Dynamic 31P spectroscopy of the skeletal muscle can provide useful insight into its energy metabolism. However, in order to see dynamic changes in metabolites, a minimum threshold of physical exercise is necessary. In this work, we present a system that uses electrical muscle stimulation superimposed to volitional muscle contraction in order to enhance the metabolic response of the muscle in the same workload condition. This method can have potential application to patients that are unable to voluntarily exert sufficient work for a dynamic spectroscopy investigation.
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