Influence of Sex and Acute Beetroot Juice Supplementation on 2 KM Running Performance
Source abstract
Abstract
Purpose: To assess the effect of acute nitrate-rich (BJ) and nitrate-depleted (PL) beetroot juice ingestion on 2 km running performance in amateur runners, and to what extent the ergogenic effect of BJ supplementation would be influenced by the sex of the participants; Methods: Twenty-four amateur long-distance runners (14 males and 10 females) performed a 2 km time trial (TT) on an outdoor athletics track 2.5 h after ingesting either 140 mL of BJ (~12.8 mmol NO3−) or PL. After the tests, blood [lactate] and ratings of perceived exertion (RPE) related to the leg muscles (RPEmuscular), cardiovascular system (RPEcardio) and general overall RPE (RPEgeneral) were assessed; Results: Compared to PL, BJ supplementation improved 2 km TT performance in both males (p < 0.05) with no supplement × sex interaction effect (p > 0.05). This improvement in 2 km running performance was a function of improved performance in the second 1 km split time in both males and females (p < 0.05). Supplementation with BJ did not alter post-exercise blood [lactate] (p > 0.05) but lowered RPEgeneral (p < 0.05); Conclusions: acute BJ supplementation improves 2 km running performance in amateur runners by enhancing performance over the second half of the TT and lowering RPEgeneral by a comparable magnitude in males and females.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Cardiovascular and exercise physiology · Muscle metabolism and nutrition · Pharmacology and Obesity Treatment
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Centre for Sport Studies, Rey Juan Carlos University, 28993 Madrid, Spain
Escuela Universitaria de Osuna (Centro adscrito a la Universidad de Sevilla), Universidad de Sevilla, 41640 Sevilla, Spain
Departamento de Educación Física y Deporte, Universidad de Sevilla, 41013 Sevilla, Spain
Studies Research Group in Neuromuscular Responses (GEPREN), University of Lavras, 37200-000 Lavras, Brazil
School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough LE11 3TU, UK
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