I TUOI DATI
I TUOI ORDINI
N. prodotti: 0
Totale ordine: € 0,00
I TUOI ABBONAMENTI
I TUOI ARTICOLI
THE JOURNAL OF SPORTS MEDICINE AND PHYSICAL FITNESS
Rivista di Medicina, Traumatologia e Psicologia dello Sport
Indexed/Abstracted in: Chemical Abstracts, CINAHL, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 1,111
The Journal of Sports Medicine and Physical Fitness 1999 Giugno;39(2):128-32
Plasma ammonia response to sprint swimming
Ring S. 1, Mader A. 1, Mougios V. 2
1 Department of Cardiology and Sports Medicine, Sports University of Cologne, Germany;
2 Department of Physical Education and Sport Science, Aristotele University of Thessaloniki, Greece
Background. To study the plasma ammonia response after sprint crawl swimming.
Methods. Nine sprinters (S) and ten non-sprinters (NS) completed a 15-, a 25- and a 50-m crawl at maximal intensity with a 10-min and a 15-min resting period inbetween. Capillary blood samples were collected before and at regular intervals after each effort for plasma ammonia determination.
Results. Ammonia kinetics differed among distances, but not between groups, with peak values (observed 2-8 min postexercise) being higher after 50 m as compared to shorter distances. Significant differences between S and NS were found in peak ammonia after 50 m (124.5±58.2 vs 98.7±6.3 µmoL-1) and in the change of ammonia relative to swim time (ΔNH3/Δt) after 25 m (2.66±1.87 vs 1.49±0.84 μmol L-1 s-1) and 50 m (1.87± 1.33 vs 1.01±0.49 μmol L-1 s-1). ΔNH3/Δt was highest after 15 m (3.33±2.53 in S, 3.92±1.67 μmol L-1 s-1 in NS).
Conclusions. These differences in the plasma ammonia response to sprint swimming according to duration and athlete seem to be connected to distinctions in muscle fiber profile and energy providing processes.