What condition is commonly treated with friction along the medial border?

The condition that is commonly treated with friction along the medial border is shin splints. This term refers to pain along the inner edge of the shinbone, or tibia, which is often caused by overuse or repetitive stress on the lower leg muscles and bones.

Friction techniques can help address the underlying muscle tightness and irritation that contribute to shin splints. By applying friction along the medial border, massage practitioners can target the muscles that support the tibia, helping to release tension and improve blood flow to the affected area. This technique is particularly useful for breaking down any connective tissue adhesions and enhancing overall flexibility and function.

In the context of the other options, Achilles tendinitis typically involves treatment focused on the Achilles tendon and surrounding muscles rather than exclusively along the medial border of the tibia. Plantar fasciitis affects the underside of the foot and is treated differently, focusing on the fascia and the structures of the foot rather than the shin. A calf strain relates to muscle injuries in the calf rather than the shin area itself.

Therefore, the application of friction along the medial border is most relevant and effective for shin splints, making it the appropriate choice.