2017
DOI: 10.33549/physiolres.933612
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Assessing Muscular Oxygenation During Incremental Exercise Using Near-Infrared Spectroscopy: Comparison of Three Different Methods

Abstract: Using continuous-wave near-infrared spectroscopy (NIRS), this study compared three different methods, namely the slope method (SM), the amplitude method (AM), and the area under the curve (AUC) method to determine the variations of intramuscular oxygenation level as a function of workload. Ten right-handed subjects (22±4 years) performed one isometric contraction at each of three different workloads (30 %, 50 % and 90 % of maximal voluntary strength) during a period of twenty seconds. Changes in oxyhemoglobin … Show more

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Cited by 14 publications
(12 citation statements)
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“…Blood oxygenation level dependent-local field potential (BOLD-LFP) coupling model suggests that positive BOLD responses (i.e., increased oxy-Hb) correspond to actively actuated increase in blood flow in support of neural activity (Ekstrom 2010; Bartra, McGuire, & Kable 2013). Therefore, the cumulated amplitudes of oxy-Hb (i.e., AUC) were used as an indicator of cognitive load, which was used in prior literature to evaluate cognitive load (Manfredini et al 2009;Agbangla, Audiffren & Albinet 2017;Suzuki et al 2018). In addition to the positive AUC, the absolute AUC was also calculated.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…Blood oxygenation level dependent-local field potential (BOLD-LFP) coupling model suggests that positive BOLD responses (i.e., increased oxy-Hb) correspond to actively actuated increase in blood flow in support of neural activity (Ekstrom 2010; Bartra, McGuire, & Kable 2013). Therefore, the cumulated amplitudes of oxy-Hb (i.e., AUC) were used as an indicator of cognitive load, which was used in prior literature to evaluate cognitive load (Manfredini et al 2009;Agbangla, Audiffren & Albinet 2017;Suzuki et al 2018). In addition to the positive AUC, the absolute AUC was also calculated.…”
Section: Discussionmentioning
confidence: 99%
“…So, the positive AUC results are reported. The positive AUC for all channels was used for comparison between the concept generation techniques and is described in the results as the overall cognitive load in the PFC (Manfredini et al 2009;Agbangla, Audiffren & Albinet 2017;Suzuki et al 2018).…”
Section: Discussionmentioning
confidence: 99%
“…Finally, we examined the correlation between differences in O2Hb during exercise (L-PFC minus R-PFC) and changes in reaction time after exercise rest (post2-post1) from three perspectives: (1) peak O2Hb, (2) area under the O2Hb curve (AUC O2Hb), and (3) increase in the slope of O2Hb [71][72][73]. These three calculation methods, respectively, represented the following: (1) whether the improvement in cognitive function depended on the increase in O2Hb levels, (2) whether the improvement in cognitive function depended on the significant increase in and maintenance of O2Hb for a sufficient period of time, and (3) whether the improvement in cognitive function depended on the speed of the elevation in O2Hb levels.…”
Section: Discussionmentioning
confidence: 99%
“…The leg probe of the OxiplexTS TM system was positioned over the vastus lateralis muscle 10–12 cm above the knee, parallel to the major axis of the thigh [37], and the thoracic probe was positioned approximately at the sixth intercostal space along the anterior axillary line [38] to monitor the anterior serratus and intercostal muscles [39]. We selected the anterior serratus muscle because fatigue of this muscle is accompanied with diaphragmatic fatigue during incremental exercise [40] and during the latter stages of maximal exercise (75% of maximum V.O 2 and more [41]), and becomes dominant in hyperventilation [42,43]. A piece of plastic wrap was used to prevent the lamp from becoming fogged by sweat during exercise.…”
Section: Methodsmentioning
confidence: 99%
“…For comparisons within different time points for the same variable, we did not adjust for other confounders as the measurements were from the same subject and the comparisons were planned a priori [5]. During loaded exercise, the HHb level is workload-related [35,42,50] and thus, the Hb variables were additionally corrected for peak workload. Pearson’s correlation coefficients were used to quantify the pair-wise relationships between NIRS data and the demographic, lung function and peak exercise variables.…”
Section: Methodsmentioning
confidence: 99%