Which massage technique is appropriate for reducing swelling in a client's knee?

Effleurage is a massage technique that involves long, gliding strokes, which can help promote lymphatic drainage and blood circulation. This is particularly beneficial for reducing swelling, as it encourages the movement of fluid away from the affected area. By applying gentle pressure and gradually increasing it, effleurage helps to stimulate the soft tissues around the knee, allowing for the removal of excess fluid that may cause swelling.

In contrast, the other listed techniques may not be as effective for swelling reduction. Petrissage focuses on kneading and lifting the tissue, which can be more intense and may not specifically target the lymphatic system. Tapotement involves rhythmic percussion on the body, which is stimulating and can be energizing but does not address fluid retention or swelling effectively. Friction is typically used to break down adhesions and scar tissue by applying deep pressure to specific spots, making it less suitable for managing swelling.

Thus, effleurage stands out as the appropriate choice for addressing swelling in a client's knee through its gentle and mobilizing technique.