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Table 2 Correlation coefficient analysis in young (n = 23)

From: Relationships between muscle strength and multi-channel surface EMG parameters in eighty-eight elderly

   R P  
MVC Age 0.357 0.095  
  MT 0.326 0.129  
  ST 0.291 0.178  
  ME −0.583 0.004 *
  RMS 0.406 0.054  
  NRMS −0.086 0.697  
  CRR 0.201 0.359  
  1. MVC, maximal voluntary isometric knee extension joint torque; MT, Muscle thickness of vastus lateralis; ST, subcutaneous tissue thickness; ME, modified entropy of surface electromyography at 65% of the maximal voluntary contraction; RMS, root mean square value of surface electromyography for all channels in electrode grid at 65% of the maximal voluntary contraction; NRMS, root mean square of surface electromyography for all channels in electrode grid at 65% of the maximal voluntary contraction normalized by that at 20% of the maximal voluntary contraction; CRR, correlation coefficient value in root mean square of surface electromyography between 20 and 65% of the maximal voluntary contraction
  2. * indicates significant correlation