Figure 3. Root mean square (mean ± SD) of (A) the patella signal and (B) the vastus lateralis surface electromyography (sEMG) during no vibration (no-vib) and whole-body vibration (WBV) with no additional load, and with an additional load of 33 kg. The results are illustrated seperately for the first spike (fundamental) and the following spikes (harmonics). *With load > no load (p < 0.05).