military forces?" [J. Bodyw. Move. Ther. (44) (2025) 745-749].

Journal of bodywork and movement therapies·2026

Related Experiment Video

Updated: Jun 21, 2026

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

Prediction VO2max during cycle ergometry based on submaximal ventilatory indicators.

Rodolfo Alkmim Moreira Nunes1, Rodrigo Gomes de Souza Vale, Roberto Simão

  • 1Universidade Federal do Rio Grande do Norte, Natal, Brazil.

Journal of Strength and Conditioning Research
|August 14, 2009
PubMed
Summary
This summary is machine-generated.

This study developed a new equation to predict maximal oxygen consumption (VO2max) in women using submaximal cycle ergometer test data. The model accurately estimates VO2max from heart rate and workload thresholds, offering a practical alternative to maximal testing.

More Related Videos

Using Near-Infrared Spectroscopy Wearable Devices to Identify Central Versus Peripheral Limitations During Exercise
09:33

Using Near-Infrared Spectroscopy Wearable Devices to Identify Central Versus Peripheral Limitations During Exercise

Published on: December 19, 2024

A Rapidly Incremented Tethered-Swimming Maximal Protocol for Cardiorespiratory Assessment of Swimmers
09:24

A Rapidly Incremented Tethered-Swimming Maximal Protocol for Cardiorespiratory Assessment of Swimmers

Published on: January 28, 2020

Related Experiment Videos

Last Updated: Jun 21, 2026

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

Using Near-Infrared Spectroscopy Wearable Devices to Identify Central Versus Peripheral Limitations During Exercise
09:33

Using Near-Infrared Spectroscopy Wearable Devices to Identify Central Versus Peripheral Limitations During Exercise

Published on: December 19, 2024

A Rapidly Incremented Tethered-Swimming Maximal Protocol for Cardiorespiratory Assessment of Swimmers
09:24

A Rapidly Incremented Tethered-Swimming Maximal Protocol for Cardiorespiratory Assessment of Swimmers

Published on: January 28, 2020

Area of Science:

  • Exercise Physiology
  • Sports Science
  • Cardiorespiratory Fitness Assessment

Background:

  • Existing equations for predicting maximal oxygen consumption (VO2max) often rely on maximal ergometric tests.
  • A validated method for predicting VO2max using submaximal ventilatory thresholds from cycle ergometry is lacking.

Purpose of the Study:

  • To assess the accuracy of VO2max prediction models utilizing submaximal effort indicators.
  • To develop and validate a predictive equation for VO2max in healthy, non-athlete women using cycle ergometer data.

Main Methods:

  • A total of 4,640 healthy women (age ≥ 20) underwent maximal incremental cycle ergometer testing.
  • Subjects were randomly assigned to estimation (Group A) and validation (Group B) groups.
  • Multiple linear regression was used to build the VO2max prediction model based on weight, second workload threshold (WT2), and heart rate at the second threshold (HRT2).

Main Results:

  • A predictive model (VO2max = 40.302 - 0.497 [Weight] - 0.001 [HRT2] + 0.239 [WT2]) demonstrated high accuracy (r = 0.995, SEE = 0.68 mL O2/kg/min(-1)) in Group A.
  • Cross-validation in Group B confirmed the model's predictive capability with a low standard error of the estimate (SEE = 1.00%).

Conclusions:

  • Maximal oxygen consumption (VO2max) can be accurately predicted in healthy, non-athlete women using submaximal indicators from an incremental cycle ergometer test.
  • The developed multiple linear regression model provides a reliable and less strenuous method for assessing cardiorespiratory fitness.