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http://hdl.handle.net/10397/87896
Title: | Exercise-induced hemodynamic changes in muscle tissue : implication of muscle fatigue | Authors: | Tan, Q Wang, Y Chen, TLW Wong, DWC Yan, F Li, Z Zhang, M |
Issue Date: | 2-May-2020 | Source: | Applied sciences, 2 May 2020, v. 10, no. 10, 3512 | Abstract: | This research aims to investigate the development of muscle fatigue and the recovery process revealed by tissue oxygenation. The tissue hemodynamics were measured by near-infrared spectroscopy (NIRS) during a 30-min pre-exercise rest, a 40-cycle heel-lift exercise and a 30-min post-exercise recovery. Wavelet transform was used to obtain the normalized wavelet energy in six frequency intervals (I-VI) and inverse wavelet transform was applied to extract exercise-induced oscillations from the hemodynamic signals. During the exercise phase, the contraction-related oscillations in the total hemoglobin signal (DtHb) showed a decreasing trend while the fluctuations in the tissue oxygenation index (TOI) displayed an increasing tendency. The mean TOI value was significantly higher (p < 0.001) under recovery (65.04% ± 2.90%) than that under rest (62.35% ± 3.05%). The normalized wavelet energy of the DtHb signal in frequency intervals I (p < 0.001), II (p < 0.05), III (p < 0.05) and IV (p < 0.01) significantly increased by 43.4%, 23.6%, 18.4% and 21.6% during the recovery than that during the pre-exercise rest, while the value in interval VI (p < 0.05) significantly decreased by 16.6%. It could be concluded that NIRS-derived hemodynamic signals can provide valuable information related to muscle fatigue and recovery. | Keywords: | Frequency characteristic Hemodynamic responses Near-infrared spectroscopy Peripheral muscle fatigue Wavelet transform |
Publisher: | Molecular Diversity Preservation International (MDPI) | Journal: | Applied sciences | ISSN: | 2076-3417 | DOI: | 10.3390/app10103512 | Rights: | © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). The following publication Tan Q, Wang Y, Chen T -W, Wong D -C, Yan F, Li Z, Zhang M. Exercise-Induced Hemodynamic Changes in Muscle Tissue: Implication of Muscle Fatigue. Applied Sciences. 2020; 10(10):3512, is available at https://doi.org/10.3390/app10103512 |
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