What has been acheived when the frequency of stimulation is so high that muscle tracing shows fused peaks?

When the frequency of stimulation is so high that muscle tracing shows fused peaks, it indicates that the muscle is undergoing complete tetanus. Complete tetanus is a state in which the muscle is fully and continuously contracted, without any relaxation between contractions. This occurs because the frequency of stimulation is high enough to prevent the muscle fibers from fully relaxing before the next stimulus arrives. As a result, the muscle remains in a state of sustained contraction, resulting in a smooth and fused appearance on the muscle tracing.