Fig. 1From: Effect of high-frequency alternating current transcutaneous stimulation over muscle strength: a controlled pilot studyStimulation effect on maximal handgrip strength. Sham stimulation (circle), 5 kHz (square), and 10 kHz (triangle). Data are represented as mean and standard error. * Indicates significantly different compared to sham stimulation (***p < 0.001; **p < 0.01). + Indicates a significant difference compared to 5 kHz stimulation (++p < 0.01). # Indicates significantly different from baseline (###p < 0.001)Back to article page