147 KB0 KB199220252002Kapus, JernejKapus, VenceslavŠtrumbelj, BoroUšaj, Antonštevilka:1letnik:8str. 14-18ISSN:1318-2269COBISSID:1623217URN:URN:NBN:SI:doc-J0L0B08EenFakulteta za šport, Inštitut za kineziologijoKinesiologia Slovenicadihanjefiziologijafrekvenca dihanjaplavanjeraziskaveThe influence of reduced breathing during swimming on some respiratory and metabolic values in blood| Vplivi zmanjšane frekvence dihanja med plavanjem na dihalne in metabolne kazalce v krvi|The purpose of the present study was to ascertain the influence of reduced pulmonary ventilation on blood acid-base balance during swimming. Five trained swimmers (age 21plus minus2 years, height 187plus minus5 cm and weight 83plus minus 6 kg) volunteered to participate in this study. They had to swim 400 m front crawl at velocity VOBLA two times. Firstly, they were taking breath every two strokes (B2). During the second trial they swam the same distance at the similar velocity, however with reduced breathing frequency, taking breath every four strokes (B4). Measures included lactate concentration (LA) and parameters of blood acid-base status (pH, Posub2, Pcosub2) before and during the third minute after the exercise. There was only Pcosub2 significantly increased after B4 than after B2 (p<0.05). After the exercise other parameters (LA, pH, HCOsub3 and Posub2) did not change significantly in response to reduced breathing frequency during swimming. It may be concluded that the reduced breathing frequency during front crawl swimming at VOBLA velocity did not cause hypoxia nor increased LA. However, it increased the Pcosub2 to the range of hypercapnia.330Namen raziskave je bil ugotoviti učinke zmanjšane frekvence dihanja na kazalce acidobaznega statusa krvi med plavanjem s hitrostjo, ki jo določa kriterij Onset of Blood Lactat Accumulation (VOBLA). V raziskavo je bilo vključenih pet zdravih plavalcev, starih od 18 do 23 let (višina 187plus minus 6 cm in teža 83 kgplus minus9 kg), ki so odplavali 400 m kravl z dihanjem na vsak drugi zavesljaj (D2) in 400 m kravl z dihanjem na vsak četrti zavesljaj (D4). Pri tem smo merili: vsebnost laktata (LA) in kazalce acido baznega statusa v krvi (pH, Pspodaj2, Pcospodaj2). Vzorce smo jemali pred naporom in v tretji minuti po naporu. Le vrednosti Pcspodaj2 po D4 so značilno višje od vrednosti Pcospodaj2 po D2 (p<0.05). Preostale vrednosti drugih kazalcev acidobaznega statusa po D4 so podobne vrednostim po D2. Na osnovi teh rezultatov smo zaključili, da zmanjšana frekvenca dihanja med plavanjem pri hitrosti VOBLA ne vpliva na znižanje Pospodaj2 ali povečanje LA, temveč zviša Pcospodaj2 v področje hiperkapnijeTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Ljubljani, Fakulteta za šport