Muscle Stimulation therapy is a form of electrical stimulation used to aid muscle injury recovery. This type of treatment sends small electrical impulses through targeted muscles to make them contract. (Flexing your biceps is a form of muscle contraction.) By causing repeated muscle contractions, blood flow improves, helping repair injured muscle tissue. This treatment technique is very effective in helping to rebuild muscle tissue after significant acute muscle trauma or when muscle atrophy (muscle loss) has occurred. As an example, it is often used to promote growth and activate thigh muscles after knee surgery.