Functionally Relevant Thresholds of Quadriceps Femoris Strength

摘要: The purpose of this study was to identify quadriceps femoris strength thresholds below which performance on ambulatory tasks is compromised. A second evaluate whether self-reported functioning matches evaluated the activities. Subjects (N = 100; age 73 +/- 0.9 years) participated in isometric knee extension tests, performed three functional (chair rise, gait speed, and stair ascent descent), answered standard survey questions assessing physical function. Significant relationships were observed between ratio leg peak torque body weight (STR/WT) for each activity (p <.0001). For activity, STR/WT 3.0 3.5 N m/kg observed, likelihood success reduced. Thresholds determined by calculating value that minimized classification error. Individuals with a < are at substantial risk impaired function chair descent. Sensitivity specificity as predictor ranged from 76% 81% 78% 94%, respectively, depending activity. This clinical significance, can individuals preclinical disability (beginning have difficulty tasks) opposed those whom an outright observed. may be useful targeting strengthening interventions developing specific intervention goals.