Forsyth J J, Farrally M R
North East Wales Institute, Wrexham, Wales, United Kingdom.
Br J Sports Med. 2000 Feb;34(1):35-8. doi: 10.1136/bjsm.34.1.35.
To examine the validity of using blood taken from the toe for the assessment of plasma lactate concentration in rowers. To achieve this, values were compared with those taken from the fingertip and earlobe.
Nine subjects exercised at two separate submaximum workloads on the Concept II rowing ergometer. The loads, each lasting four minutes, elicited mean (SD) heart rate responses of 160.1 (8.5) and 180.1 (5.7) beats/min, which corresponded to 76.4 (6.1)% and 91.9 (4.7)% of the estimated heart rate maximum of the subjects. Blood was simultaneously removed after the cessation of exercise by three experimenters and was analysed for plasma lactate concentration.
At 76.4% of estimated heart rate maximum, the mean (SD) plasma lactate concentrations sampled from the fingertip, toe, and earlobe were 6.36 (1.58), 5.81 (1.11), and 5.29 (1.24) mmol/l respectively. At 91.9% of estimated heart rate maximum, respective values were 8.81 (2.30), 8.53 (1.37), and 8.41 (2.35) mmol/l. No significant differences (p > 0.05) were found between any of the sites at either work intensity.
The toe may offer a practical alternative for assessing the concentration of lactate during rowing, having the advantage that repeated blood samples can be removed without interruption of the rowing action.
检验采集脚趾血液用于评估赛艇运动员血浆乳酸浓度的有效性。为此，将所得数值与从指尖和耳垂采集血液所得数值进行比较。
9名受试者在Concept II赛艇测功仪上以两个不同的次最大负荷进行运动。每个负荷持续4分钟，平均（标准差）心率反应分别为160.1（8.5）次/分钟和180.1（5.7）次/分钟，分别相当于受试者估计最大心率的76.4（6.1）%和91.9（4.7）%。运动停止后，由三名实验人员同时采集血液，并分析血浆乳酸浓度。
在估计最大心率的76.4%时，从指尖、脚趾和耳垂采集的血浆乳酸浓度平均（标准差）分别为6.36（1.58）、5.81（1.11）和5.29（1.24）mmol/L。在估计最大心率的91.9%时，相应数值分别为8.81（2.30）、8.53（1.37）和8.41（2.35）mmol/L。在任一工作强度下，各部位之间均未发现显著差异（p>0.05）。
脚趾可作为评估赛艇运动中乳酸浓度的一种实用替代方法，其优点是可以在不中断划桨动作的情况下反复采集血样。
