Centre for Sport, Exercise and Health Research, Staffordshire University, Stoke-on-Trent, England, UK.
Int J Sports Physiol Perform. 2012 Mar;7(1):19-25. doi: 10.1123/ijspp.7.1.19. Epub 2011 Aug 30.
In rowing ergometry, blood for determining lactate concentration can be removed from the toe tip without the rower having to stop. The purpose of the study was to examine whether sampling blood from the toe versus the earlobe would affect lactate threshold (Tlac) determination.
Ten physically active males (mean ± age 21.2 ± 2.3 y; stature 179.2 ± 7.5 cm; body mass 81.7 ± 12.7 kg) completed a multistage, 3 min incremental protocol on the Concept II rowing ergometer. Blood was sampled simultaneously from the toe tip and earlobe between stages. Three different methods were used to determine Tlac.
There were wider variations due to the method of Tlac determination than due to the sample site; for example, ANOVA results for power output were F(1.25, 11.25) = 11.385, P = .004 for method and F(1, 9) = 0.633, P = .45 for site. The greatest differences in Tlac due to sample site in rowing occurred when Tlac was determined using an increase in blood lactate concentration by >1 mmol/L from baseline (TlacΔ1).
The toe tip can be used as a suitable sample site for blood collection during rowing ergometry, but caution is needed when using the earlobe and toe tip interchangeably to prescribe training intensities based on Tlac, especially when using TlacΔ1 or at lower concentrations of lactate.
在划船测功中，可以从脚趾尖而无需划船者停止的情况下抽取血液以确定乳酸浓度。本研究的目的是检查从脚趾与耳垂取样是否会影响乳酸阈（Tlac）的确定。
10 名身体活跃的男性（平均年龄 21.2 ± 2.3 岁；身高 179.2 ± 7.5cm；体重 81.7 ± 12.7kg）在Concept II 划船测功机上完成了 3 分钟的多阶段递增方案。在每个阶段之间，同时从脚趾尖和耳垂取样。使用三种不同的方法来确定 Tac。
由于 Tac 确定方法的变化比样本位置的变化更大；例如，功率输出的 ANOVA 结果为 F（1.25，11.25）= 11.385，P=.004 用于方法，F（1，9）= 0.633，P=.45 用于位置。在划船中由于样本位置引起的 Tac 最大差异发生在使用基线时血乳酸浓度增加> 1mmol/L（TlacΔ1）来确定 Tac 时。
脚趾尖可以作为划船测功期间血液采集的合适取样部位，但是在耳垂和脚趾尖之间互换使用时需要谨慎，特别是在使用 TacΔ1 或乳酸浓度较低时，基于 Tac 来规定训练强度。
