What is an example of electrotherapy?

Electrotherapy refers to the use of electrical energy for therapeutic purposes, primarily to promote healing, reduce pain, and stimulate muscles. EMS, or Electrical Muscle Stimulation, is a prime example of electrotherapy as it involves the application of electrical impulses to stimulate muscle contractions. This method is commonly utilized in rehabilitation settings to help improve muscle strength, reduce atrophy during immobilization, and assist in pain management.

In contrast, infrared therapy, whirlpool therapy, and cold packs are modalities that rely on thermal energy rather than electrical energy. Infrared therapy uses light and heat to promote healing, whirlpool therapy utilizes warm water to enhance circulation and relieve pain, while cold packs are employed to reduce inflammation and numb pain through cryotherapy. Each of these modalities has its own indications and mechanisms of action but falls outside the category of electrotherapy. Thus, EMS is the correct answer as it specifically involves the use of electrical stimulation for therapeutic benefits.