What method is employed to promote relaxation during a back rub?

Applying gentle pressure during a back rub is essential for promoting relaxation. This method stimulates the body's parasympathetic nervous system, which helps calm the body and mind. Gentle pressure encourages the release of muscle tension and can increase blood flow to the area being massaged, contributing to a greater sense of relaxation and comfort.

In contrast, using cold water can create a shock response in the body, potentially leading to tension rather than relaxation. Playing loud music tends to be stimulating, which can inhibit the calming effects sought during a back rub. Strong scents may also evoke varying emotional responses, and while they might help some individuals relax, they can be overwhelming or unpleasant for others, detracting from the overall soothing experience. Thus, gentle pressure stands out as the most effective method for encouraging relaxation during a back rub.