naa a22 4500 510822835 CHVBK 20180411083542.0 cr unu---uuuuu 180411e20130701xx s 000 0 eng 10.1007/s12541-013-0161-4 doi (NATIONALLICENCE)springer-10.1007/s12541-013-0161-4 Bandwidth optimization of the fatigue index to estimate muscle fatigue during dynamic contractions [Elektronische Daten] [Jungyoon Kim, Soobyeong Kim, Sunwoo Park, Soonjae Ahn, Yongheum Lee, Youngho Kim] In this study, a filter-based fatigue index (FIhlrOPT) was optimized to maximize the correlation with peak power. Cut-off frequencies of high-pass-filter were optimized to determine bandwidth for fatigue estimation. Thirty two subjects performed 5 sets of 10 knee extensions with 2 minutes of rest between each set. Surface electromyography (sEMG) signals were obtained from rectus femoris (RF), vastus medialis (VM), and vastus lateralis (VL) muscles for each subject. The correlation of the proposed index was compared with sEMG-based fatigue indices, such as the mean root-mean-square (RMS) values, median frequency, median frequency after continuous wavelet transform, Dimitrov spectral index and Gonzalez-Izal wavelet index. The correlation of the index proposed in this study was higher (r = 0.81 ± 0.08 (RF), 0.58 ± 0.25 (VM & VL)) than those of the cited fatigue indices. The optimized cut-off frequencies in this study (353.30 ± 49.45 Hz (RF), 348.71 ± 34.28 Hz (VM & VL)) reflects the decreased firing rate during fatigue, and thus cut-off frequencies were appropriate for fatigue estimation. Korean Society for Precision Engineering and Springer-Verlag Berlin Heidelberg, 2013 Electromyography nationallicence Fatigue nationallicence Filter nationallicence Joint power nationallicence Bandwidth optimization nationallicence Kim Jungyoon Department of Biomedical Engineering, Graduate School, Yonsei University, 220-710, Wonju, Gangwon, South Korea aut Kim Soobyeong Department of Biomedical Engineering, Graduate School, Yonsei University, 220-710, Wonju, Gangwon, South Korea aut Park Sunwoo Department of Biomedical Engineering, Graduate School, Yonsei University, 220-710, Wonju, Gangwon, South Korea aut Ahn Soonjae Department of Biomedical Engineering, Graduate School, Yonsei University, 220-710, Wonju, Gangwon, South Korea aut Lee Yongheum Department of Biomedical Engineering, Graduate School, Yonsei University, 220-710, Wonju, Gangwon, South Korea aut Kim Youngho Department of Biomedical Engineering, Graduate School, Yonsei University, 220-710, Wonju, Gangwon, South Korea aut International Journal of Precision Engineering and Manufacturing Springer Berlin Heidelberg 14/7(2013-07-01), 1185-1191 2234-7593 14:7<1185 2013 14 12541 https://doi.org/10.1007/s12541-013-0161-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12541-013-0161-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kim Jungyoon Department of Biomedical Engineering, Graduate School, Yonsei University, 220-710, Wonju, Gangwon, South Korea aut NATIONALLICENCE 700 1- Kim Soobyeong Department of Biomedical Engineering, Graduate School, Yonsei University, 220-710, Wonju, Gangwon, South Korea aut NATIONALLICENCE 700 1- Park Sunwoo Department of Biomedical Engineering, Graduate School, Yonsei University, 220-710, Wonju, Gangwon, South Korea aut NATIONALLICENCE 700 1- Ahn Soonjae Department of Biomedical Engineering, Graduate School, Yonsei University, 220-710, Wonju, Gangwon, South Korea aut NATIONALLICENCE 700 1- Lee Yongheum Department of Biomedical Engineering, Graduate School, Yonsei University, 220-710, Wonju, Gangwon, South Korea aut NATIONALLICENCE 700 1- Kim Youngho Department of Biomedical Engineering, Graduate School, Yonsei University, 220-710, Wonju, Gangwon, South Korea aut NATIONALLICENCE 773 0- International Journal of Precision Engineering and Manufacturing Springer Berlin Heidelberg 14/7(2013-07-01), 1185-1191 2234-7593 14:7<1185 2013 14 12541 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer