The goal of this proposal is to develop a computerized, feedback-controlled, portable, battery-powered, hydraulic dynamometer which can be used in normal, reduced-g, and zero-g environments. The proposed device will provide a closed-loop feedback system to measure and control various muscular strength parameters. The innovativeness of this device includes (1) the ability to measure muscular strength without the limitations imposed by traditional weight-related devices; (2) computerization of both the feedback control feature, allowing adjustment of the device to the individual rather than the individual accommodating the device, and customization of the diagnostic and exercise protocols with data storage capabilities; (3) low-voltage, (4) portability, and (5) compactness. The relevance of the proposed equipment for NASA lies in its ability to evaluate astronaut strength and endurance levels as well as to design and follow appropriate exercise protocols in all gravitational environments. Data can be stored for later evaluation and for use in conjunction with other medical or physiological assessments in the continual effort to identify and counter the deconditioning caused by microgravitational conditions.
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