Figure 3

Electrode Placement. Approximate locations for electrode placement superficial to QUAD, HAM, and GLUT, muscles. Active and ground electrodes were spaced approximately 4 cm apart. The QUAD ground electrode was placed approximately 5 cm from the patellar apex, HAM ground electrode was placed approximately 5 cm from the knee crease, and GLUT ground electrode placed along the gluteal fold. To maintain consistency, electrode placement was performed by the same person for all subjects.