Rowing is a strength-endurance type of sport and competition performance depends on factors such as aerobic and anaerobic metabolism. Energy cost during all-out effort in water has not clearly reported. The purpose of this study was to determine the relative contribution of VO2max during simulated a 2000m race. Twenty-five rowers (height 182.23 ± 1.50 cm; weight 77.93 ± 1.42 Kg; age 20.50 ± 1.3 years; training age 5.07 ± 1.24 years) per-formed an incremental exercise test to determine the maximal oxygen uptake (VO2max), and a 2000 metre "all-out" test to evaluate performance indices. The results revealed high contribution of the VO2max during the simu-lated race and reached 88.67% for absolute and 88.56% for relative values of VO2max. Aerobic power was signifi-cantly lower during the simulated race compared to the incremental test, both in absolute (4389.57 ± 84.87 vs 4951 ± 46.81 ml•min-1) and relative values (56.32 ± 0.34 vs 63.60 ± 1.97 ml•kg-1•min-1). Heart rate was signifi-cantly higher during the simulated race compared with the incremental test 202.50 ± 2.02 vs 196.93 ± 1.13b•min-1). Dyspnea index and breathing frequency were also significantly higher during the simulated race compared with the incremental test (1.12 ± 0.03 vs 0.94 ± 0.02; 70.14 ± 1.64 vs 61.79 ± 2.62 b•min-1). Blood lactate concentra-tion was also significantly higher during the 2000m all-out test compared to the incremental test (15.27 ± 0.64 vs 11.70 ± 0.32 mmol•lt-1). In conclusion the present findings support the notion that aerobic metabolism has high contribution a during simulated 2000m race (>88% of VO2max) compared to the anaerobic metabolism.
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