Figure 5

Power in the high-, middle-, and low frequency band. Mean normalized power in the 8–12 Hz band (a, d), 4–7 Hz band (b, e), and the 1–3 Hz band (c, f) for elbow flexion (a, b, c) and shoulder abduction (d, e, f) at four different load levels (0, 1, 2, and 3 kg). Error bars indicate 95% confidence interval. *P < 0.05; **P < 0.01.