Edith Cowan University, School of Exercise, Biomedical and Health Sciences, Joondalup, Western Australia, Australia.
J Biomed Opt. 2010 Jan-Feb;15(1):017008. doi: 10.1117/1.3309746.
We examine the test-retest reliability of biceps brachii tissue oxygenation index (TOI) parameters measured by near-infrared spectroscopy during a 10-s sustained and a 30-repeated (1-s contraction, 1-s relaxation) isometric contraction task at 30% of maximal voluntary contraction (30% MVC) and maximal (100% MVC) intensities. Eight healthy men (23 to 33 yr) were tested on three sessions separated by 3 h and 24 h, and the within-subject reliability of torque and each TOI parameter were determined by Bland-Altman+/-2 SD limits of agreement plots and coefficient of variation (CV). No significant (P>0.05) differences between the three sessions were found for mean values of torque and TOI parameters during the sustained and repeated tasks at both contraction intensities. All TOI parameters were within+/-2 SD limits of agreement. The CVs for torque integral were similar between the sustained and repeated task at both intensities (4 to 7%); however, the CVs for TOI parameters during the sustained and repeated task were lower for 100% MVC (7 to 11%) than for 30% MVC (22 to 36%). It is concluded that the reliability of the biceps brachii NIRS parameters during both sustained and repeated isometric contraction tasks is acceptable.
我们检查了在 30%最大自主收缩 (30% MVC) 和最大 (100% MVC) 强度下，近红外光谱法测量的肱二头肌组织氧合指数 (TOI) 参数在 10 秒持续和 30 次重复 (1 秒收缩，1 秒放松) 等长收缩任务中的测试 - 再测试可靠性。8 名健康男性 (23 至 33 岁) 在 3 小时和 24 小时的 3 次测试中进行了测试，通过 Bland-Altman+/-2 SD 协议图和变异系数 (CV) 确定了扭矩和每个 TOI 参数的个体内可靠性。在两种收缩强度下，持续和重复任务期间的扭矩和 TOI 参数的平均值在三个测试中均无显著差异 (P>0.05)。所有 TOI 参数均在+/-2 SD 协议范围内。在两种强度下，持续和重复任务的扭矩积分的 CV 相似 (4 至 7%)；然而，在持续和重复任务期间的 TOI 参数的 CV 在 100% MVC (7 至 11%) 下低于 30% MVC (22 至 36%)。结论是，在持续和重复等长收缩任务期间，肱二头肌 NIRS 参数的可靠性是可以接受的。
