Abstract des Autors

This study compared the physiological responses of simulated kayaking on a K1 ERGO kayak ergometer with open water paddling. Nine well-trained male kayakers (VO2peak 4.27+/-0.58 L/min, age 24+/-4 yr, mass 77.3+/-6.4 kg, height 179.5+/-5.3 cm; (mean+/-SD)) performed two 4min exercise bouts on open water (OW) and on an air braked kayak ergometer (Erg). During exercise, expired air and heart rate (HR) were continuously measured. The distance covered during OW (992+/-47.1 m) was highly correlated (r**2=0.86) with the total work performed in Erg (47.64+/-7.67 kj). There were no differences between trials for oxygen uptake, carbon dioxide production or estimated carbohydrate oxidation. However, during OW, minute ventilation was significantly higher at 60 and 90s (104.2+/-16.4 vs. 92.6+/-20.4 L/min and 120.5+/-15.8 vs. 111.7+/-17.6 L/min for 60 and 90s, respectively, p<0.05), and HR was higher in OW during the first minute (120+/-20 vs. 104+/-19 beats/min, 164+/-8 vs. 147+/-18 beats/min and 178+/-6 vs. 170+/-7 beats/min for 0. 30, and 60 s, respectively, p<0.05). There were no differences in peak VO2 between OW and Erg (4.10+/-0.49 vs. 4.09+/-0.53 L/min, respectively) nor in post-exercise blood (lactate) (6.43+/-1.47 vs. 6.59+/-0.99 mmol/L, respectively). We conclude that the K1 ERGO accurately simulates the physiological demands of short-term, high-intensity kayaking. Verf.-Referat