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Prior arm exercise speeds the VO2 kinetics during arm exercise above the heart level
Katrien Koppo1, Jacques Bouckaert
1Department of Movement and Sports Sciences, Ghent University, Ghent, BELGIUM. katrien.koppo@UGent.be
Purpose:
To test the hypothesis that the initial O2 uptake kinetics during exercise where the rise in blood flow (and, by implication, O2 delivery) to the working muscles during an abrupt increase in exercise intensity is reduced (i.e., arm exercise performed above the level of the heart) would be faster when preceded by a bout of high-intensity exercise.
Methods:
Eleven physically active males completed two protocols, each consisting of two consecutive bouts of 6 min of high-intensity arm crank exercise separated by 6 min of recovery. In one protocol, the arm crank exercise was performed with the arms below the level of the heart (
Results:
In the
Conclusion:
The results of this study demonstrate that prior high-intensity exercise caused a significant speeding of the VO2 fast component response during subsequent high-intensity arm crank exercise performed above, and not below, the level of the heart.
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