MMT relies on the examiner’s ability to apply consistent resistance and grade accurately, which can lead to variability between testers.
Pain during testing may prevent patients from exerting full effort, leading to underestimation of their actual muscle strength.
Young children might have difficulty following instructions or may not consistently participate in the test, affecting reliability.
A dynamometer provides precise and objective data on muscle strength, which is useful for tracking progress or comparing results across time or populations.
Inter-rater variability occurs when different testers perform MMT differently, leading to inconsistent results. This is a key limitation that affects the reliability of MMT across multiple clinicians.
