A comparison of lactate concentration in plasma collected from the toe, ear, and fingertip after a simulated rowing exercise
A comparison of lactate concentration in plasma collected from the toe, ear, and fingertip after a simulated rowing exercise
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DOI：
10.1136/bjsm.34.1.35
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发表时间：
2000-02-01
影响因子：
18.4
通讯作者：
Farrally, MR
中科院分区：
文献类型：
--
作者：
Forsyth, JJ;Farrally, MR
目的：探讨用足趾采血测定赛艇运动员血浆乳酸浓度的有效性。为了达到这一目的，将这些值与指尖和耳垂的值进行比较。方法：9名受试者在Concept II划船测力仪上以两种不同的次最大负荷进行锻炼。每次持续4分钟的负荷引起的平均（SD）心率反应为160.1（8.5）和180.1（5.7）次/分，对应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抽血，分析血浆乳酸浓度。结果：在估计心脏命运最大值的76.4%时，指尖、脚趾和耳垂的平均血浆乳酸浓度（SD）分别为6.36（1.58）、5.81（1.11）和5.29 (1.24)mmol/l。在估计心率最大值的91.9%时，分别为8.81（2.30）、8.53（1.37）和8.41 (2.35)mmol/l。两种工作强度下各部位间无显著差异（p < 0.05）。结论：在划船过程中，脚趾可能为评估乳酸浓度提供了一种实用的替代方法，其优点是可以在不中断划船运动的情况下提取重复的血液样本。
Objective-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.Methods-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.Results-At 76.4% of estimated heart fate 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.Conclusions-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.