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OXYSTORM, 07 Jun 2021
Published on : Sports (Basel) . 2017 Oct 16;5(4):80. doi: 10.3390/sports5040080.
Red Spinach Extract Increases Ventilatory Threshold during Graded Exercise Testing
Angelique N Moore , Cody T Haun , Wesley C Kephart , Angelia M Holland , Christopher B Mobley , David D Pascoe , Michael D Roberts 8, Jeffrey S Martin
PMID: 29910440 PMCID: PMC5969023 DOI: 10.3390/sports5040080
Background: We examined the acute effect of a red spinach extract (RSE) (1000 mg dose; ~90 mg nitrate (NO 3 – )) on performance markers during graded exercise testing (GXT).
Methods: For this randomized, double-blind, placebo (PBO)-controlled, crossover study, 15 recreationally-active participants (aged 23.1 ± 3.3 years; BMI: 27.2 ± 3.7 kg/m²) reported >2 h post-prandial and performed GXT 65⁻75 min post-RSE or PBO ingestion. Blood samples were collected at baseline (BL), pre-GXT (65⁻75 min post-ingestion; PRE), and immediately post-GXT (POST). GXT commenced with continuous analysis of expired gases.
Results: Plasma concentrations of NO 3 – increased PRE (+447 ± 294%; p < 0.001) and POST (+378 ± 179%; p < 0.001) GXT with RSE, but not with PBO (+3 ± 26%, -8 ± 24%, respectively; p > 0.05). No effect on circulating nitrite (NO 2 – ) was observed with RSE (+3.3 ± 7.5%, +7.7 ± 11.8% PRE and POST, respectively; p > 0.05) or PBO (-0.5 ± 7.9%, -0.2 ± 8.1% PRE and POST, respectively; p > 0.05). When compared to PBO, there was a moderate effect of RSE on plasma NO 2 – at PRE (g = 0.50 [-0.26, 1.24] and POST g = 0.71 [-0.05, 1.48]). During GXT, VO₂ at the ventilatory threshold was significantly higher with RSE compared to PBO (+6.1 ± 7.3%; p < 0.05), though time-to-exhaustion (-4.0 ± 7.7%; p > 0.05) and maximal aerobic power (i.e., VO₂ peak; -0.8 ± 5.6%; p > 0.05) were non-significantly lower with RSE.
Conclusions: RSE as a nutritional supplement may elicit an ergogenic response by delaying the ventilatory threshold.
https://pubmed.ncbi.nlm.nih.gov/29910440/
https://www.mdpi.com/2075-4663/5/4/80
http://libmast.utm.my/Record/doaj-art-5b35db5154c9409ab55672af09976b13
Keywords
- amaranthus
- exercise
- nitrate
- NO
- NO2
- oxystorm
- red spinach
- sports
- ventilatory threshold
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