Which of the following techniques improves circulation and relaxes muscles?

Petrissage is a kneading massage technique that involves lifting, rolling, and squeezing the muscles to improve circulation and promote relaxation. This technique encourages blood flow to the tissues, enhances lymphatic drainage, and helps in reducing muscle tension, making it effective in creating a calming effect on the body.

Friction, another massage technique, consists of applying deep pressure to specific areas to stimulate circulation and break down adhesions. This technique can also promote muscle relaxation by alleviating tightness and enhancing the supply of oxygen and nutrients to the muscles.

Tapotement, or percussion, involves rhythmic tapping or striking motions on the muscle surface. This technique stimulates the nervous system and can enhance circulation while providing a refreshing effect on the muscles, contributing to their relaxation.

Since all these techniques (petrissage, friction, and tapotement) have unique yet complementary benefits for improving circulation and relaxing muscles, the option that states "all of the above" is indeed the best choice. Each technique contributes to the overall goal of enhancing blood flow and relieving muscle tension in different ways.