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The 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
Kapus, Jernej ...
The purpose of the present study was to ascertain the influence of reduced pulmonary ventilation on blood acid-base balance during swimming. Five trainedswimmers (age 21[plus minus]2 years, height ...187[plus minus]5 cm and weight 83[plus 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, Po[sub]2, Pco[sub]2) before and during the third minute after the exercise. There was only Pco[sub]2 significantly increased after B4 than after B2 (p<0.05). After the exercise other parameters ([LA], pH, HCO[sub]3 and Po[sub]2) 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 Pco[sub]2 to the range of hypercapnia.330
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