Dietary nitrate enhances arterial oxygen saturation after dynamic apnea
Patrician A, Schagatay E
Scandinavian journal of medicine & science in sports · 19 citations
Review labels
Neutral facts our review recorded about how this study was done. They describe method, never whether we like the result.
How it was studied
- Design
- Randomized controlled trial (indexed by PubMed)
- Studied in
- People
- Main outcome
- Health markers and function
- Intake measured by
- Food provided by researchers
Who paid for it
- Funding
- Independent funding
- University or hospital
- Centrum för idrottsforskning
- University or hospital
- Centrum for Idrottsforskning
Based on 2 listed funder(s).
Publication
- Published
- 2016-03-31 · Scand J Med Sci Sports · vol. 27 · issue 6 · pp. 622–626
- Publisher
- Wiley
- Cited
- 23 citations · more than 91% of similar papers · 2.8× the field average
- Impact
- Top 10% most cited in its field
- References
- 28 works
- Access
- Open access (repository copy) · OTHER-OA
- Research areas
- Cardiovascular and Diving-Related Complications · Obstructive Sleep Apnea Research · Nitric Oxide and Endothelin Effects
- Keywords
- Hyperventilation, Apnea, Oxygen, Pulse oximetry, Anesthesia, Medicine, Nitrate, Animal science, Heart rate, Oxygen saturation, Chemistry, Cardiology, Internal medicine, Blood pressure, Biology
- MeSH
- humans, nitrates, oximetry, pulmonary gas exchange, cross-over studies, diving, oxygen consumption, heart rate, dietary supplements, adult, male, young adult, breath holding
2 authors
From SE
- Alexander Patrician · correspondingMid Sweden University
- Erika K. A. SchagatayMid Sweden University
Abstract
Breath-hold divers train to minimize their oxygen consumption to improve their apneic performance. Dietary nitrate has been shown to reduce the oxygen cost in a variety of situations, and our aim was to study its effect on arterial oxygen saturation (SaO2 ) after dynamic apnea (DYN) performance. Fourteen healthy male apnea divers (aged 33 ± 11 years) received either 70 mL of concentrated nitrate-rich beetroot juice (BR) or placebo (PL) on different days. At 2.5 h after ingesting the juice, they were asked to perform 2 × 75 m DYN dives in a pool with 4.5-min recovery between dives. Each dive started after 2-min countdown and without any warm-up apneas, hyperventilation, or lung packing. SaO2 and heart rate were measured via pulse oximetry for 90 s before and after each dive. Mean SaO2 nadir values after the dives were 83.4 ± 10.8% with BR and 78.3 ± 11.0% with PL (P 2 was 86.3 ± 10.6% with BR and 79.4 ± 10.2% with PL (P 2 after 75-m DYN. These results suggest an oxygen conserving effect of dietary nitrate supplementation, which likely has a positive effect on maximal apnea performance.
Abstract via Europe PMC. Copyright remains with the authors or publisher.
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