Biological variability in maximum aerobic power

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Abstract
Biological variation in maximum aerobic power (.ovrhdot.VO2 max [maximum O2 uptake]) was examined in 4 trained women and 1 trained man. An average of 8-20 repeat .ovrhdot.VO2 max treadmill tests over a 2-4 wk period were performed on each subject (80 total tests). Biological variation (Si) in .ovrhdot.VO2 max was computed as the SD for the .ovrhdot.VO2 max values for each individual, after subtracting net technological error (Se). Technological error was computed for each piece of equipment as the SD of multiple trials. Si + Se amounted to .+-. 5.6%. Biological variability accounted for .gtoreq. 90% of this variability, while technological error accounted for < 10%. In light of the magnitude of biological variation for .ovrhdot.VO2 max, the necessity for securing control data when attempting to study training effects is pointed out.

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