The effects of a commercial liquid energy supplement on physical performance, reaction time, and mood state in college-aged males and females

Methods Nineteen subjects (n=19; 8 male, 11 female; age 22.42 ± 3.15 years; body mass: 68.95 ± 12.70 kg; BMI: 23.86 ± 2.85; ht: 168.7 cm) volunteered to participate in the study. All test subjects completed a health history and medical questionnaire, as well as an informed consent form, prior to participation. Participants completed pre and post-testing, consisting of the following: Profile of Mood States (POMS) Questionnaire, countermovement vertical jump, YMCA Bench press test, sit-ups to fatigue, DynavisionTM reaction test, and a 20-meter sprint repeat test. The pre and posttest sessions were conducted with a period of 48 hours between. Thirty minutes prior to post-testing, subjects ingested a serving (2oz) of the pre-exercise energy supplement (Redline Powershot by VPX) or a placebo. Administration of the supplement was double blind. Ten (n=10) participants received the supplement, while nine (n=9) participants received the placebo. A paired samples t-test was used to determine between group differences for the selected assessments, at an alpha level of 0.05.