Relationship between optimal lactate removal power output and Olympic triathlon performance. J. Strength Cond. Res. 21(4):1160-1165. 2007.-To investigate the relationships between race performance and parameters at the optimal power output for lactate removal, 10 male triathletes were examined. Exercise intensities for lactate removal were defined by calculating 50% of difference (⌬T) between running velocity (V r ) at individual anaerobic threshold (IAT) and at individual ventilatory threshold (IVT), then choosing 3 V r : at IVT plus 50% ⌬T (IVT ϩ50%⌬T ), at IVT, and at IVT minus 50% ⌬T (IVT Ϫ50%⌬T ). After a 6-minute treadmill run at 75% of difference between IAT and V O 2 max, all triathletes performed a 30-minute active recovery run at IVT ϩ50%⌬T , IVT, and IVT Ϫ50%⌬T . Capillary blood lactate was determined at 1, 3,6,9,12,15,20,25, and 30 minutes of recovery. The IVT Ϫ50%⌬T recovery was the most efficient V r for lactate removal. Running velocities at IVT and IVT Ϫ50%⌬T were highly (p Ͻ 0.01) related to cycle, run, and overall race time. V O 2 values at IAT, IVT ϩ50%⌬T , and IVT were less (p Ͻ 0.05) related to split and overall race time. The variable most related to overall race time, as determined by stepwise multiple linear regression analysis, was the V r at IVT Ϫ50%⌬T (r ϭ 0.87, p ϭ 0.001). The R 2 value of 0.76 indicated that V r at IVT Ϫ50%⌬T could account for 76% of the variance in triathlon race time. This study shows that the race performances of triathletes are highly related to the V r at which the most efficient lactate removal (IVT Ϫ50%⌬T ) occurs. These findings suggest that the assessment of V r at IVT and IAT (from which V r at IVT Ϫ50%⌬T are calculated) may be a useful method for monitoring training-induced adaptations and performance improvements in athletes who participate in Olympic triathlons.
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