Estimated times to exhaustion and power outputs at the gas exchange threshold, physical working capacity at the rating of perceived exertion threshold, and respiratory compensation point

2012 ◽  
Vol 37 (5) ◽  
pp. 872-879 ◽  
Author(s):  
Haley C. Bergstrom ◽  
Terry J. Housh ◽  
Jorge M. Zuniga ◽  
Clayton L. Camic ◽  
Daniel A. Traylor ◽  
...  
Keyword(s):  
Gas Exchange ◽  
Perceived Exertion ◽  
Compensation Point ◽  
Rating Of Perceived Exertion ◽  
Physical Working Capacity ◽  
Working Capacity ◽  
Respiratory Compensation Point ◽  
Respiratory Compensation ◽  
Power Outputs ◽  
Gas Exchange Threshold

The purposes of this study were to compare the power outputs and estimated times to exhaustion (Tlim) at the gas exchange threshold (GET), physical working capacity at the rating of perceived exertion threshold (PWCRPE), and respiratory compensation point (RCP). Three male and 5 female subjects (mean ± SD: age, 22.4 ± 2.8 years) performed an incremental test to exhaustion on an electronically braked cycle ergometer to determine peak oxygen consumption rate, GET, and RCP. The PWCRPE was determined from ratings of perceived exertion data recorded during 3 continuous workbouts to exhaustion. The estimated Tlim values for each subject at GET, PWCRPE, and RCP were determined from power curve analyses (Tlim = axb). The results indicated that the PWCRPE (176 ± 55 W) was not significantly different from RCP (181 ± 54 W); however, GET (155 ± 42 W) was significantly less than PWCRPE and RCP. The estimated Tlim for the GET (26.1 ± 9.8 min) was significantly greater than PWCRPE (14.6 ± 5.6 min) and RCP (11.2 ± 3.1 min). The PWCRPE occurred at a mean power output that was 13.5% greater than the GET and, therefore, it is likely that the perception of effort is not driven by the same mechanism that underlies the GET (i.e., lactate buffering). Furthermore, the PWCRPE and RCP were not significantly different and, therefore, these thresholds may be associated with the same mechanisms of fatigue, such as increased levels of interstitial and (or) arterial [K+].

Validation of a Maximal Incremental Skating Test Performed on a Slide Board: Comparison With Treadmill Skating

2017 ◽  
Vol 12 (10) ◽  
pp. 1363-1369 ◽  
Author(s):  
Tatiane Piucco ◽  
Fernando Diefenthaeler ◽  
Rogério Soares ◽  
Juan M. Murias ◽  
Guillaume Y. Millet
Keyword(s):  
Heart Rate ◽  
Gas Exchange ◽  
Oxygen Uptake ◽  
Endurance Performance ◽  
Criterion Validity ◽  
Compensation Point ◽  
Respiratory Compensation Point ◽  
Respiratory Compensation ◽  
Gas Exchange Threshold

Purpose: To investigate the criterion validity of a maximal incremental skating test performed on a slide board (SB). Methods: Twelve subelite speed skaters performed a maximal skating test on a treadmill and on a SB. Gas exchange threshold (GET), respiratory compensation point (RCP), and maximal variables were determined. Results: Oxygen uptake () (31.0 ± 3.2 and 31.4 ± 4.1 mL·min−1·kg−1), percentage of maximal () (66.3 ± 4 and 67.7 ± 7.1%), HR (153 ± 14 and 150 ±12 bpm), and ventilation (59.8 ± 11.8 and 57.0 ± 10.7 L·min−1) at GET, and (42.5 ± 4.4 and 42.9 ± 4.8 mL·min−1·kg−1), percentage of (91.1 ± 3.3 and 92.4 ± 2.1%), heart rate (HR) (178 ± 9 and 178 ± 6 bpm), and ventilation (96.5 ± 19.2 and 92.1 ± 12.7 L·min−1) at RCP were not different between skating on a treadmill and on a SB. (46.7 ± 4.4 vs 46.4 ±6.1 mL·min−1·kg−1) and maximal HR (195 ± 6 vs 196 ± 10 bpm) were not significantly different and correlated (r = .80 and r = .87, respectively; P < .05) between the treadmill and SB. at GET, RCP, and obtained on a SB were correlated (r > .8) with athletes’ best times on 1500 m. Conclusions: The incremental skating test on a SB was capable to distinguish maximal ( and HR) and submaximal (, % , HR, and ventilation) parameters known to determine endurance performance. Therefore, the SB test can be considered as a specific and practical alternative to evaluate speed skaters.

A Test for Determining Physical Working Capacity at the Rating of Perceived Exertion Threshold

2006 ◽  
Vol 38 (Supplement) ◽  
pp. S508
Author(s):  
Michelle Mielke ◽  
Moh H. Malek ◽  
Terry J. Housh ◽  
Jared W. Coburn ◽  
Richard J. Schmidt ◽  
...  
Keyword(s):  
Perceived Exertion ◽  
Rating Of Perceived Exertion ◽  
Physical Working Capacity ◽  
Working Capacity

Perceptually Regulated Exercise Test Allows Determination of V˙O2max and Ventilatory Threshold But Not Respiratory Compensation Point In Trained Runners

2018 ◽  
Vol 39 (04) ◽  
pp. 304-313
Author(s):  
Perrine Truong ◽  
Gregoire Millet ◽  
Boris Gojanovic
Keyword(s):  
Exercise Test ◽  
Ventilatory Threshold ◽  
Compensation Point ◽  
Rating Of Perceived Exertion ◽  
Long Distance ◽  
Respiratory Compensation Point ◽  
Respiratory Compensation ◽  
Graded Exercise Test ◽  
Graded Exercise ◽  
Trained Runners

AbstractThis study aimed to investigate the differences in maximal oxygen uptake (V̇O2max) and submaximal thresholds between a standard graded exercise test (GXT) and a perceptually regulated graded exercise test (PRGXT) in trained runners. Eleven well-trained middle- to long-distance runners performed both tests in a randomized order. PRGXT used incremental “clamps” of rating of perceived exertion (RPE) over 10×1-min stages on an automated treadmill equipped with a sonar sensor allowing them to change their running speed instantly and in a natural way. GXT used fixed 1 km.h−1 increment every minute. Ventilatory threshold (VT) and respiratory compensation point (RCP) were determined using ventilatory equivalents. No differences were found in V̇O2max (68.0 (5.3) vs. 69.5 (5.9) ml·min−1·kg−1, p=0.243), minute ventilation (V̇E) (159.4 (35.0) vs. 162.4 (33.7) l·min−1, p=0.175), heart rate (HR) (188.4 (6.9) vs. 190.7 (5.2) bpm, p=0.254) and speed (21.0 (1.7) vs. 21.1 (2.3) km·h-1, p=0.761) between GXT and PRGXT. At VT, there were no significant differences between GXT and PRGXT for any outcome variables. For 8 of 11 subjects, it was not possible to determine RCP from ventilatory equivalent in PRGXT. GXT appears more relevant for a comprehensive gas analysis in trained runners.

Prescribing and Self-Regulating Heated Water-Based Exercise by Rating of Perceived Exertion in Older Individuals With Hypertension

2021 ◽  
pp. 1-6
Author(s):  
Isabela Roque Marçal ◽  
Bianca Fernandes ◽  
Vanessa Teixeira do Amaral ◽  
Renato Lopes Pelaquim ◽  
Emmanuel Gomes Ciolac
Keyword(s):  
Heart Rate ◽  
Anaerobic Threshold ◽  
High Intensity ◽  
Perceived Exertion ◽  
Compensation Point ◽  
Rating Of Perceived Exertion ◽  
Older Individuals ◽  
Respiratory Compensation ◽  
Graded Exercise ◽  
Water Based

We aimed to analyze the usefulness of the 6–20 rating of perceived exertion (RPE) scale for prescribing and self-regulating high-intensity interval (HIIE) and moderate-intensity continuous (MICE) aerobic exercise performed in a heated swimming pool (32 °C). Fifteen older individuals (65 ± 3 years) treated for hypertension underwent a symptom-limited maximal graded exercise test to determine their heart rate at anaerobic threshold, and respiratory compensation point. On different days, participants were randomized to HIIE (walking/jogging between 11 and 17 of RPE; 25 min) and MICE (walking at 11–13 of RPE; 30 min). Heart rate during the low-intensity intervals of HIIE and MICE remained below the graded exercise test’s heart rate at anaerobic threshold (−7 ± 18 bpm/−16 ± 15 bpm) and respiratory compensation point (−18 ± 18 bpm/−30 ± 16 bpm), respectively, and maintained in the aerobic training zone during the high-intensity intervals of HIIE (+8 ± 18 bpm/−4 ± 19 bpm). The RPE scale at 15–17 is a useful tool for prescribing and self-regulating heated water-based HIIE and may have important implications for water-based exercise in older individuals with hypertension.

The Development of Rating of Perceived Exertion-Based Tests of Physical Working Capacity

2008 ◽  
Vol 22 (1) ◽  
pp. 293-302 ◽  
Author(s):  
Michelle Mielke ◽  
Terry J Housh ◽  
Moh H Malek ◽  
Travis W Beck ◽  
Richard J Schmidt ◽  
...  
Keyword(s):  
Perceived Exertion ◽  
Rating Of Perceived Exertion ◽  
Physical Working Capacity ◽  
Working Capacity

scholarly journals EMG breakpoints for detecting anaerobic threshold and respiratory compensation point in recovered COVID-19 patients

2021 ◽  
pp. 102567
Author(s):  
Murillo Frazão ◽  
Paulo Eugênio Silva ◽  
Lucas de Assis Pereira Cacau ◽  
Tullio Rocha Petrucci ◽  
Mariela Cometki Assis ◽  
...  
Keyword(s):  
Anaerobic Threshold ◽  
Compensation Point ◽  
Respiratory Compensation Point ◽  
Respiratory Compensation

scholarly journals A Rapidly-Incremented Tethered-Swimming Test for Defining Domain-Specific Training Zones

2017 ◽  
Vol 57 (1) ◽  
pp. 117-128
Author(s):  
Dalton M. Pessôa Filho ◽  
Leandro O.C. Siqueira ◽  
Astor R. Simionato ◽  
Mário A.C. Espada ◽  
Daniel S. Pestana ◽  
...  
Keyword(s):  
Gas Exchange ◽  
Work Rate ◽  
Metabolic Rates ◽  
Incremental Test ◽  
Domain Specific ◽  
Respiratory Compensation ◽  
Exercise Economy ◽  
Constant Work Rate ◽  
Swimming Test ◽  
Gas Exchange Threshold

AbstractThe purpose of this study was to investigate whether a tethered-swimming incremental test comprising small increases in resistive force applied every 60 seconds could delineate the isocapnic region during rapidly-incremented exercise. Sixteen competitive swimmers (male, n = 11; female, n = 5) performed: (a) a test to determine highest force during 30 seconds of all-out tethered swimming (Favg) and the ΔF, which represented the difference between Favg and the force required to maintain body alignment (Fbase), and (b) an incremental test beginning with 60 seconds of tethered swimming against a load that exceeded Fbase by 30% of ΔF followed by increments of 5% of ΔF every 60 seconds. This incremental test was continued until the limit of tolerance with pulmonary gas exchange (rates of oxygen uptake and carbon dioxide production) and ventilatory (rate of minute ventilation) data collected breath by breath. These data were subsequently analyzed to determine whether two breakpoints defining the isocapnic region (i.e., gas exchange threshold and respiratory compensation point) were present. We also determined the peak rate of O2 uptake and exercise economy during the incremental test. The gas exchange threshold and respiratory compensation point were observed for each test such that the associated metabolic rates, which bound the heavy-intensity domain during constant-work-rate exercise, could be determined. Significant correlations (Spearman’s) were observed for exercise economy along with (a) peak rate of oxygen uptake (ρ = .562; p < 0.025), and (b) metabolic rate at gas exchange threshold (ρ = −.759; p < 0.005). A rapidly-incremented tethered-swimming test allows for determination of the metabolic rates that define zones for domain-specific constant-work-rate training.

Respiratory compensation point

2021 ◽  
pp. 93-96
Author(s):  
William J.M. Kinnear ◽  
James H. Hull
Keyword(s):  
Carbon Dioxide ◽  
Minute Ventilation ◽  
Cardiopulmonary Exercise Test ◽  
Compensation Point ◽  
Respiratory Compensation Point ◽  
Carbon Dioxide Output ◽  
Respiratory Compensation ◽  
Cardiopulmonary Exercise ◽  
The Subject ◽  
Maximal Effort

This chapter describes how acidaemia stimulates ventilation in the later stages of a cardiopulmonary exercise test (CPET). This happens after the anaerobic threshold, once the capacity of the blood to buffer lactic acid has been used up. The respiratory compensation point (RCP) can be identified from an increase in the slope when minute ventilation (VE) is plotted against carbon dioxide output (VCO2), or from a rise in the ventilatory equivalents for carbon dioxide (VeqCO2). The presence of a clear RCP indicates that the subject has made a fairly maximal effort during the CPET. An RCP also argues against significant lung disease, since it implies the ability to increase ventilation in response to acidaemia.

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