The Acute effects of a multi-ingredient pre-workout supplement on markers of clinical health and exercise performance in active females
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Multi-ingredient pre-workout supplements (MIPS) are consumed with the belief of enhancing exercise performance, but research has primarily dealt with male subjects. The purpose of this study was to examine the acute effects of ingesting a MIPS on active females. Fifteen females participated in a randomized, double-blind, placebo controlled cross-over design study. Subjects reported to the laboratory for a familiarization, baseline, and two experimental testing sessions. Experimental testing included REB, heart rate, and blood pressure. Also, muscular endurance was assessed by performing a set to failure on back squat and bench press (BP) at 85% of their 5-repetition maximum. Anaerobic power was assessed using a counter-movement vertical jump test and a nonmotorized fOrce treadmill sprint test. Subjective measurements were assessed using a 5- point Likert scale. A significant main effect for condition was observed for REE (p~0.021), diastolic blood pressure (p~O.Oil), BP repetitions (p=0.037), and total work (p=0.039) following ingestion of the MIPS. A significant condition x time interaction was observed regarding feelings of fOcus at 80-minutes post ingestion (p=0.046). In conclusion, the current study suggests that consumption of a MIPS significantly increased REE, diastolic blood pressure, upper body muscular endurance, total work completed, and produced an increase in feelings of focus.