Review question/objective The primary objective of this systematic review is to examine the best available evidence on the clinimetrics of the three main methods of assessing muscle strength: manual muscle testing (MMT), isokinetic dynamometry (ID) and hand held dynamometry (HHD). The clinimetric domains include: Reliability Validity Responsiveness Interpretability. A further objective is to determine whether it is appropriate for HHD to become the standard tool for measuring muscle strength for adults with spinal cord injury. Inclusion criteria Types of participants Adult population (adult being defined as 15 years and older in reference to the Australian Spinal Injury Registry which categorises young adults as >15 years) with spinal cord injury, regardless of cause, time since injury, gender or ethnicity. Tests All studies evaluating MMT, IDs and HHDs in all of their variations administered by any health professional. Types of outcomes The objective outcomes will be measured in terms of the clinimetric domains of reliability, validity, responsiveness and interpretability for MMT, IDs and HHDs, as defined above.