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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:
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:
Assessment of Respiration01:23

Assessment of Respiration

The respiratory system's basic structures and primary functions lay the foundation for nurses' comprehensive respiratory assessments. This assessment includes subjective and objective data to gauge the patient's respiratory health.
Subjective Assessment: Nurses interview the patient to gather information directly during the subjective assessment. It includes questions about the individual's medical history, medications, and symptoms, focusing on past respiratory conditions like asthma or COPD,...
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...

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Assessment of Physical Activity Intensity with Accelerometers and Oxygen Consumption
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Anaerobic threshold assessment through the ventilatory method during roller-ski skating testing: right or wrong?

Nicolas Fabre1, Lorenzo Bortolan, Barbara Pellegrini

  • 1CeRiSM, Research Center for Sport, Mountain and Health, Rovereto, Italy. nicolas_fabre@hotmail.com

Journal of Strength and Conditioning Research
|January 10, 2012
PubMed
Summary

The ventilatory method to determine the respiratory compensation point (RCP) is unreliable during incremental roller-ski tests. Breathing frequency is subordinate to poling frequency, making RCP determination cautious.

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Area of Science:

  • Sports Science
  • Exercise Physiology
  • Biophysics

Background:

  • The anaerobic threshold, specifically the respiratory compensation point (RCP), is a key indicator in endurance sports.
  • Determining RCP using ventilatory methods during incremental exercise is common but may be influenced by specific movement patterns.

Purpose of the Study:

  • To question the validity of the ventilatory method for determining the respiratory compensation point (RCP) during an incremental roller-ski skating test to exhaustion.
  • To investigate the relationship between ventilatory parameters and poling mechanics in elite cross-country skiers.

Main Methods:

  • Nine elite cross-country skiers performed an incremental roller-ski test to exhaustion using the V2 skating technique.
  • Continuous breath-by-breath ventilatory data were collected using a portable gas exchange system.
  • Poling signals were recorded using instrumented ski poles and synchronized with ventilatory data.

Main Results:

  • Poor interobserver reliability and difficulty in determining RCP were observed among reviewers.
  • RCP could not be determined in 4 out of 9 skiers.
  • Breathing frequency (Bf) was found to be subordinate to poling frequency (Pf) throughout the test, with synchronized tidal volume and poling forces.

Conclusions:

  • The ventilatory method for RCP determination should be used cautiously during roller-ski skating due to strong dependence on mechanical factors, particularly poling patterns.
  • Upper body propulsion significantly influences ventilation determinants during incremental tests in this discipline.
  • Further research is needed to refine or validate alternative methods for assessing anaerobic threshold in poling-dominant activities.