Bret C, Messonnier L, Nouck Nouck J M, Freund H, Dufour A B, Lacour J R
Laboratoire de Physiologie de l'Exercice, GIP Exercice - EA 645, Faculté de Médecine Lyon-Sud, Chemin du petit Revoyet BP 12, 69 921 Oullins Cedex, France.
Int J Sports Med. 2003 Feb;24(2):108-13. doi: 10.1055/s-2003-38201.
The purpose of this study was to investigate whether track running specialisation could be associated with differences in the ability to exchange and remove lactate. Thirty-four male high-level runners were divided into two groups according to their specialty (100 - 400 m/800 - 1500 m). All performed a 1-min 25.2 km x h -1 event, followed by a 90-min passive recovery to obtain individual blood lactate recovery curves which were fitted to a bi-exponential time function: La = La + A 1 (1-e -gamma1t) + A 2 (1-e -gamma2t). The velocity constant gamma 1 which denotes the ability to exchange lactate between the previously worked muscles and blood was higher (p < 0.001) in middle-distance runners than in sprint runners. The velocity constant gamma 2 which reflects the overall ability to remove lactate did not differ significantly between the two groups. gamma 1 was positively correlated with the best performance over 800 m achieved by 16 athletes during the outdoor track season following the protocol (r = 0.55, p < 0.05). In conclusion, the lactate exchange ability seems to play a role on the athlete's capacity to sustain exercise close to 2-min-duration and specifically to run 800 m.
本研究的目的是调查径赛专项化是否与乳酸交换和清除能力的差异有关。34名男性高水平跑步运动员根据其专项（100 - 400米/800 - 1500米）分为两组。所有人都进行了一次速度为25.2千米/小时的1分钟运动，随后进行90分钟的被动恢复，以获得个体血乳酸恢复曲线，该曲线拟合为双指数时间函数：La = La + A 1 (1 - e -gamma1t) + A 2 (1 - e -gamma2t)。表示先前工作肌肉与血液之间乳酸交换能力的速度常数gamma 1在中距离跑运动员中高于短跑运动员（p < 0.001）。反映乳酸总体清除能力的速度常数gamma 2在两组之间没有显著差异。gamma 1与16名运动员在按照该方案进行的室外径赛赛季中800米的最佳成绩呈正相关（r = 0.55，p < 0.05）。总之，乳酸交换能力似乎对运动员维持接近2分钟时长运动的能力，特别是跑800米的能力有影响。
