Figure 1.
Representative NIRS data
NIRS deoxygenated haemoglobin/myoglobin (HHb) signal collected from the vastus lateralis muscle. A, the test protocol consisted of two measurements of resting mVO2, by way of arterial occlusion, post-exercise recovery kinetics of mVO2 and an ischaemic calibration. B, post-exercise recovery kinetics of mVO2 was measured using transient repeated arterial occlusions. C, post-exercise measurements of mVO2 were fit to a monoexponential curve to characterize the rate constant (index of mitochondrial respiratory capacity). Representative NIRS data are also shown for oxygenated haemoglobin/myoglobin (O2Hb), total haemoglobin (tHb) and tissue saturation (StO2) signals for the entire test protocol (D, G and J, respectively), the post-exercise recovery kinetics (E, H and K, respectively) and post-exercise mVO2 measurements (F, I and L, respectively).