Abstract
The well-known runman NIR tissue spectrometer has achieved notable success in skeletal muscle spectroscopy of relative desaturation of hemoglobin and myoglobin and total hemoglobin changes in the deoxygenation and increased flow in limb exercise. Heterogeneity of response depending upon pennation and fascicle differences requires images in at least 2-D in order to localize the particular portion of the exercised muscle at maximal metaoblic and vascular responses. While stationary exercise is useful, it may fail to clearly reproduce the muscle image in an athlete's speciality. Thus, a wearable “runman” (Omron) has been most useful but fails to provide images of muscle function. Novel featurs of lamp pulsing and gated data acquisition, together with good power economy, now makes possible scans of 20 sources and dual wavelength detectors in 1.1 sec and present the image in 0.1 sec thereafter. The new principle affords images of localized muscle activation with a 1 centimeter (squared) resolution of relative deoxygenation and blood concentration changes. These patterns differ among individuals and their changes during exercise near Vmax may be of use as a training aid.
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