How did Per Henrik Ling affect the field of massage therapy?

He created "Swedish massage"

Per Henrik Ling was a Swedish physician who developed a system of massage in the early 19th century. This system, which he called "Swedish massage", is still widely used today. Ling's system of massage is based on the idea of using strokes to stimulate the body's soft tissues and promote relaxation. He believed that this could help to improve circulation and relieve pain. Ling also developed a series of exercises that he believed could be used to improve posture and strength.

Swedish massage is performed using a variety of techniques, including effleurage (gliding strokes), petrissage (kneading), friction (deep pressure), tapotement (percussion) and vibration. These techniques are used to promote relaxation, improve circulation, relieve pain, and reduce muscle tension. Swedish massage is often used as a general relaxation technique, but it can also be used to treat a variety of specific conditions, such as headaches, back pain, and stress.