Maximal heart rates and plasma lactate concentrations observed in middle-aged men and women during a maximal cycle ergometer test

1993 ◽  
Vol 66 (3) ◽  
pp. 281-284 ◽  
Author(s):  
A. M. P. M. Bovens ◽  
M. A. van Baak ◽  
J. G. P. M. Vrencken ◽  
J. A. G. Wijnen ◽  
F. T. J. Verstappen
Keyword(s):  
Cycle Ergometer ◽  
Plasma Lactate ◽  
Middle Aged ◽  
Men And Women ◽  
Heart Rates ◽  
Cycle Ergometer Test ◽  
Ergometer Test ◽  
Maximal Cycle

scholarly journals Reliability of a Progressive Maximal Cycle Ergometer Test to Assess Peak Oxygen Uptake in Children With Mild to Moderate Cerebral Palsy

2014 ◽  
Vol 94 (1) ◽  
pp. 121-128 ◽  
Author(s):  
Merel-Anne Brehm ◽  
Astrid C.J. Balemans ◽  
Jules G. Becher ◽  
Annet J. Dallmeijer
Keyword(s):  
Cerebral Palsy ◽  
Oxygen Uptake ◽  
Cardiorespiratory Fitness ◽  
Peak Oxygen Uptake ◽  
Cycle Ergometer ◽  
Small Sample ◽  
Cycle Ergometer Test ◽  
Ergometer Test ◽  
Maximal Cycle ◽  
Gmfcs Level

BackgroundRehabilitation research in children with cerebral palsy (CP) is increasingly addressing cardiorespiratory fitness testing. However, evidence on the reliability of peak oxygen uptake (V̇o2peak) measurements, considered the best indicator of aerobic fitness, is not available in this population.ObjectiveThe objective of this study was to establish the reliability of a progressive maximal cycle ergometer test when assessing V̇o2peak in children with mild to moderate CP.DesignRepeated measures were used to assess test-retest reliability.MethodsEligible participants were ambulant, 6 to 14 years of age, and classified as level I, II, or III according to the Gross Motor Function Classification System (GMFCS). Two progressive maximal cycle ergometer tests were conducted (separated by 3 weeks), with the workload increasing every minute in steps of 3 to 11 W, dependent on height and GMFCS level. Reliability was determined by means of the intraclass correlation coefficient (ICC [2,1]) and smallest detectable change (SDC).ResultsTwenty-one children participated (GMFCS I: n=4; GMFCS II: n=12; and GMFCS III: n=5). Sixteen of them (9 boys, 7 girls; GMFCS I: n=3; GMFCS II: n=11; and GMFCS III: n=2) performed 2 successful tests, separated by 9.5 days on average. Reliability for V̇o2peak was excellent (ICC=.94, 95% confidence interval=.83–.98). The SDC was 5.72 mL/kg/min, reflecting 14.6% of the mean.LimitationsThe small sample size did not allow separate analysis of reliability per GMFCS level.ConclusionsIn children with CP of GMFCS levels I and II, a progressive maximal cycle ergometer test to assess V̇o2peak is reliable and has the potential to detect change in cardiorespiratory fitness over time. Further study is needed to establish the reliability of V̇o2peak in children of GMFCS level III.

The 12-Minute Stationary Cycle Ergometer Test: An Efficacious VO2peak Prediction Test for the Injured

1993 ◽  
Vol 2 (3) ◽  
pp. 189-195 ◽  
Author(s):  
Paul M. Vanderburgh
Keyword(s):  
High Intensity ◽  
Cycle Ergometer ◽  
Open Circuit ◽  
Physically Active ◽  
Men And Women ◽  
College Age ◽  
Cycle Ergometer Test ◽  
Prediction Test ◽  
Gender Based ◽  
Ergometer Test

Previously there existed no efficacious maximal effort, VO2peak prediction test for subjects who, because of injury, can exercise at high intensity only on a device such as a cycle ergometer. This study's purpose was to develop and validate such a test, a 12-Minute Stationary Cycle Ergometer Test (12MSCET), for college-age physically active men and women. For 60 college-age men and women, and a gender-based resistance setting, the total work done on the 12MSCET and body weight were found to be highly predictive of VO2peak, measured via open circuit spirometry. Furthermore, the torques required for such a test are, for this sample, approximately 50% of those required in other predictive protocols. To date, the 12MSCET has been used for VO2peak assessment of over 300 military cadets who, because of injury, found cycling their only efficacious high-intensity aerobic modality.

Effect of beta-blockade on the drift in O2 consumption during prolonged exercise

1988 ◽  
Vol 64 (2) ◽  
pp. 753-758 ◽  
Author(s):  
J. K. Kalis ◽  
B. J. Freund ◽  
M. J. Joyner ◽  
S. M. Jilka ◽  
J. Nittolo ◽  
...  
Keyword(s):  
Heart Rate ◽  
Minute Ventilation ◽  
Cycle Ergometer ◽  
Beta Blockade ◽  
Adrenergic Blockade ◽  
Maximal Heart Rate ◽  
O2 Consumption ◽  
Double Blind ◽  
Cycle Ergometer Test ◽  
Ergometer Test

The effect of beta-adrenergic blockade on the drift in O2 consumption (VO2 drift) typically observed during prolonged constant-rate exercise was studied in 14 healthy males in moderate heat at 40% of maximal O2 consumption (VO2max). After an initial maximum cycle ergometer test to determine the subjects' control VO2max, subjects were administered each of three medications: placebo, atenolol (100 mg once daily), and propranolol (80 mg twice daily), in a randomized double-blind fashion. Each medication period was 5 days in length and was followed by a 4-day washout period. On the 3rd day of each medication period, subjects performed a maximal cycle ergometer test. On the final day of each medication period, subjects exercised at 40% of their control VO2max for 90 min on a cycle ergometer in a warm (31.7 +/- 0.3 degrees C) moderately humid (44.7 +/- 4.7%) environment. beta-Blockade caused significant (P less than 0.05) reductions in VO2max, maximal minute ventilation (VEmax), maximal heart rate (HRmax), and maximal exercise time. Significantly greater decreases in VO2max, VEmax, and HRmax were associated with the propranolol compared with the atenolol treatment. During the 90-min submaximal rides, beta-blockade significantly reduced heart rate. Substantially lower values for O2 consumption (VO2) and minute ventilation (VE) were observed with propranolol compared with atenolol or placebo. Furthermore, VO2 drift and HR drift were observed under atenolol and placebo conditions but not with propranolol. Respiratory exchange ratio decreased significantly over time during the placebo and atenolol trials but did not change during the propranolol trial.(ABSTRACT TRUNCATED AT 250 WORDS)

The 10-min Cycle Ergometer Test

1998 ◽  
Vol 12 (1) ◽  
pp. 12-17
Author(s):  
Paul M. Vanderburgh ◽  
Greg Daniels ◽  
Todd A. Crowder ◽  
Tony Lachowetz ◽  
Robb Elliott
Keyword(s):  
Cycle Ergometer ◽  
Cycle Ergometer Test ◽  
Ergometer Test

A Clinical Method for Estimation of VO2max Using Seismocardiography

2020 ◽  
Vol 41 (10) ◽  
pp. 661-668
Author(s):  
Kasper Sørensen ◽  
Mathias Krogh Poulsen ◽  
Dan Stieper Karbing ◽  
Peter Søgaard ◽  
Johannes Jan Struijk ◽  
...  
Keyword(s):  
Prediction Model ◽  
Cardiorespiratory Fitness ◽  
Demographic Data ◽  
Cycle Ergometer ◽  
Accurate Estimation ◽  
Clinical Method ◽  
Cycle Ergometer Test ◽  
Aortic Valve Closure ◽  
Proposed Model ◽  
Ergometer Test

AbstractThe purpose of this study was to investigate the correlation between the seismocardiogram and cardiorespiratory fitness. Cardiorespiratory fitness can be estimated as VO2max using non-exercise algorithms, but the results can be inaccurate. Healthy subjects were recruited for this study. Seismocardiogram and electrocardiogram were recorded at rest. VO2max was measured during a maximal effort cycle ergometer test. Amplitudes and timing intervals were extracted from the seismocardiogram and used in combination with demographic data in a non-exercise prediction model for VO2max. 26 subjects were included, 17 females. Mean age: 38.3±9.1 years. The amplitude following the aortic valve closure derived from the seismocardiogram had a significant correlation of 0.80 (p<0.001) to VO2max. This feature combined with age, sex and BMI in the prediction model, yields a correlation to VO2max of 0.90 (p<0.001, 95% CI: 0.83–0.94) and a standard error of the estimate of 3.21 mL·kg−1·min−1 . The seismocardiogram carries information about the cardiorespiratory fitness. When comparing to other non-exercise models the proposed model performs better, even after cross validation. The model is limited when tracking changes in VO2max. The method could be used in the clinic for a more accurate estimation of VO2max compared to current non-exercise methods.

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