Techniques that utilize deep-tissue/deep-muscle massage are administered to affect the sub-layer of musculature and fascia. These techniques require advanced training and a thorough understanding of anatomy and physiology. The muscles must be relaxed in order to effectively perform deep-tissue massage, otherwise tight surface muscles prevent the practitioner from reaching deeper musculature. It helps with chronic muscular pain and injury rehabilitation and reduces inflammation-related pain caused by arthritis and tendinitis. It is generally integrated with other massage techniques.