Loures JP, Ferreira HR, Oliveira RMR, Gill P, Fernandes LC. Correlations between Performance and 4-Min Maximum Efforts in Olympic Kayaking Athletes. JEPonline 2014;17(4)34-41. The aim of this study was to investigate the VO2 peak, lactate concentration, and force responses after a maximum 4-min effort on specialized ergometers and the possible relationship of these responses with performance in a 1000 m race. The study consisted of 28 elite kayakers divided into two groups: (a) 21 males, 21.25 ± 5.71 yrs, 173.50 ± 8.50 cm, 69.93 ± 10.36 kg; and (b) 7 females, 21.57 ± 6.17 yrs, 172.81 ± 9.27 cm, 68.90 ± 11.50 kg). All subjects performed a 4-min maximal effort while VO2 peak values were verified both prior to and after the exercise along with the collection of 25 μL of blood from the earlobe for analysis of lactate [Lac]. Performance was observed 72 hrs later in a 1000 m race in an individual Olympic kayak (K1). Pearson correlation was used for possible associations between VO2 peak, [Lac] peak, the parameters of the force-time curve and the performance in the K1 1000 m. Results revealed that of all the parameters analyzed, only the fatigue index (FI), which was observed from the force-time curve data, showed a significant correlation (r = 0.46). Thus, based on these results we conclude that in K1 1000 m races the kayakers who tend to maintain the distribution of force peaks during the race appear to have a greater chance of success.
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