Improved time to exhaustion following ingestion of the energy drink Amino Impact™

Background: the purpose of this study was to examine the effect of a commercially available energy drink on time to exhaustion during treadmill exercise. in addition,subjective measures of energy,focus,and fatigue were examined. methods: fifteen subjects (9 men and 6 women; 20.9 ± 1.0 y; 172.1 ± 9.1 cm; 71.0 ± 9.4 kg; 16.9 ± 9.7% body fat) underwent two testing sessions administered in a randomized,double-blind fashion. subjects reported to the laboratory in a 3-hr post-absorptive state and were provided either the supplement (sup; commercially marketed as amino impact™) or placebo (p). during each laboratory visit subjects performed a treadmill run (70% vo2max) to exhaustion. mean vo2was measured during each endurance exercise protocol. subjects were required to complete visual analog scales for subjective measures of energy,focus and fatigue at the onset of exercise (pre),10-mins into their run (ex10) and immediately post-exercise (ip).results: time to exhaustion was significantly greater (p = 0.012) during sup than p. subjects consuming the supplement were able to run 12.5% longer than during the placebo treatment. subjects consuming sup reported significantly greater focus (p = 0.031),energy (p = 0.016),and less fatigue (p = 0.005) at pre. significant differences between groups were seen at ex10 for focus (p = 0.026) and energy (p = 0.004),but not fatigue (p = 0.123). no differences were seen at ip for either focus (p = 0.215),energy (p = 0.717) or fatigue (p = 0.430).conclusions: results of this study indicate that the supplement amino impact™ can significantly increase time to exhaustion during a moderate intensity endurance run and improve subjective feelings of focus,energy and fatigue. © 2010 walsh et al; licensee biomed central ltd.