Abstract des Autors

Twelve male, elite kayakers participated in the study. Five of them specialised in short distances (200 and 500 m; Group I), and 7 in long distances (1000 and 10.000 m; Group II). All subjects underwent 40 s all-out arm cranking exercise on Monark ergometer adapted for arm work. Before exercise as well as at once and 1, 3 and 30 min after its cessation, blood was sampled from fingertips for standard base deficit, pH, lactate and plasma inorganic phosphate (Pi) determinations. Subjects from both groups were alike regarding their age, anthropometric characteristics, training experience and aerobic capacity. However, both peak and mean relative power outputs in Group I were significantly higher than in Group II (by 10.6 and 7.8%, respectively). Post-exercise blood lactate concentration in Group I at each time point was significantly higher than in Group II, the difference at 3 min post-exercise being highest (17.5%). Blood pH was lower and standard base deficit higher in Group I than in Group II. Both groups differed regarding the time pattern of net changes in plasma Pi levels: peak increase in Group I was noted 1 min post-exercise and in Group II - 3 min post-exercise. Elite kayakers were found to differ significantly in their anaerobic capacity due to distance specialisation despite a similar aerobic capacity and an identical training program. Verf.-Referat