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

Table 3 Stepwise regression analysis for elderly

MVC = 34.619MT + 349.554RMS + 8.921*NRMS R = 0.664, R² = 0.441, Adjusted R² = 0.419
Dependent variables	Independent variables	Standardized regression coefficient	P
MVC	MT	0.519	< 0.001
	RMS	0.288	0.001
	NRMS	0.177	0.047

MVC, maximal voluntary isometric knee extension joint torque; MT, Muscle thickness of vastus lateralis; RMS, root mean square of surface electromyography; 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

ISSN: 1861-6909