Fig. 3From: Effects of electrode size and placement on comfort and efficiency during low-intensity neuromuscular electrical stimulation of quadriceps, hamstrings and gluteal musclesComfort according to the Numeric Rating Scale for pain (NRS) of different electrode sizes (2 × 2 cm, 5 × 5 cm and 5 × 9 cm) on quadriceps, hamstrings and gluteus. P-values calculated with Wilcoxon sign rank test, significant values are boldBack to article page