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DOI: 10.1055/s-2007-1024859
Ammonia and Lactate: Differential Information on Monitoring Training Load in Sprint Events
Publication History
Publication Date:
14 March 2008 (online)
Abstract
Two hypotheses were tested concerning training relevance of ammonia in capillary blood compared with lactate after extensive and intensive high-paced runs.
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There is a load threshold at which ammonia concentration deviates statistically significantly from the pre-load level, while lactate indicates already anaerobic metabolic processes at extensive training loads. Increased ammonia concentration is understood as the activation of type lib fibers.
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The increase in ammonia is primarily a consequence of increasing training load intensity.
The hypotheses were tested in a field experiment with male sprinters n = 13. The experimental plan followed a design of repeated measures in a 4 × 4 Latin-square. The subjects completed four high-pace runs (300m) at 82.5%, 85%, 87.5%, and 90% of the maximum running intensity (identified in a contest).
The results confirmed our first hypothesis. Significant increase in ammonia concentration was not found until after four runs at an intensity of 87.5% or after one 300-m run at maximum running speed. In contrast to this, a glycolytic reaction became evident in one run at 82.5% of the maximum intensity. Lactate concentration exceeded the anaerobic threshold at this point. Definite instructions for training practice cannot be made at the present state of research.
Key words
ammonia - lactate - field experiment - load intensity