Comparison of visual, automatic and semiautomatic methods to determine ventilatory indices in 50 to 60 years old adults

Pühringer, Martin; Ring-Dimitriou, Susanne; Stöggl, Thomas; Iglseder, Bernhard; Paulweber, Bernhard

doi:10.1080/02640414.2020.1725993

Cited by 6 publications

(6 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To determine AnT by detecting of RCP, i.e. VT2, we used visual methods, after polynomial regression analysis of trends in the dynamics of ventilatory variables: Ve, VCO 2 , VO 2 , values of Ve/VCO 2 , Ve/ VO 2 , and RER versus time [23,24]. According to Beaver et al [23] RCP cannot always be detected, which is also confirmed by the experience of Ekkekakis et al [25].…”

Section: Determination Of Ant By Rcpmentioning

confidence: 78%

See 1 more Smart Citation

Comparison between determination of second anaerobic threshold by respiratory compensating point and X-method in rowers

Stefanov¹

2022

ppcs

View full text Add to dashboard Cite

Background and Study Aim. The aim of this study is to verify the X-method for determining the second anaerobic threshold in rowers.Material and Methods. Twelve male athletes from the national rowing team of Bulgaria were tested. Participants performed a one-time graded incremental exercise test to exhaustion on a rowing ergometer. The workload were conducted on rowing ergometer system Concept 2, and spirometry system Clark C5. We obtained ventilatory indices, intensity and heart rate bred-by-bred for each participant, for each test stage. The anaerobic threshold was determined by two methods: 1) by the localization of the respiratory compensation point visually, after polynomial regression analysis of the trends for the dynamics of the ventilatory variables related to time and 2) by the X-method using the change in the ratio between heart rate and pulmonary ventilation. We compared the heart rate corresponding to the anaerobic threshold determined by both methods.Results. We found similar values for heart rate at the respiratory compensation point and the anaerobic threshold determined by the X-method for each of the investigated. The Shapiro-Wilk test showed a normal distribution of the two samples with a significance level of α = 0.05. Thus, the t-test for two paired samples showed a p-value of 0.202 at α = 0.05. We found a correlation coefficient r = 0.973 between the heart rate at the anaerobic threshold (determined by X-method) and the heart rate at the anaerobic threshold (detected at the respiratory compensation point). The Blant-Altman analysis showed that 95% of the points in the scatter plot lie within the confidence interval.Conclusions. The two methods give similar results and can be applied alternatively in the investigation of rowers in the age group 18.3 ± 1.07 years. The X-method always gives a reliable intersection point, which in our studies is close to the second anaerobic threshold. Comparative studies are also needed in other contingents for the wider use of the X-method.

show abstract

Section: Determination Of Ant By Rcpmentioning

confidence: 78%

“…Santos & Giannella-Neto detected RCP in 88% of VO2max [32]. Pühringer et al detect VT2 at 83 ± 10% of VO 2peak [24].…”

Section: Discussionmentioning

confidence: 98%

Comparison between determination of second anaerobic threshold by respiratory compensating point and X-method in rowers

Stefanov¹

2022

ppcs

View full text Add to dashboard Cite

show abstract

“…Santos & Giannella-Neto found AnT at 88% of VO 2max (Santos, 2004). Pühringer et al found VT2 at 83 ± 10% of VO 2peak (Pühringer, 2020).…”

Section: Resultsmentioning

confidence: 98%

Correlation Between Control Test Times Related to the Anaerobic Threshold Determined by the X-Method in Rowers

Stefanov¹,

Neykov²,

Mladenov³

2022

Proceeding Book Vol.1

View full text Add to dashboard Cite

Aim: The aim of the study is to investigate the correlation between the times for overcoming the distance of 2000 m achieved in control tests on the water and the anaerobic threshold determined by the X-method in laboratory conditions. Material and Methods: Includes collection and analysis of the times achieved in overcoming the distance of 2000 m and the anaerobic threshold determined by the X-method, related to the individual ergometric power and heart rate for each participant. Five elite rowers from the National Team of Bulgaria, men, for the period from 2018 to 2021 were examined. To determine the anaerobic threshold by the X-method, we used the data from minute pulmonary ventilation and heart rate recorded every 20 s during the maximum spiroergometric test with increasing intensity. The test was performed on a Concept II rowing machine and equipment measuring pulmonary ventilation and heart rate. Results: The Pearson coefficient r = .457 ( = .05) shows a moderate correlation between the times for overcoming the distance of 2000 m, and the heart rate recorded at the anaerobic threshold determined by the X-method. Conclusion: The X-method for determining the anaerobic threshold is an relevant method in the control of the training process and has prognostic value in determining the functional status of rowers. An advantage is the significantly lower cost of the used diagnostic equipment compared to the cost of a conventional gas analyzer.

show abstract

“…The ventilatory indices POE, AT and RCP were determined semiautomatic by combining automatic and visual detection methods ( 34 ). First, the indices were determined automatically using polynomial regression.…”

Section: Methodsmentioning

confidence: 99%

Sequencing patterns of ventilatory indices in less trained adults

Pühringer

Ring-Dimitriou

Iglseder

et al. 2023

Front. Sports Act. Living

Self Cite

View full text Add to dashboard Cite

Submaximal ventilatory indices, i.e., point of optimal ventilatory efficiency (POE) and anaerobic threshold (AT), are valuable indicators to assess the metabolic and ventilatory response during cardiopulmonary exercise testing (CPET). The order in which the ventilatory indices occur (ventilatory indices sequencing pattern, VISP), may yield additional information for the interpretation of CPET results and for exercise intensity prescription. Therefore, we determined whether different VISP groups concerning POE and AT exist. Additionally, we analysed fat metabolism via the exercise intensity eliciting the highest fat oxidation rate (Fatmax) as a possible explanation for differences between VISP groups. 761 less trained adults (41–68 years) completed an incremental exercise test on a cycle ergometer until volitional exhaustion. The ventilatory indices were determined using automatic and visual detection methods, and Fatmax was determined using indirect calorimetry. Our study identified two VISP groups with a lower work rate at POE compared to AT in VISPPOE < AT but not in group VISPPOE = AT. Therefore, training prescription based on POE rather than AT would result in different exercise intensity recommendations in 66% of the study participants and consequently in unintended physiological adaptions. VISPPOE < AT participants were not different to VISPPOE = AT participants concerning VO2peak and Fatmax. However, participants exhibiting a difference in work rate (VISPPOE < AT) were characterized by a higher aerobic capacity at submaximal work rate compared to VISPPOE = AT. Thus, analysing VISP may help to gain new insights into the complex ventilatory and metabolic response to exercise. But a methodological framework still must be established.

show abstract

Comparison of visual, automatic and semiautomatic methods to determine ventilatory indices in 50 to 60 years old adults

Cited by 6 publications

References 20 publications

Comparison between determination of second anaerobic threshold by respiratory compensating point and X-method in rowers

Comparison between determination of second anaerobic threshold by respiratory compensating point and X-method in rowers

Correlation Between Control Test Times Related to the Anaerobic Threshold Determined by the X-Method in Rowers

Sequencing patterns of ventilatory indices in less trained adults

Contact Info

Product

Resources

About