Review of the reliability and validity of myometry with children.

Pediatric occupational therapists and physical therapists often measure muscle strength, and muscle strength frequently is cited as an indicator of function in clinical practice and in research. A reliable measure to quantify strength is necessary to accurately assess muscle strength so the values can be used for comparison, study, and indication of change. The hand-held myometer provides an alternative to traditional methods of manual muscle testing, and its reliability and validity have been examined in adults. The purpose of this review is to summarize the available literature relating to the reliability and validity of the hand-held myometer when used with children and to identify directions for future study in the use of myometers with children.