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Method of analysis influences interpretations of sex-related differences in firing rates during prolonged submaximal isometric contractions
Method of analysis influences interpretations of sex-related differences in firing rates during prolonged submaximal isometric contractions
- Source :
- Journal of musculoskeletalneuronal interactions. 22(1)
- Publication Year :
- 2022
-
Abstract
- This study examined motor unit (MU) firing rates during a prolonged isometric contraction of the vastus lateralis (VL) for females and males.Surface electromyographic (sEMG) signals were recorded from the VL for eleven females and twelve males during a 45-second isometric trapezoid muscle actions at 40% of maximal voluntary contraction (MVC). For each MU, mean firing rate (MFR) was calculated for the initial and final 10-second epochs of the steady torque segment and regressed against recruitment threshold (RT, expressed as %MVC), as well as time at recruitment (TSignificant differences existed across epochs for the y-intercepts (P=0.009) of the MFR vs. TAnalysis method may impact interpretation of firing rate behavior; increases in MU firing rates across a prolonged isometric contraction were observed in the MFR vs. T
Details
- ISSN :
- 11087161
- Volume :
- 22
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- Journal of musculoskeletalneuronal interactions
- Accession number :
- edsair.pmid..........739f82ad1aaeb1bd6e5dd997d5f1805f