NIRS: MEASURING CHANGES IN MUSCLE OXYGENATION AND THE DETECTION OF MUSCLE ACTIVITY
Vesna Geršak, Gregor Geršak
Abstract:
NIRS (Near Infrared Spectrophotometry) is a non-invasive optical method for continuous measurement of tissue oxygenation and hemodynamic, which can be observed as relative changes in the concentration of haemoglobin in the blood and thus indirectly the oxygen content in the blood, ie tissue oxygenation.
In our experiment, we wanted to determine the practical limitations of NIRS method and correlation with an increase in muscle activity in the case of isometric muscle contraction (m. tibialis anterior). Simultaneously a more commonly used EMG (electromyography) method was employed. EMG is a method for the observation of muscle activity, based on the measurement of changes in electrical potential across the membrane of muscle fibres.
We found that the use of NIRS device NIRO2-X2 is impractical for use in the sports field and unreliable for a reproducible measurement. Our results show that in the case of momentary increase of voluntary isometric muscle contraction both NIRS and EMG signals are adequate parameters to determine the beginning of muscle activity increase.
Keywords:
NIRS, EMG, oxygenation, haemoglobin, sports medicine
Download:
IMEKO-WC-2009-TC13-436.pdf
DOI:
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Event details
Event name:
XIX IMEKO World Congress
Title:

Fundamental and Applied Metrology

Place:
Lisbon, PORTUGAL
Time:
06 September 2009 - 11 September 2009
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