Department| Volume 19, ISSUE 4, P440-441, October 2006

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Using the Torque–Velocity Test of the BTE-Primus to Measure Sincerity of Effort of Grip Strength

      Background: An inverse relationship exists between torque and velocity, with torque increasing as velocity decreases and vice versa.1 For example, maximal torque is produced during isometric effort, when velocity equals 0. For a single joint movement, such as knee extension2,3 and elbow flexion,4 the inverse torque–velocity relationship is linear for the midrange torques and velocities. This linear relationship is maintained when maximal effort is exerted, regardless of age, training level, and fatigue. It is hypothesized that submaximal effort does not produce a linear torque–velocity relationship because replicating a submaximal isotonic contraction requires an enormous amount of proprioceptive feedback and the nervous system may not be able to accurately replicate both force and speed of contraction. If this hypothesis is true, the torque–velocity test of the BTE-Primus may be an effective method for assessing sincerity of effort.
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