The effect of endurance training on the rate of nitrogen elimination in women.
BACKGROUND
The rate of nitrogen elimination may be an important factor in evaluating the risk of DCS following dives. The present study determined the reproducibility of a method for evaluating nitrogen elimination (series I), and the effect of chronic training on the nitrogen elimination in healthy young women (series II).


METHODS
Nitrogen elimination was determined with subjects wearing an AGA full-face mask breathing pure oxygen. To evaluate the reproducibility of the method for nitrogen elimination, three tests were performed in six subjects in series I. Nitrogen elimination in series II was measured before and after the training period. The training protocol (series II) consisted of interval training, three times per week for eight weeks. Four repeated intervals alternated between four minutes at 90-95% of maximum heart rate and three minutes at 50-60%.


RESULTS
There was no significant difference between the three repeated tests. Interval training for eight weeks increased maximum oxygen uptake by 22.1%. Endurance training did not influence the total nitrogen elimination at rest.


CONCLUSIONS
The method for evaluating nitrogen elimination at rest was found to be reproducible. Improved aerobic capacity does not increase the rate of nitrogen elimination at rest.
Lundsett
N
N
Department of Circulation and Medical Imaging, Norwegian University of Science and Technology, Trondheim, Norway.
Wisløff
U
U
Hjelde
A
A
Brubakk
A O
AO
D000328:Adult; D015444:Exercise / Q000502:physiology*; D005260:Female; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D009584:Nitrogen / Q000378:metabolism*; D010100:Oxygen / Q000378:metabolism; D010807:Physical Endurance / Q000502:physiology*; D015203:Reproducibility of Results; D012119:Respiration
D009584:Nitrogen; D010100:Oxygen