Physiological And Performance Comparisons Between A Simulated Time Trial And The Respiratory Compensation Point In Well-Trained Cyclists

This study evaluated the physiological and performance values from a simulated 576 kj (~20 km) time trial (TT) in comparison to the values at the respiratory compensation point (RCP) from a GXT. Eight (female n=1) well-trained cyclists [VO sub(2max): 62.3+ or -7.16 ml super(.)kg super(.) super(-1) super(.)min super(-1 ), maximal power (W sub(max)): 374+ or -54.5 W, BMI: 23.5+ or -4.5 kg super(.)(m super(2)) super(-1), Age: 32.8+ or -7.5 years] served as volunteer participants for this investigation. Each volunteer first underwent a GXT on a cycle ergometer to exhaustion beginning at 70 W (female=50 W) and increasing at a rate of 35 W super(.)min super(-1) (female=25 W super(.)min super(-1)) to determine RCP and VO sub(2max). RCP values were; HR (178+ or -8.32 bpm), power (317+ or -47.2 W, 85% of W sub(max)), RER (1.07+ or -0.06), Ve (100+ or -19.2 l super(.)min super(-1)) and VO sub(2) (3.81+ or -0.56 l super(.)min super(-1), 91% of VO sub(2max)). No significant difference was found over the course of the TT for any variable (p>0.05).