Sjödin B, Jacobs I
Int J Sports Med. 1981 Feb;2(1):23-6. doi: 10.1055/s-2008-1034579.
This study was designed to examine the interrelationships among endurance running performance (marathon), the exercise intensity at which the "onset of blood lactate accumulation" (OBLA) occurs training volume, and muscle fiber characteristics. In conjunction with Stockholm's Marathon (1979), 18 male subjects underwent a test to determine the relationship between treadmill running velocity and blood lactate accumulation. The velocity at which a blood lactate accumulation of 4 mmol x l-1 occurred was referred to as the VOBLA. The m. vastus lateralis was biopsied and muscle fiber type distribution (% slow twitch, ST) and capillary density determined. With marathon running velocity (VM) as the dependent variable, multiple regression analysis showed that VOBLA accounted for 92% of the variation in VM, and VOBLA plus training volume prior to the marathon accounted for 96% of this variation. All performance variables were positively correlated to % ST muscle fiber distribution (r = 0.55-0.69) and capillary density (r = 052-0.63). Thus, marathon running performance was closely related to VOBLA and to the ability to run at a pace close to that velocity during the race. These properties were in turn related to % ST, capillary density, and training volume.
本研究旨在探讨耐力跑表现（马拉松）、“血乳酸堆积起始点”（OBLA）出现时的运动强度、训练量和肌纤维特征之间的相互关系。在1979年斯德哥尔摩马拉松赛期间，18名男性受试者接受了一项测试，以确定跑步机跑步速度与血乳酸堆积之间的关系。血乳酸浓度达到4 mmol×l-1时的速度被称为VOBLA。对股外侧肌进行活检，测定肌纤维类型分布（慢肌纤维百分比，ST）和毛细血管密度。以马拉松跑步速度（VM）作为因变量，多元回归分析表明，VOBLA占VM变化的92%，VOBLA加上马拉松赛前的训练量占该变化的96%。所有表现变量均与ST肌纤维分布百分比（r = 0.55 - 0.69）和毛细血管密度（r = 0.52 - 0.63）呈正相关。因此，马拉松跑步表现与VOBLA以及在比赛中以接近该速度的配速跑步的能力密切相关。这些特性又与ST百分比、毛细血管密度和训练量有关。
