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28 October 2009 Comparison between the changes in muscle oxygenation and blood lactate concentration in finswimmers during incremental exercise
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Abstract
For the purpose of comparing the response in local skeletal muscle oxygenation and blood lactate concentration during incremental exercise, 8 female finswimmers were recruited to take an incremental exercise on a cycle ergometer. Muscle oxygenation in right vastus lateralis (VL) were monitored by continuous wave near infrared spectroscopy (CW NIRS), respiratory gas exchange and blood lactate concentration ([La]b) were simultaneously measured by a metabolic system and a portable blood lactate analyzer respectively. NIRS measurements showed a muscle oxygenation index inflection point (OIip), from which the muscle oxygenation started to decrease dramatically. Significant correlations have been found between OIip and blood lactate threshold identified at the lowest [La]b value which was >0.5 mmol/L lower than that obtained at the following workload. These results might suggest that the CW NIRS measurement could be applied to monitor lactate threshold noninvasively.
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Bangde Wang, Qingping Tian, Zhongxing Zhang, and Hui Gong "Comparison between the changes in muscle oxygenation and blood lactate concentration in finswimmers during incremental exercise", Proc. SPIE 7519, Eighth International Conference on Photonics and Imaging in Biology and Medicine (PIBM 2009), 75190C (28 October 2009); https://doi.org/10.1117/12.845434
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