Oscillation of oxygenation in skeletal muscle at rest and in light exercise

Yano, T. and Lian, C. and Arimitsu, T. and Yamanaka, R. and Afroundeh, R. and Shirakawa, K. and Yunoki, T. (2013) Oscillation of oxygenation in skeletal muscle at rest and in light exercise. Acta Physiologica Hungarica, 100 (3). pp. 312-320. ISSN 0231-424X

[img] Text
Restricted to Repository staff only until 30 September 2033.

Download (275kB)


The aim of the present study was to compare the frequency of oxygenation determined in the vastus lateralis by near-infrared spectroscopy (NIRS) in light exercise with that at rest. A subject rested in a recumbent position for 5 min and changed body position to a sitting position on a cycle ergometer for 9 min. Then exercise with low intensity (work rate of 60% of maximal oxygen uptake) was carried out for 30 min. Total hemoglobin and myoglobin (THb/Mb) suddenly decreased after the start of exercise and gradually increased for 6 min. Oxygenated hemoglobin and myoglobin (Hb/MbO<sub>2</sub>) suddenly decreased and returned to a steady-state after the start of exercise. The difference between Hb/MbO<sub>2</sub> and THb/Mb showed a sudden decrease and then a steady-state. This difference was analyzed by fast Fourier transform. The peak frequencies of the power spectrum density (PSD) were 0.0169 ± 0.0076 Hz at rest and 0.0117 ± 0.0042 Hz in exercise. The peak frequency of PSD was significantly decreased in exercise. In exercise, the range of frequencies was expanded. It is concluded that there are oscillations at rest as well as in exercise and that the frequency of peak PSD becomes lower in exercise than at rest.

Item Type: Article
Subjects: R Medicine / orvostudomány > R1 Medicine (General) / orvostudomány általában
Depositing User: Ágnes Sallai
Date Deposited: 26 Apr 2017 07:08
Last Modified: 26 Apr 2017 07:08

Actions (login required)

Edit Item Edit Item