Estimation of Energy Expenditure in Healthy Adults From the YMCA Submaximal Cycle Ergometer Test

2007 ◽  
Vol 30 (2) ◽  
pp. 138-149 ◽  
Author(s):  
Nuria Garatachea ◽  
Euclides Cavalcanti ◽  
David García-López ◽  
Javier González-Gallego ◽  
Jose A. de Paz
Keyword(s):  
Energy Expenditure ◽  
Cycle Ergometer ◽  
Healthy Adults ◽  
Cycle Ergometer Test ◽  
Ergometer Test

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.

Cross-validation of the Air Force Cycle Ergometer Test with Maximal Treadmill Testing

2004 ◽  
Vol 36 (Supplement) ◽  
pp. S118
Author(s):  
Shannon Crumpton ◽  
Henry Williford ◽  
Michele Scharff-Olson ◽  
Shawn OʼMailia ◽  
Elese Woollen ◽  
...  
Keyword(s):  
Air Force ◽  
Cross Validation ◽  
Cycle Ergometer ◽  
Cycle Ergometer Test ◽  
Treadmill Testing ◽  
Ergometer Test

Cross-validation of the Air Force Cycle Ergometer Test with Maximal Treadmill Testing

2004 ◽  
Vol 36 (Supplement) ◽  
pp. S118
Author(s):  
Shannon Crumpton ◽  
Henry Williford ◽  
Michele Scharff-Olson ◽  
Shawn O??Mailia ◽  
Elese Woollen ◽  
...  
Keyword(s):  
Air Force ◽  
Cross Validation ◽  
Cycle Ergometer ◽  
Cycle Ergometer Test ◽  
Treadmill Testing ◽  
Ergometer Test

Endurance training alters basal erythrocyte MCT-1 contents and affects the lactate distribution between plasma and red blood cells in T2DM men following maximal exercise

2015 ◽  
Vol 93 (6) ◽  
pp. 413-419 ◽  
Author(s):  
David Opitz ◽  
Edward Lenzen ◽  
Andreas Opiolka ◽  
Melanie Redmann ◽  
Martin Hellmich ◽  
...  
Keyword(s):  
Endurance Training ◽  
Acute Exercise ◽  
Maximal Exercise ◽  
Cycle Ergometer ◽  
Monocarboxylate Transporter ◽  
Acute Bout ◽  
Cycle Ergometer Test ◽  
Lactate Levels ◽  
Ergometer Test

Chronic elevated lactate levels are associated with insulin resistance in patients with type 2 diabetes mellitus (T2DM). Furthermore, lactacidosis plays a role in limiting physical performance. Erythrocytes, which take up lactate via monocarboxylate transporter (MCT) proteins, may help transport lactate within the blood from lactate-producing to lactate-consuming organs. This study investigates whether cycling endurance training (3 times/week for 3 months) alters the basal erythrocyte content of MCT-1, and whether it affects lactate distribution kinetics in the blood of T2DM men (n = 10, years = 61 ± 9, body mass index = 31 ± 3 kg/m2) following maximal exercise (WHO step-incremental cycle ergometer test). Immunohistochemical staining indicated that basal erythrocyte contents of MCT-1 protein were up-regulated (+90%, P = 0.011) post-training. Erythrocyte and plasma lactate increased from before acute exercise (= resting values) to physical exhaustion pre- as well as post-training (pre-training: +309%, P = 0.004; +360%, P < 0.001; post-training: +318%, P = 0.008; +300%, P < 0.001), and did not significantly decrease during 5 min recovery. The lactate ratio (erythrocytes:plasma) remained unchanged after acute exercise pre-training, but was significantly increased after 5 min recovery post-training (compared with the resting value) (+22%, P = 0.022). The results suggest an increased time-delayed influx of lactate into erythrocytes following an acute bout of exercise in endurance-trained diabetic men.

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