What massage movement is produced by rapid muscle contractions in the therapist's hands?

The correct answer is vibration. In massage therapy, vibration refers to a technique that involves the application of rapid, oscillating movements or muscle contractions in the therapist’s hands. This technique can stimulate the nervous system, enhance muscle relaxation, and improve blood circulation. It may be applied using the fingers, hands, or even mechanical devices.

Vibration is distinct from the other massage movements: tapotement consists of percussive strokes like chopping or knocking; petrissage involves kneading and squeezing muscles; and effleurage consists of long, gliding strokes across the skin. Each technique has unique benefits and purposes, but it is the specific rapid contracting movements in vibration that set it apart, focusing primarily on invigorating and stimulating the body's neural and muscular systems.