Effects of an Alkalizing or Acidizing Diet on High-Intensity Exercise Performance under Normoxic and Hypoxic Conditions in Physically Active Adults: A Randomized, Crossover Trial
| Autor: | Limmer, Mirjam, Sonntag, Juliane, de Marées, Markus, Platen, Petra |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Adult
Male anaerobic exercise test lcsh:TX341-641 Urinalysis Article Running Young Adult Oxygen Consumption Humans Anaerobiosis Hypoxia Exercise Cross-Over Studies Hydrogen-Ion Concentration hypoxic chamber moderate simulated altitude acid–base balance Diet potential renal acid load (pral) acid-forming nutrition sports nutrition Dietary Supplements Exercise Test mountain sport disciplines Female Blood Gas Analysis base–forming nutrition lcsh:Nutrition. Foods and food supply Biomarkers |
| Zdroj: | Nutrients, Vol 12, Iss 3, p 688 (2020) Nutrients Volume 12 Issue 3 |
| ISSN: | 2072-6643 |
| Popis: | Pre-alkalization caused by dietary supplements such as sodium bicarbonate improves anaerobic exercise performance. However, the influence of a base-forming nutrition on anaerobic performance in hypoxia remains unknown. Herein, we investigated the effects of an alkalizing or acidizing diet on high-intensity performance and associated metabolic parameters in normoxia and hypoxia. In a randomized crossover design, 15 participants (24.5 ± 3.9 years old) performed two trials following four days of either an alkalizing (BASE) or an acidizing (ACID) diet in normoxia. Subsequently, participants performed two trials (BASE ACID) after 12 h of normobaric hypoxic exposure. Anaerobic exercise performance was assessed using the portable tethered sprint running (PTSR) test. PTSR assessed overall peak force, mean force, and fatigue index. Blood lactate levels, blood gas parameters, heart rate, and rate of perceived exertion were assessed post-PTSR. Urinary pH was analyzed daily. There were no differences between BASE and ACID conditions for any of the PTSR-related parameters. However, urinary pH, blood pH, blood bicarbonate concentration, and base excess were significantly higher in BASE compared with ACID (p < 0.001). These findings show a diet-induced increase in blood buffer capacity, represented by blood bicarbonate concentration and base excess. However, diet-induced metabolic changes did not improve PTSR-related anaerobic performance. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|