Excess Post-Exercise Oxygen Consumption Following Continuous and Interval Cycling Exercise

2005 ◽  
Vol 15 (1) ◽  
pp. 28-37 ◽  
Author(s):  
William McGarvey ◽  
Richard Jones ◽  
Stewart Petersen
Keyword(s):  
Oxygen Consumption ◽  
Respiratory Exchange Ratio ◽  
Physiological Responses ◽  
Random Order ◽  
Cycle Exercise ◽  
Post Exercise ◽  
Graded Exercise Test ◽  
Continuous Cycling ◽  
Graded Exercise ◽  
Interval Cycling

The purpose of this investigation was to examine the effect of interval (INT) and continuous (CON) cycle exercise on excess post-exercise oxygen consumption (EPOC). Twelve males first completed a graded exercise test for VO2max and then the two exercise challenges in random order on separate days approximately 1 wk apart. The INT challenge consisted of seven 2 min work intervals at 90% VO2max, each followed by 3 min of relief at 30% VO2max. The CON exercise consisted of 30 to 32 min of continuous cycling at 65% VO2max. Gas exchange and heart rate (HR) were measured for 30 min before, during, and for 2 h post-exercise. Three methods were used to analyze post-exercise oxygen consumption and all produced similar results. There were no significant differences in either the magnitude or duration of EPOC between the CON and INT protocols. HR, however, was higher (P < 0.05) while respiratory exchange ratio (RER) was lower (P < 0.05) following INT. These results indicate that when total work was similar, the magnitude and duration of EPOC were similar following CON or INT exercise. The differences in HR and RER during recovery suggest differential physiological responses to the exercise challenges.

Development of an On-Water Graded Exercise Test for Flat-Water Sprint Kayak Athletes

2019 ◽  
Vol 14 (9) ◽  
pp. 1244-1249 ◽  
Author(s):  
Chelsie E. Winchcombe ◽  
Martyn J. Binnie ◽  
Matthew M. Doyle ◽  
Cruz Hogan ◽  
Peter Peeling
Keyword(s):  
Oxygen Consumption ◽  
Exercise Test ◽  
Repeated Measures ◽  
Perceived Exertion ◽  
Intraclass Correlation ◽  
Rating Of Perceived Exertion ◽  
Stroke Rate ◽  
Repeated Measures Design ◽  
Graded Exercise Test ◽  
Graded Exercise

Purpose: To determine the reliability and validity of a power-prescribed on-water (OW) graded exercise test (GXT) for flat-water sprint kayak athletes. Methods: Nine well-trained sprint kayak athletes performed 3 GXTs in a repeated-measures design. The initial GXT was performed on a stationary kayak ergometer in the laboratory (LAB). The subsequent 2 GXTs were performed OW (OW1 and OW2) in an individual kayak. Power output (PWR), stroke rate, blood lactate, heart rate, oxygen consumption, and rating of perceived exertion were measured throughout each test. Results: Both PWR and oxygen consumption showed excellent test–retest reliability between OW1 and OW2 for all 7 stages (intraclass correlation coefficient > .90). The mean results from the 2 OW GXTs (OWAVE) were then compared with LAB, and no differences in oxygen consumption across stages were evident (P ≥ .159). PWR was higher for OWAVE than for LAB in all stages (P ≤ .021) except stage 7 (P = .070). Conversely, stroke rate was lower for OWAVE than for LAB in all stages (P < .010) except stage 2 (P = .120). Conclusions: The OW GXT appears to be a reliable test in well-trained sprint kayak athletes. Given the differences in PWR and stroke rate between the LAB and OW tests, an OW GXT may provide more specific outcomes for OW training.

Comparison of physiological responses to graded exercise test performance in outrigger canoeing

2008 ◽  
Vol 26 (7) ◽  
pp. 743-749 ◽  
Author(s):  
Rebecca M. Kerr ◽  
Warwick Spinks ◽  
Anthony S. Leicht ◽  
Wade Sinclair ◽  
Louise Woodside
Keyword(s):  
Exercise Test ◽  
Test Performance ◽  
Physiological Responses ◽  
Graded Exercise Test ◽  
Graded Exercise

scholarly journals Effect of Cadence on Respiratory Response During Unloaded Cycling in Healthy Individuals

2015 ◽  
Vol 16 (1) ◽  
Author(s):  
Agnieszka D. Jastrzębska ◽  
Marcin Kowalski
Keyword(s):  
Oxygen Consumption ◽  
Aerobic Fitness ◽  
Exercise Test ◽  
Maximal Oxygen Consumption ◽  
Cycle Ergometer ◽  
Healthy Individuals ◽  
Respiratory Response ◽  
Graded Exercise Test ◽  
Graded Exercise ◽  
Healthy Participants

AbstractPurpose. The aim of the study was to establish the respiratory response to unloaded cycling at different cadences. Methods. Eleven healthy participants performed a maximal graded exercise test on a cycle ergometer to assess aerobic fitness (maximal oxygen consumption: 46.27 ± 5.41 ml · min

Validity of a Submaximal 1-Mile Track Jog Test in Predicting VO2max in Fit Teenagers

2000 ◽  
Vol 12 (1) ◽  
pp. 80-90 ◽  
Author(s):  
Brian R. Hunt ◽  
James D. George ◽  
Pat R. Vehrs ◽  
A. Garth Fisher ◽  
Gilbert W. Fellingham
Keyword(s):  
Heart Rate ◽  
Oxygen Consumption ◽  
Cross Validation ◽  
Maximal Oxygen Consumption ◽  
Prediction Equation ◽  
Open Circuit ◽  
Graded Exercise Test ◽  
Graded Exercise ◽  
Specific Prediction ◽  
Maximal Effort

The purpose of this study was to validate the ability of the 1-mile jog test to predict VO2max in fit teenagers. Forty-one males and 42 females performed the steady-state, submaximal jogging test on an indoor track, along with a maximal graded exercise test (GXT) on a treadmill. Open circuit calorimetry was used during the GXT to measure maximal oxygen consumption (VO2max). We generated the following age-specific prediction equation applicable to boys and girls 13–17 years old (n = 83, Radj = .88, SEE = 3.26 ml · kg−1 · min−1): VO2max = 92.91 + 6.50 × gender (0 = female, 1 = male) − 0.141 × body mass (kg) − 1.562 × jog time (min) − 0.125 × heart rate (bpm). Cross-validation results were acceptable (SEEpress = 3.44 ml · kg−1 · min−1). As a field test, the submaximal 1-mile jogging test may alleviate problems associated with pacing, motivation, discouragement, injury, and fatigue that are sometimes associated with maximal effort timed or distance run tests.

Five-Minute Power-Based Test to Predict Maximal Oxygen Consumption in Road Cycling

2021 ◽  
pp. 1-7
Author(s):  
Sebastian Sitko ◽  
Rafel Cirer-Sastre ◽  
Francisco Corbi ◽  
Isaac López-Laval
Keyword(s):  
Oxygen Consumption ◽  
Exercise Test ◽  
Power Output ◽  
Maximal Oxygen Consumption ◽  
Relative Power ◽  
Credibility Interval ◽  
Graded Exercise Test ◽  
Road Cycling ◽  
Graded Exercise ◽  
Using Data

Purpose: To examine the ability of a multivariate model to predict maximal oxygen consumption (VO2max) using performance data from a 5-minute maximal test (5MT). Methods: Forty-six road cyclists (age 38 [9] y, height 177 [9] cm, weight 71.4 [8.6] kg, VO2max 61.13 [9.05] mL/kg/min) completed a graded exercise test to assess VO2max and power output. After a 72-hour rest, they performed a test that included a 5-minute maximal bout. Performance variables in each test were modeled in 2 independent equations, using Bayesian general linear regressions to predict VO2max. Stepwise selection was then used to identify the minimal subset of parameters with the best predictive power for each model. Results: Five-minute relative power output was the best explanatory variable to predict VO2max in the model from the graded exercise test (R2 95% credibility interval, .81–.88) and when using data from the 5MT (R2 95% credibility interval, .61–.77). Accordingly, VO2max could be predicted with a 5MT using the equation VO2max = 16.6 + (8.87 × 5-min relative power output). Conclusions: Road cycling VO2max can be predicted in cyclists through a single-variable equation that includes relative power obtained during a 5MT. Coaches, cyclists, and scientists may benefit from the reduction of laboratory assessments performed on athletes due to this finding.

Juvenile sturgeon exhibit reduced physiological responses to exercise

2001 ◽  
Vol 204 (24) ◽  
pp. 4281-4289
Author(s):  
James D. Kieffer ◽  
Andrea M. Wakefield ◽  
Matthew K. Litvak
Keyword(s):  
Oxygen Consumption ◽  
Fish Species ◽  
Physiological Responses ◽  
Ammonia Excretion ◽  
Exhaustive Exercise ◽  
Shortnose Sturgeon ◽  
Atlantic Sturgeon ◽  
Post Exercise ◽  
Lactate Levels ◽  
Excretion Rates

SUMMARYExperiments were conducted to determine the physiological responses to exercise of Atlantic sturgeon (Acipenser oxyrhynchus) and shortnose sturgeon (A. brevirostrum). We measured the rates of oxygen consumption and ammonia excretion in both species and a variety of physiological parameters in both muscle (e.g. lactate, glycogen, pyruvate, glucose and phosphocreatine concentrations) and blood (e.g. osmolality and lactate concentration) in juvenile shortnose sturgeon following 5 min of exhaustive exercise.In both species, oxygen consumption and ammonia excretion rates increased approximately twofold following exhaustive exercise. Post-exercise oxygen consumption rates decreased to control levels within 30 min in both sturgeon species, but post-exercise ammonia excretion rates remained high in Atlantic sturgeon throughout the 4 h experiment. Resting muscle energy metabolite levels in shortnose sturgeon were similar to those of other fish species, but the levels decreased only slightly following the exercise period and recovery occurred within an hour. Under resting conditions, muscle lactate levels were low (&lt;1 μmol g–1) but they increased to approximately 6 μmol g–1 after exercise, returning to control levels within 6 h. Unlike similarly stressed teleost fish, such as the rainbow trout, plasma lactate levels did not increase substantially and returned to resting levels within 2 h. Plasma osmolality was not significantly affected by exercise in shortnose sturgeon.Taken together, these results suggest that shortnose and Atlantic sturgeon do not exhibit the physiological responses to exhaustive exercise typical of other fish species. They may possess behavioural or endocrinological mechanisms that differ from those of other fishes and that lead to a reduced ability to respond physiologically to exhaustive exercise.

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