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Comment
. 2007 Dec 15;585(Pt 3):919-21; author reply 923-4.
doi: 10.1113/jphysiol.2007.145110. Epub 2007 Oct 25.

Arterial oxygenation, central motor output and exercise performance in humans

T D Noakes, F E Marino
Comment

Arterial oxygenation, central motor output and exercise performance in humans

T D Noakes et al. J Physiol. .
No abstract available

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Figures

Figure 1
Figure 1
A, changes in peripheral fatigue and in EMG activity with changes in formula image. Note that whereas there is no relationship between formula image and the extent to which peripheral fatigue developed, there was a linear relationship with a negative slope between change in EMG activity and formula image. B, changes in peripheral fatigue and in EMG activity with changes in formula image. Note that whereas there is no relationship between formula image and the extent to which peripheral fatigue developed, there appears to be an exponential relationship between change in EMG activity and formula image. These relationships suggest that the impaired performance measured during exercise at reduced formula image is due to changes in central motor command and EMG activity rather than in increased levels of ‘peripheral fatigue’ in line with the authors' conclusions. However we argue that changes in central motor command act through a feedforward (anticipatory) control rather than in response to increasing ‘peripheral fatigue’.
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