Muscle imbalances (e.g., weak abdominals combined with tight hip flexors) are identified as the root cause of many pain syndromes, such as lumbar lordosis or lower back pain.
Precise patient positioning is required to eliminate "substitution" or compensatory movements from other muscles during a test. The Kendall Muscle Grading System -I Muscoli Funzioni E Test Kendall pdf-
Kendall's muscles : testing and function with posture and pain Muscle imbalances (e
Kendall uses a highly detailed scale, often ranging from 0% to 100%, to provide a more nuanced assessment than the traditional 0-5 scale. Percentage Description Full ROM against gravity with maximum resistance. Good (4) Full ROM against gravity with moderate resistance. Fair (3) Percentage Description Full ROM against gravity with maximum
Unlike other systems that test movements, Kendall emphasizes isolating individual muscles to pinpoint specific weaknesses or tightness.
The Kendall approach is built on the belief that is a direct reflection of musculoskeletal balance.