Castagna Carlo, Abt Grant, D'Ottavio Stefano
Italian Soccer Federation (FIGC), Rome, Italy.
J Strength Cond Res. 2002 Nov;16(4):623-7.
The aim of this study was to examine the relationship between selected blood lactate thresholds and competitive match activities in elite soccer referees. Eight elite-level referees (mean age, 37.6 +/- 3.4 years) were each observed during 2 Serie A matches (n = 16), and the mean of each match activity was used for analysis. Match activities were monitored using a technology similar to that reported by Ohashi and others. Blood lactate thresholds were assessed under field conditions during a progressive multistage protocol. Running velocities attained at selected blood lactate concentrations (2 and 4 mmol x L(-1), V2 and V4, respectively) were chosen because these are commonly used to assess endurance performance. Analyses of correlations were performed considering V2 and V4 values as independent variables and total distance, maximal velocity distance (runs performed at velocities faster than 24 km x h(-1)) and high-intensity activity distance (runs performed at velocities faster than 18 km x h(-1)) as dependent variables. Significance was set at p </= 0.05 for all measurements. The V2 and V4 values were 10.9 +/- 1.8 km x h(-1) and 13.6 +/- 1.4 km x h(-1) (10.5-15.0), respectively. Mean peak-lactate corresponded to 9.4 +/- 1.6 mmol x L(-1). The V4 value correlated moderately with the total distance covered during the match (r = 0.73, p < 0.05). The results demonstrate the positive relationship of the running velocity attained at a blood lactate concentration of 4 mmol x L(-1) to the total amount of distance covered by a referee during a match.
本研究旨在探讨精英足球裁判选定的血乳酸阈值与比赛竞技活动之间的关系。对8名精英级裁判（平均年龄37.6±3.4岁）在2场意甲比赛（n = 16）中进行观察，每场比赛活动的均值用于分析。使用与大桥等人报告的类似技术监测比赛活动。在现场条件下，通过渐进式多级方案评估血乳酸阈值。选择在选定血乳酸浓度（分别为2和4 mmol·L⁻¹，即V2和V4）时达到的跑步速度，因为这些常用于评估耐力表现。以V2和V4值作为自变量，总距离、最大速度距离（速度超过24 km·h⁻¹时的跑步距离）和高强度活动距离（速度超过18 km·h⁻¹时的跑步距离）作为因变量进行相关性分析。所有测量的显著性设定为p≤0.05。V2和V4值分别为10.9±1.8 km·h⁻¹和13.6±1.4 km·h⁻¹（10.5 - 15.0）。平均峰值乳酸对应于9.4±1.6 mmol·L⁻¹。V4值与比赛期间覆盖的总距离中度相关（r = 0.73，p < 0.05）。结果表明，在血乳酸浓度为4 mmol·L⁻¹时达到的跑步速度与裁判在比赛期间覆盖的总距离之间存在正相关关系。
