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J Strength Cond Res. 2016 Dec;30(12):3520-3524.

Ingestion of a Nitric Oxide Enhancing Supplement Improves Resistance Exercise Performance.

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1
1Department of Sport and Physical Activity, Edge Hill University, Ormskirk, L39 4QP, UK; and 2Leeds Beckett University, Carnegie School of Sport, Leeds, LS1 3HE, UK.

Abstract

Mosher, SL, Sparks, SA, Williams, EL, Bentley, DJ, and Mc Naughton, LR. Ingestion of a nitric oxide enhancing supplement improves resistance exercise performance. J Strength Cond Res 30 (12): 3520-3524, 2016-Studies have established that supplementation of nitrate increases nitric oxide which in turn improves exercise performance. The current study aimed to investigate the effects of nitrate ingestion on performance of bench press resistance exercise until failure. Twelve recreationally active (age, 21 ± 2 years, height, 177.2 ± 4.0 cm, weight, 82.49 ± 9.78 kg) resistance-trained men participated in the study. The study used a double-blind, randomized cross-over design, where participants ingested either 70 ml of "BEET It Sport" nitrate shot containing 6.4 millimoles (mmol·L) or 400 mg of nitrate or a blackcurrant placebo drink. Participants completed a resistance exercise session, consisting of bench press exercise at an intensity of 60% of their established 1 repetition maximum (1RM), for 3 sets until failure with 2 minutes rest interval between sets. The repetitions completed, total weight lifted, local and general rate of perceived exertion (RPE), and blood lactate were all measured. The results showed a significant difference in repetitions to failure (p ≤ 0.001) and total weight lifted (p ≤ 0.001). However, there were no significant difference between blood lactate over the 2 trials (p = 0.238), and no difference in Local (p = 0.807) or general (p = 0.420) indicators of fatigue as measured by RPE. This study demonstrates that nitrate supplementation has the potential to improve resistance training performance and work output compared with a placebo.

PMID:
27050244
DOI:
10.1519/JSC.0000000000001437
[Indexed for MEDLINE]

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