School of Sciences and Physical Education, University of Canterbury, Christchurch, New Zealand.
Int J Sports Med. 2011 Jun;32(6):428-32. doi: 10.1055/s-0031-1271712. Epub 2011 Mar 4.
Comparisons of capillary blood lactate concentrations pre and post climb have featured in the protocols of many rock climbing studies, with most researchers obtaining samples from the fingertip. The nature of rock climbing, however, places a comparatively high physiological loading on the foreaand fingertips. Indeed, the fingertips are continually required for gripping and this makes pre-climb sampling at this site problematic. The purpose of our study was to examine differences in capillary blood lactate concentrations from samples taken at the fingertip and first (big) toe in a rock climbing context. 10 participants (9 males and 1 female) completed climbing bouts at 3 different angles (91°, 100° and 110°). Capillary blood samples were taken simultaneously from the fingertip and first toe pre and post climb. A limit of agreement plot revealed all data points to be well within the upper and lower bounds of the 95% population confidence interval. Subsequent regression analysis revealed a strong relationship (R (2)=0.94, y=0.940x + 0.208) between fingertip and first toe capillary blood lactate concentrations. Findings from our study suggest that the toe offers a valid alternative site for capillary blood lactate concentration analysis in a rock climbing context.
比较毛细血管血乳酸浓度预攀登和攀登后一直是许多攀岩研究方案的特色，大多数研究人员从指尖获取样本。然而，攀岩的性质对前臂和指尖施加了相对较高的生理负荷。事实上，指尖需要持续抓握，这使得在该部位进行预攀登采样成为一个问题。我们研究的目的是在攀岩环境中检查指尖和第一（大）脚趾处采集的毛细血管血乳酸浓度的差异。10 名参与者（9 名男性和 1 名女性）完成了 3 种不同角度（91°、100°和 110°）的攀登。在攀登前后，同时从指尖和第一脚趾采集毛细血管血样。一致性界限图显示所有数据点都在 95%人群置信区间的上限和下限内。随后的回归分析显示指尖和第一脚趾毛细血管血乳酸浓度之间存在很强的关系（R²=0.94，y=0.940x+0.208）。我们的研究结果表明，在攀岩环境中，脚趾为毛细血管血乳酸浓度分析提供了一个有效的替代部位。
