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Effects of a Commercial Drink on Acceleration Tolerance and Cognitive Performance.

Author: Thomas B WalkerUlf BalldinJoseph FischerWilliam StormGordon L WarrenAll authors
Publisher: Ft. Belvoir : Defense Technical Information Center, NOV 2009.
Edition/Format:   eBook : English
Database:WorldCat
Summary:
This study examined the ability of a commercial energy drink to enhance acceleration tolerance, strength under G-load, and cognitive performance immediately prior to and following acceleration exposure. Eight experienced centrifuge subjects completed three separate experimental acceleration exposures following ingestion of 11.5 ml/kg body weight of (a) a caffeine-carbohydrate drink, providing 5.0 mg caffeine/kg body  Read more...
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Material Type: Internet resource
Document Type: Internet Resource
All Authors / Contributors: Thomas B Walker; Ulf Balldin; Joseph Fischer; William Storm; Gordon L Warren; AIR FORCE RESEARCH LAB BROOKS CITY-BASE TX HUMAN PERFORMANCE WING (711TH)
OCLC Number: 609998207
Notes: Interim rept. 15 Oct 2008-15 Nov 2009.
Description: 26 pages ; 23 x 29 cm

Abstract:

This study examined the ability of a commercial energy drink to enhance acceleration tolerance, strength under G-load, and cognitive performance immediately prior to and following acceleration exposure. Eight experienced centrifuge subjects completed three separate experimental acceleration exposures following ingestion of 11.5 ml/kg body weight of (a) a caffeine-carbohydrate drink, providing 5.0 mg caffeine/kg body weight, (b) a carbohydrate-only drink or (c) placebo. Each exposure consisted of a relaxed gradual onset run to peripheral light loss, a rapid onset run to 6.0 G for 15 s, and a simulated air combat maneuver (SACM) run of repeated alternations between 4.5 G for 15 seconds and 7 G for 15 seconds until volitional exhaustion. Cognitive tests were performed prior to and after the acceleration profiles. Relaxed G-tolerance was significantly higher under the caffeine session, whereas SACM duration did not differ among the drink conditions. Hip adductor muscle strength was lower during the placebo session than during the other two sessions. Cognitive reaction time was faster post-acceleration than pre-acceleration, and faster under the caffeine condition than the placebo condition. We conclude that consumption of a caffeine-based energy drink enhances relaxed G-tolerance and may increase strength, but does not impact acceleration duration. We further conclude that cognitive reaction time is improved by the caffeine drink, as well as by the acceleration exposure.

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Primary Entity

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