Objective: To design a test rig for measuring isometric quadriceps' force which is easily adjustable, dismountable, transportable, relatively lightweight and inexpensive. Also to produce a data-acquisition software program that enables real-time feedback of the force signal, automatic analysis of maximal voluntary contraction (MVC) force, and submaximal target levels to be displayed on a computer screen, as well as acquisition of other signals such as electromyographic (EMG) activity.
Methodology: A test rig was constructed using an aluminium tubing system which was fully adjustable and could be flat-packed for transportation. The data acquisition software program was written in Borland C++ and is suitable for use with an IBM-compatible PC. The interface is user friendly, and the entire testing system is relatively inexpensive compared to commercially available systems.
Conclusions: The equipment is suitable for various applications in rehabilitation research and clinical testing, and is suitable for examining different muscles. Further technical details are freely available from the authors.
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