Which of these is NOT part of electrotherapy practice?

The practice of electrotherapy primarily focuses on the use of electrical currents for therapeutic purposes, such as pain relief and muscle stimulation. In this context, T.E.N.S. (Transcutaneous Electrical Nerve Stimulation) and high volt stimulation are well-established electrotherapy modalities that utilize electrical impulses to treat various conditions.

A hot pack application, while a common modality in physical therapy and chiropractic practices for pain relief and muscle relaxation, does not involve the use of electrical currents. Instead, it utilizes heat to provide therapeutic benefits. Therefore, it does not belong to the category of electrotherapy practices.

Hubbard tank sterilization pertains to a specific therapeutic approach using a heated water tank for treatment, which also does not involve electrical stimulation. However, it’s more administrative than a therapeutic intervention, and it doesn't align with the core practice of electrotherapy.

Overall, the differentiation lies in understanding that electrotherapy specifically involves electrical applications, while other modalities like hot pack application primarily utilize heat.