Date of Award

January 2015

Degree Type

Open Access Thesis

Degree Name

Master of Science (MS)


Exercise and Sport Science

First Advisor

Michael T. Lane

Department Affiliation

Exercise and Sport Science

Second Advisor

Jack Rutherford

Department Affiliation

Exercise and Sport Science

Third Advisor

Heather R. Adams-Blair

Department Affiliation

Exercise and Sport Science


Introduction: The current research in power production has shown the use of pre-workout supplements to increase peak power production, but the current research has not yet been able to delve in to the effectiveness of pre-workout supplementation on maintaining power production.

Purpose: The purpose of this study was to examine the effects on acute power production enhancement and maintenance due to supplementation in recreationally trained college aged individuals.

Methods: Data was collected from 13 recreationally trained, college-aged males in a double-blind crossover study. After a familiarization sessions subjects participated in three testing sessions utilizing a cross over double blind design (Supplement, Placebo+Caffeine and Placebo). Subjects arrived and ingested their beverage and after waiting 20 minutes performed a warm up and then vertical jump testing (5 jumps). Subjects then performed ten bike sprints utilizing a Monark ergo bike, with each subject’s resistance being 7.5% of their body weight in kg. Each sprint last 5 seconds with a 55 second recovery. Subjects then performed another round of vertical jumps utilizing a Vertec. Blood lactate samples were taken both before the Wingate protocol and after. Each subject’s perceived level of energy, focus, fatigue and anxiety/restlessness was self reported on a visual analog scale (VAS) once upon arrival, 20 minutes after ingestion of the treatment, and after the completion of the Wingate protocol.

Results: Age: 23.3+4.2 (years), Height, 69+2.9 (inches); Weight, 199.6+33.9 (pounds); Body Fat, 21.6+8.9 (%); Fat Free Mass, 155.2+23.5 (pounds); and Reach, 87.2+4.5 (inches). The supplement treatment resulted in the highest average maximum (Supp: 783.1+155.7, PL+Caff: 769.8+166.5, PL: 778.2+165.8) and mean (Supp: 705+143.7, PL+Caff: 694.6+157.2, PL: 702.1+153.6) power outputs during the Wingate protocol. The results from the lactate test were F (1, 36) = 121.942 p<0.0001, post hoc utilizing LSD resulted in significance (P=0.029), in that the placebo + caffeine treatment showed an higher increase in pre to post Wingate lactate compared to the other two treatments. VAS results showed the supplement treatment resulted in a higher average level of perceived energy and focus, as well as a lower average level of perceived fatigue both 20 minutes after ingestion of the treatments and after the Wingate bike test compared to the subject’s arrival for testing.

Discussion: The results suggest the pre-workout supplement, Assault Black, may increase an individual’s average maximum and average mean power production during acute, high intensity physical activity. The results also suggest the supplement provides an increase in an individual’s average feeling of energy and focus as well as lowers the individual’s average level of fatigue. Even though the increases are not statistical significant during this acute study, these increases in performance, even though small, can possibly accumulate over time, adding up to larger performance increases with time.