Final answer:
Low Frequency Current will produce a mild, stimulating sensation while using High Frequency Current.
Step-by-step explanation:
In order to produce a mild, stimulating sensation while using High Frequency Current, Low Frequency Current should be used. Low Frequency Current will produce a mild, stimulating sensation while using High Frequency Current.
According to the information provided, the body is most sensitive to frequencies near the 50- or 60-Hz frequencies in common use, which are categorized as low frequencies. At higher frequencies, the body becomes progressively less sensitive to any effects that involve nerves.
Therefore, it is the Low Frequency Current that will produce a mild, stimulating sensation during the use of High Frequency Current.