Effects of Hip Position on Conventional Isokinetic Knee Flexion/Extension Ratios: A Critically Appraised Topic

Clinical Scenario : The traditional knee flexion/extension isokinetic testing position has the hip flexed to ∼90°, which deviates from hip positions during many functional activities and affects the length-tension balance of the hamstrings disproportionately compared with the quadriceps. Clinical Question : What is the effect of a more extended hip position compared with the traditional flexed hip position on isokinetic conventional hamstrings to quadriceps (H:Q) peak torque ratios across the velocity spectrum in healthy adults? Summary of Key Findings : Three studies were identified as meeting the criteria for inclusion. Compared with the traditional hip flexion position, two studies reported no significant H:Q changes in 30° and 45° of hip flexion, whereas two investigations reported significantly lower H:Q in