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- W2619080328 abstract "PURPOSE: We sought to determine if a multi-ingredient pre-workout supplement (PWS) given prior to resistance exercise was effective in increasing post-workout reactive hyperemia compared to placebo (PBO). METHODS: Thirty, recreationally trained males participated in this double-blinded, PBO controlled study. All participants reported for two visits, separated by one week. At visit 1, participants consumed a multi-ingredient PWS with seventeen active ingredients (including citrulline, norvaline, caffeine, creatine and anti-oxidant blends) or PBO. 45-min after consumption of PWS/PBO, participants performed four sets of leg extension resistance exercise to failure at 30 or 80% of their 1-RM. At visit 2, subjects consumed the same supplement as in visit 1, but exercised at the alternate intensity. Heart rate (HR), blood pressures, and femoral artery blood flow were assessed at baseline (BL), 45-min following PWS/PBO consumption (PRE), and at 5-min following the last set of resistance exercise (POST). Repeated measures ANOVA was performed with time, supplement, and training intensity as the independent variables. Data are reported as mean ± sem. RESULTS: Significant main effects of time (P<0.01), but no interactions were observed for blood pressures, femoral artery diameter, and retrograde femoral artery blood flow. A significant time*supplement interaction (P<0.05) was observed for HR and antegrade and mean femoral artery blood flow. Change in HR from BL and PRE to the POST time point was significantly greater in the PWS group compared to the PBO group (+27.3±2.5 vs. +19.8±2.2 bpm and +34.6±2.1 vs. +25.0±2.3 bpm for change from BL and PRE, respectively; P<0.03). Similarly, change in mean femoral artery blood flow from BL and PRE to the POST time point was significantly greater in the PWS group compared to the PBO group (+590±56 vs. +404±52 mL/min and +687±60 vs. +484±50 mL/min for change from BL and PRE, respectively; P<0.02). CONCLUSIONS: The PWS did increase the reactive hyperemia response observed following resistance exercise though no specific interactions with the intensity of the resistance exercise were observed. Funding was provided through a gift-in-kind to M.D.R from FutureCeuticals, Inc. (Momence, IL, USA) and through a contract to J.S.M. through Maximum Human Performance (West Caldwell, NJ, USA)." @default.
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- W2619080328 date "2017-05-01" @default.
- W2619080328 modified "2023-09-25" @default.
- W2619080328 title "Effects of a Pre-Workout Supplement on Hyperemia Following Leg Extension Resistance Exercise at Different Intensities" @default.
- W2619080328 doi "https://doi.org/10.1249/01.mss.0000517053.94521.e0" @default.
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