[Blood oxygen and lactate concentrations in skeletal muscles during exercise].
OBJECTIVE
To study the relationship between blood lactate and blood oxygenation in human skeletal muscle.


METHODS
Using a portable tissue oximeter based on Near-Infrared Spectroscopy (NIRS), concentration of HbO2, blood lactate and blood volume were measured non-invasively and continuously when the subjects were doing incremental exercise on a bicycle ergometer.


RESULTS
As the intensity of exercise was increased, blood lactate concentration, blood volume in tissue increased, while concentration of HbO2 decreased.


CONCLUSIONS
It is possible to assess the fatigue state with tissue oximeter by monitoring intensity of exercise non-invasively and dynamically. By studying their correlations, a novel approach for measuring blood lactate non-invasively and assessing sports ability could be provided.
Xu
Guo-dong
GD
Liu
Fang
F
Gong
Hui
H
Ge
Xin-fa
XF
Luo
Qing-ming
QM
D001642:Bicycling; D001810:Blood Volume / Q000502:physiology; D015444:Exercise / Q000502:physiology*; D005221:Fatigue; D006339:Heart Rate; D006801:Humans; D019344:Lactic Acid / Q000097:blood / Q000378:metabolism*; D018482:Muscle, Skeletal / Q000378:metabolism*; D010092:Oximetry; D010100:Oxygen / Q000032:analysis / Q000097:blood / Q000378:metabolism*; D010108:Oxyhemoglobins / Q000032:analysis / Q000378:metabolism; D019265:Spectroscopy, Near-Infrared
D010108:Oxyhemoglobins; D019344:Lactic Acid; D010100:Oxygen