A Novel Way of Testing Hip Extension and Flexion Strength, and Strength Ratio in the Clinical Setting: Is it Reliable?

The authors aimed to evaluate the test-retest reliability of measuring maximal isometric hip extension and flexion strength in a semi-standing position with the hip at 60° flexion. Their findings indicate that this method demonstrates good to excellent relative reliability for both extension and flexion strength, making it suitable for group-level assessments, although individual variability should be considered when interpreting changes over time.