Skip to main content

Advertisement

Table 2 Effect of foot posture on all EMG variables

From: Foot posture influences the electromyographic activity of selected lower limb muscles during gait

Muscle Phase of gait cycle EMG
parameter
% mean difference ^ 95% CI Effect size # pvalue
(2-tailed)
Tibialis posterior Contact TimePeak 0.1 0.0 to 1.7 0.52 0.051
   PeakAmp -14.3 -29.1 to 0.4 0.51 0.058
   RMS -7.8 -18.4 to 2.7 0.39 0.144
  Mid/Prop TimePeak 0.0 -3.8 to 3.7 0.01 0.980
   PeakAmp 26.5* 4.2 to 48.7 0.69 0.021*
   RMS 16.4* 3.6 to 29.1 0.68 0.013*
Peroneus longus Contact TimePeak 1.6 0.0 to 3.2 0.51 0.057
   PeakAmp -12.8* -25.1 to -0.5 0.48 0.041*
   RMS -6.6 -13.9 to 0.6 0.48 0.075
  Mid/Prop TimePeak 3.3 -0.3 to 6.9 0.47 0.079
   PeakAmp -20.0 -42.9 to 2.9 0.46 0.086
   RMS -13.7* -26.1 to -1.4 0.58 0.030*
Tibialis anterior Contact TimePeak 0.1 -0.7 to 0.9 0.09 0.737
   PeakAmp 19.0* 11.2 to 26.9 1.3 <0.001*
   RMS 10.4* 4.0 to 16.8 0.87 0.002*
Medial oastrocnemius Mid/Prop TimePeak 0.4 -1.8 to 2.7 0.10 0.715
   PeakAmp 2.7 -15.4 to 20.7 0.12 0.766
   RMS 7.2 -12.3 to 16.9 0.22 0.753
  1. Contact -- contact period of gait cycle; Mid/Prop -- combined midstance and propulsion period of gait cycle; TimePeak -- time of peak amplitude; PeakAmp -- peak EMG amplitude; RMS -- root mean square amplitude; ^ relative to normal-arch foot group; CI -- confidence interval;# Cohen's d calculation;
  2. * statistically significant independent sample t-test (p < 0.05)