caa a22 4500 469054352 CHVBK 20180323132839.0 cr unu---uuuuu 170328e19920501xx s 000 0 eng 10.1007/BF00705083 doi (NATIONALLICENCE)springer-10.1007/BF00705083 Blood ammonia and lactate concentrations during endurance exercise of differing intensities [Elektronische Daten] [Axel Urhausen, Wilfried Kindermann] Summary: The purpose of this study was to examine the changes of blood ammonia concentration ([NH3]b) during endurance exercise of differing intensities on the cycle ergometer and to compare [NH3]b to the changes observed in the simultaneously monitored blood lactate acid concentrations ([la−]b) measurements. A group of 16 endurance-trained athletes participated in the first part of the study and performed exercise of 30 min duration in a randomized order at intensities of 85%, 95%, 100% and 105% of their individual anaerobic threshold (Than,ind; E85-E105) which had been determined beforehand by a cycle exercise test with stepwise increments in intensity. In the second part, 18 average endurance-trained sports students underwent exhausting intensive endurance exercise (IEE) with an intensity of 95% of Than,ind. An extensive endurance exercise (EEE) of the same duration at 85% of the Than,ind was carried out 2 days later. The [NH3]b increased constantly with increasing duration of all exercise. However, [la−]b only increased during exercise with intensities above the Than,ind (E105). The increase of [NH3]b was higher with higher exercise intensities. At IEE, [NH3]b was significantly higher from the 30th min than at EEE, whereas [la−]b increased from the 5th min. In conclusion, [la−]b responded more sensitively to the intensity of exercise than [NH3]b, but it is conceivable that in the future measurements of [NH3]b could be used to advise on the duration of endurance training. At present, however, the lack of experience and lack of appropriate values still hinders the systematic use of [NH3]b measurements in the physiological monitoring of sports training. Springer-Verlag, 1992 Ammonia nationallicence Lactate nationallicence Individual anaerobic threshold nationallicence Endurance training nationallicence Urhausen Axel Institute of Sports and Performance Medicine, University of the Saarland, W-6600, Saarbrücken, Germany aut Kindermann Wilfried Institute of Sports and Performance Medicine, University of the Saarland, W-6600, Saarbrücken, Germany aut European Journal of Applied Physiology and Occupational Physiology Springer-Verlag 65/3(1992-05-01), 209-214 0301-5548 65:3<209 1992 65 421 https://doi.org/10.1007/BF00705083 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00705083 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Urhausen Axel Institute of Sports and Performance Medicine, University of the Saarland, W-6600, Saarbrücken, Germany aut NATIONALLICENCE 700 1- Kindermann Wilfried Institute of Sports and Performance Medicine, University of the Saarland, W-6600, Saarbrücken, Germany aut NATIONALLICENCE 773 0- European Journal of Applied Physiology and Occupational Physiology Springer-Verlag 65/3(1992-05-01), 209-214 0301-5548 65:3<209 1992 65 421 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer