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Background: Low intensity, steady state cardiopulmonary exercise testing (CPX) is more comfortable especially for critical ill patients. It was postulated that steady state oxygen uptake kinetics might predict peak exercise capacity. Objective: Can peak exercise performance be predicted by VO2 uptake kinetics from low intensity exercise testing? Methods: 600 Patients (P)(56±14 yrs; 190 female; EF 58±20%) were exercise tested on a treadmill using the symptom limited peak exercise Ramping Incremental Exercise Protocol (RITE) and the Low Intensity Treadmil Exercise (LITE) 35W steady state protocol. Results: Workrate (WR) 167±84 W, VO2 peak 22±7 ml/kg, VE/VCO2 peak 34±7, HR peak 130±26 bpm, Mean response time for VO2 (MRT)51±20s , VO2 deficit 5,5±2,5 ml/kg, VO2 steady state 10,6±2,6 ml/kg. Correlation of peak to low intensity parameters are shown in the table. Conclusion: Peak exercise parameters did not correlate with low intensity steady state Parameters. Peak exercise performance cannot be predicted by low intensity CPX exercise testing O2 uptake kinetics. | R-Values | MRT [s] | VO2 deficit [ml] | VO2 steady state [ml] | | VO2 peak [ml/kg] | 0,33 | 0,20 | 0,09 | | Workrate [W] | 0,31 | 0,21 | 0,14 | | VE/VCO2 | 0,17 | 0,17 | 0,20 | | EF [%] | 0,17 | 0,08 | 0,05 |
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