Skeletal Muscle Oxidative Metabolism during Exercise Measured with Near Infrared Spectroscopy
This study characterized the level of oxidative metabolism in skeletal muscle during whole-body activity as a percentage of the muscle’s maximum oxidative rate (mVO<sub>2</sub>max) using near-infrared spectroscopy (NIRS). Ten healthy participants completed a progressive work test and who...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-10-01
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| Series: | NDT |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2813-477X/2/4/25 |
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| Summary: | This study characterized the level of oxidative metabolism in skeletal muscle during whole-body activity as a percentage of the muscle’s maximum oxidative rate (mVO<sub>2</sub>max) using near-infrared spectroscopy (NIRS). Ten healthy participants completed a progressive work test and whole-body walking and lunge exercises, while oxygen saturation was collected from the vastus lateralis muscle using near-infrared spectroscopy (NIRS). Muscle oxygen consumption (mVO<sub>2</sub>) was determined using arterial occlusions following each exercise. mVO<sub>2</sub>max was extrapolated from the mVO<sub>2</sub> values determined from the progressive exercise test. mVO<sub>2</sub>max was 11.3 ± 3.3%/s on day one and 12.0 ± 2.9%/s on day two (<i>p</i> = 0.07). mVO<sub>2</sub>max had similar variation (ICC = 0.95, CV = 6.4%) to NIRS measures of oxidative metabolism. There was a progressive increase in mVO<sub>2</sub> with walking at 3.2 Km/h, 4.8 km/h, 6.4 Km/h, and with lunges (15.8 ± 6.6%, 20.5 ± 7.2%, 26.0 ± 6.6%, and 57.4 ± 15.4% of mVO<sub>2</sub>max, respectively). Lunges showed a high reliability (ICC = 0.81, CV = 10.2%). Muscle oxidative metabolism in response to whole-body exercise can be reproducibly measured with arterial occlusions and NIRS. This method may be used to further research on mitochondrial activation within a single muscle during whole-body exercise. |
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| ISSN: | 2813-477X |