Methods and apparatus for using nuclear magnetic resonance to evaluate the muscle efficiency and maximum power of a subject during locomotion
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United States of America Patent
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Jan 21, 1992
Issued Date -
N/A
app pub date -
Dec 27, 1989
filing date -
Mar 14, 1989
priority date (Note) -
Expired
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Abstract
The muscle efficiency of a subject is evaluated with apparatus comprising a nuclear magnetic resonance (NMR) analytical device which comprises a hollow electromagnet having a bore of sufficient size to receive the subject. Any type of animal can be evaluated, in a preferred embodiment a horse or a human is analyzed. A treadmill within the bore and beneath the subject is utilized to produce locmotion of the subject at different rates of work. The NMR analytical device is used to measure at different rates of work the following ratio within a locomotion-producing muscle mass of the subject: Pi/PCr where Pi is the concentration within the muscle mass of inorganic phosphate and PCr is the concentration within the muscle mass of phosphocreatine. Methods and apparatus are provided for relating the measured Pi/PCr values to the rates of work then being performed by the subject to provide an efficiency profile for the muscle mass.
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