Which stroke technique is primarily focused on breaking down muscular knots?

The choice of friction as the correct answer highlights its specialized role in addressing muscular knots, often referred to as trigger points. Friction is characterized by its direct and deep pressure applied to a specific area, which can help increase blood circulation and facilitate the breakdown of adhesions or knots in the muscle tissue. This technique is especially useful for targeting small, localized areas of tension, allowing the therapist to apply focused pressure that breaks down the dense muscle fibers and promotes relaxation.

In contrast, effleurage involves long, sweeping strokes that are more suited for warming up the body and promoting relaxation rather than specifically addressing muscle knots. Petrissage is a kneading motion that benefits overall muscle tone but may not penetrate deeply enough to effectively release stubborn knots. Vibration, while useful for stimulating the body and enhancing relaxation, does not apply the concentrated pressure necessary to break down muscular adhesions. Thus, friction stands out as the most effective technique for targeting and alleviating muscular knots.