Details

Program Category	Poster/Oral Presentation
Program Date/Time	2015/05/16 (Sat) 15:30-16:00
Room	Exhibition Hall
Program No.	PS-02-p-069
Session	Nutritional Physiology 4
Title	Psychostimulant vs. Motor Effects of VIA Instant Coffee
Author	Alixandra H Fidler, Jesse White, Allison Feucht, Derek Hosier, Amanda Wise, Sean Mohney, Lonnie Lowery
Affiliation	University of Mount Union, USA
Abstract	Objectives As one of the most popular beverages worldwide, coffee’s psychostimulant effects are well known but whether these correlate with neuromuscular performance is less understood. We tested a highly caffeinated coffee product, Via^® instant coffee (VIA) vs. its decaffeinated version (DCF). We hypothesized that psychometric tests would correlate positively with explosive performance changes in the Smith bench press. A total of 23 resistance-trained (6.4±3.7 y) college students (21.2+3.7 y) were tested. Materials & Methods After 24 hours of dietary control and caffeine abstinence, fasted subjects performed three separate repetitions of strict Smith bench press under two conditions (VIA, DCF), with conditions separated by 48-72 hours. Simple psychometric tests (Alertness [ALT], Focus [FOC] and sense of energy [ENR]; Likert-type questionnaire) were given. Peak force (FOR), peak power (POW), peak velocity (VEL), and maximum rate of force development (RFD) were measured via Ballistic Measurement System (BMS) linear displacement (XPV6+, Innervations, Inc., South Australia, Australia).The relationships between psychometric and neuromuscular variables were analyzed via Pearson correlation coefficients (Statistica 12, Statsoft, Inc., Tulsa, OK). Results & Findings No linear correlations were observed among any of the variables tested (p>0.05). For example, sense of energy enhancement was not related to FOR (r=-0.17; p=0.44), POW (r=0.06; p=0.77), VEL (r=0.22; p=0.30), or RFD (r=0.34; p=0.11). Data plots suggest a nonlinear relationship. Conclusion These preliminary data do not support our hypothesis and suggest perceptual enhancements after drinking VIA do not transfer to neuromuscular performance in a linear fashion. Future research should include non-linear analyses and psychometric scales using continuous (instead of discrete, Likert-type) data. Further, persons in the workforce whose labor requires brief application of force should be studied. Athletes with a more-is-better mentality should use caution when using dietary stimulants such as VIA, which may misleadingly provide perceptual but not neuromuscular stimulation.
Keywords	Coffee, Psychostimulant, Neuromuscular