Skip to main page content
Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
, 7, 14

Improved Time to Exhaustion Following Ingestion of the Energy Drink Amino Impact


Improved Time to Exhaustion Following Ingestion of the Energy Drink Amino Impact

Allyson L Walsh et al. J Int Soc Sports Nutr.


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% VO2 max) to exhaustion. Mean VO2 was 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.


Figure 1
Figure 1
Time to Exhaustion. * = significant difference between groups.

Similar articles

See all similar articles

Cited by 15 PubMed Central articles

See all "Cited by" articles


    1. Froiland K, Koszewski W, Hingst J, Kopecky L. Nutritional supplement use among college athletes and their sources of information. Int J Sports Nutr Exerc Metab. 2004;14:104–120. - PubMed
    1. Hoffman JR, Faigenbaum AD, Ratamess NA, Ross R, Kang J, Tenenbaum G. Nutritional supplementation and anabolic steroid use in adolescents. Med Sci Sports and Exerc. 2008;40:15–24. - PubMed
    1. Desbrow B, Leveritt M. Awareness and use of caffeine by athletes competing at the 2005 Ironman Triathlon World Championships. Int J Sport Nutr Exerc Metab. 2006;16:545–558. - PubMed
    1. Petroczi A, Naughton Dp, Pearce G, Bailey R, Bloodworth A, McNamee MJ. Nutritional supplement use by elite young UK athletes: fallacies of advice regarding efficacy. J Int Soc Sports Nutr. 2008;5:22. doi: 10.1186/1550-2783-5-22. - DOI - PMC - PubMed
    1. Bruce CR, Anderson ME, Fraser SF, Stepto NK, Klein R, Hopkins WG, Hawley JA. Enhancement of 2000-m rowing performance after caffeine ingestion. Med Sci Sports Exerc. pp. 1958–1963. - PubMed

LinkOut - more resources