The nature of torque ???overshoot??? in Cybex isokinetic dynamometry

Determinants of self efficacy for physical tasks in people with knee osteoarthritis

“…Then, 5 trials of maximum effort concentric knee flexion and extension at 60°/second were performed with verbal encouragement. To maximize reliability and validity, the data were "windowed" to remove acceleration and deceleration, thereby eliminating impact artifact (31,32). Only data recorded within 0.1°/second of 60°/second were included.…”

The Relationship Between Isokinetic Quadriceps Strength Test and Hop Tests for Distance and One-Legged Vertical Jump Test Following Anterior Cruciate Ligament Reconstruction

“…A limb symmetry index of less than 85% was considered inadequate for the vertical jump and for the hop tests for distance (3,6,20), and a limb symmetry index of less than 90% was considered inadequate for peak torque (2,4,14,16,21,25).…”

Intramachine and Intermachine Reliability of the Biodex and Cybex®II for Knee Flexion and Extension Peak Torque and Angular Work

“…Subsequent to the initial reduction and analysis of the raw data, however, raw data records were scanned using the graphics capability of the two software systems to identify factors that might explain the magnitude of the ICC values obtained for the raw data analysis. Several factors were identified within the raw data files for the Cybex II: 1) impact artifact, or torque overshoot (11), was present in all of the data records and was more prominent in the data records for 1 80°/sec; 2) torque recordings within segments of impact artifact data often were identified by the computer software for observations of peak torque for knee flexion and extension efforts at 180°/sec; 3) segments of the torqueangular displacement curve that included impact artifact data were included in the software computation of angular work for both angular velocities; and 4) subjects often reversed the direction of angular displacement from flexion to extension prior to obtaining 105' knee flexion, and often reversed the direction of angular displacement from extension to flexion prior to reaching 0' knee flexion. Failure to complete the zero to 105' ROM also was noted for many of the Biodex raw data files.…”