Thursday-Abstracts

Official Journal of the American College of Sports Medicine
point system. One point deductions were assigned on SLF for 5 knots± on airspeed,
100ft± on altitude, or 5 degrees± in heading. Total time (s) for CT was recorded across
3 segments.
rEsuLTs: There were a higher number of total penalty points on SLF with the ED
vs. the placebo (P) in the MED (ED 58.4±9.2 vs. P 34.0 ±6.6, p .05, respectively). Time to complete CT was higher for
P in MED vs. HI (349.4±26.5s vs. 279.1±17.5s, p 0.05) in time to complete CT between ED and P or MED vs. HI.
CONCLusIONs: With highly technical flight skills requiring precision, coordination
and sequencing of movements, EDs may reduce overall performance. Athletes and
pilots should cautiously interpret claims for the performance enhancing effects of
energy drinks when shifting focus and technical motor skills are involved.
1102 Board #47 May 30, 8:00 AM - 9:30 AM
The Effects of a supplement designed to attenuate the
adverse Effects of Fatigue
Adam J. Wells, Adam M. Gonzalez, Gerald T. Mangine, Nadia
S. Emerson, William P. McCormack, Adam R. Jajtner, Jeremy R.
Townsend, Tyler C. Scanlon, Edward H. Robinson, IV, Jeffrey
R. Stout, FACSM, Jay R. Hoffman, FACSM, Maren S. Fragala.
University of Central Florida, Orlando, FL.
(No relationships reported)
Phosphatidylserine (PS) supplementation may play a role in attenuating the adverse
effects of physical fatigue on cognition, mood, and motor function. However, the
results from recent investigations remain equivocal.
PurPOsE: To examine the effect of ingesting a supplement (S) containing PS (400
mg·day-1) and caffeine (100 mg·day-1) for 14 days, on measures of cognitive function
(CF), reaction time (RT), and mood (MD), following an acute exercise stress.
METhOds: Twenty-one recreationally trained men and women (age: 22.5 ± 3.4
yrs; height: 1.76 ± 1.0 m; weight: 77.6 ± 12.6 kg; body fat: 14.6 ± 6.6 %) volunteered
for this double-blind, controlled study. Participants completed two acute bouts of
resistance exercise (T1 and T2), separated by two weeks of supplementation with S or
control (C). Measures of RT (Dynavision D2), CF (Serial Subtraction Test), and MD
(Profile of Mood States) were assessed pre and post exercise at T1 and T2. A 2 x 2
(time x treatment) repeated measures analysis of variance was used to analyze the data.
rEsuLTs: When collapsed across groups, a significant decrease (p = 0.05) in RT
performance (# of strikes) was seen in the 60-second reaction drill from pre to post
exercise at T1. All other RT tests were similar from pre to post exercise at T1. RT was
not significantly changed in response to PS (p > 0.05), and no significant between
group differences were noted at T2. When collapsed across groups, a significant
increase in the number of correct answers, and a significant decrease in time to answer
was seen from pre to post workout at T1 (p = 0.004 and p = 0.007, respectively) and T2
(p = 0.004 and 0.018, respectively) in the CF test. A significant increase in total mood
score was observed for C but not for S (p = 0.034). Additionally, C experienced a 13%
greater increase (p = 0.031) in pre to post exercise perception of fatigue compared to S.
A significant decrease in confusion was observed in S at T2 (p = 0.041).
CONCLusION: Ingestion of 400 mg·day-1 of PS and 100 mg·day-1 of caffeine for
14-days appears to attenuate post-exercise MD scores and perception of fatigue, but
does not improve reaction time in recreationally trained individuals following acute
resistance exercise. An acute bout of resistance exercise may improve CF; however, PS
provides no further benefit.
1103 Board #48 May 30, 8:00 AM - 9:30 AM
Physiological responses To a Thermogenic Nutritional
supplement during rest, Exercise, and recovery In Women
Haley C. Bergstrom 1 , Terry J. Housh, FACSM 1 , Daniel A.
Traylor 1 , Robert W. Lewis Jr. 1 , Glen O. Johnson, FACSM 1 ,
Richard J. Schmidt 1 , Dona J. Housh, FACSM 2 , Nathaniel D.M.
Jenkins 1 , Kristen C. Cochrane 1 . 1 University of Nebraska-Lincoln,
Lincoln, NE. 2 University of Nebraska Medical Center, Lincoln,
NE.
(No relationships reported)
PurPOsE: The purpose of this study was to examine the acute physiological
responses to a thermogenic nutritional supplement at rest, during low-intensity
exercise, and recovery from exercise in women.
METhOds: Twelve recreationally active women (mean ± SD; age, 22.9 ± 3.1
years) were recruited for this randomized, double-blinded, placebo-controlled,
crossover study. The nutritional supplement capsules included 200 mg caffeine, 100
mg capsicum extract, 2 mg piperine, 250 mg boswellia serrate extract, 500 mg dried
ginger root, 100 mg cinnamon bark, 20 mg niacin, and 500 mg macuna pruriens. The
placebo capsules were matched in size and appearance and contained microcrystalline
cellulose. Each testing session consisted of 4 phases: 1) 30 min of initial resting
measures, followed by ingestion of the placebo or thermogenic nutritional supplement;
2) 50 min of post-supplementation resting; 3) 60 min of treadmill walking (3.2 – 4.8
Vol. 45 No. 5 Supplement S203
km·hr-1); and 4) 50 min of post-exercise resting. Indirect calorimeter was used to
measure energy expenditure (EE) and oxygen consumption rate (VO2). The EE and
VO2 variables were recorded and reported as 10 min averages. During exercise, the
rating of perceived exertion (RPE) was recorded every 15 min. Statistical analyses
included separate 2-way repeated-measures ANOVAs (condition x time), 1-way
repeated-measures ANOVAs, and paired t-tests (p < 0.05).
rEsuLTs: There were no significant differences for any of the measures between
the supplement and placebo groups during the initial 30 min resting or the 50 min
post-supplementation time periods. During exercise, EE was 3 to 4% greater for the
supplement than the placebo at each 10 min average, with no significant differences in
RPE. Post-exercise, EE was 5 to 7% greater for the supplement group than the placebo
group at 10, 20, and 40 min, VO2 was 5% greater at 20 min and 4% greater at 40 min.
CONCLusION: The current findings
indicated that the thermogenic nutritional supplement increased EE and VO 2 with
no effect on RPE. These findings suggested that supplementation with the blend of
ingredients in the thermogenic nutritional supplement may aid in a weight management
program that includes long duration (60 min) low intensity (walking) exercise.
This study was supported by a clinical trial grant from General Nutrition Corporation.
1104 Board #49 May 30, 8:00 AM - 9:30 AM
Effects of acute Caffeine Intake on Wingate Test
Performance in a Creatine supplemented state
Andrew M. Seaton1 , Charles R.C Marks1 , Mark J. Seaton1 ,
Hermann J. Engels, FACSM2 , Tamara Hew-Butler, FACSM1 .
1 2 Oakland University, Rochester, MI. Wayne State University,
Detroit, MI.
(No relationships reported)
PurPOsE: This study investigated the effects of acute caffeine consumption on
supramaximal exercise performance in a creatine monohydrate supplemented state.
METhOds: Fourteen college age adults (age: 23.9±4.3 years; weight: 69.6±11.6
kg; height: 171.9±8.1 cm) on a supplement-free diet performed a standard leg cycle
ergometry Wingate test (WanT) to establish baseline (C0) performance characteristics
for peak anaerobic power (watts/kg; PAP), mean anaerobic power (watts/kg; MAP),
and rate of fatigue (%; RF). Participants then underwent a creatine monohydrate
supplementation intervention in the form of a 6 day loading phase (20 g/day)
followed by a 3 day maintenance phase (5 g/day). Using a double-blind protocol and a
randomized test order, at the beginning and conclusion of the maintenance phase, each
subject completed a WanT 60 min after the acute intake of a placebo (C1) or 6 mg/kg
caffeine (C2). Data were analyzed with a one-way repeated measure ANOVA (alpha <
.05) and using protected paired t tests (Bonferroni - Holm’s sequential adjustment) for
post hoc analysis (SPSS v14.0).
rEsuLTs: There was a significant main effect (p 0.05) for RF (C0 = 46.1 ± 8.0 %; C1 = 50 ± 4.9
%; C2 = 51.3 ± 7.1 %) and MAP (C0 = 3.1 ± 0.6 W/kg; C1 = 3.1 ± 0.7 W/kg; C2 = 3.2
± 0.6 W/kg).
CONCLusION: The present data indicate 6 mg/kg acute caffeine consumption does
not significantly affect creatine monohydrate loading’s impact on PAP, MAP, or RF
during a WanT.
1105 Board #50 May 30, 8:00 AM - 9:30 AM
The Effects of Caffeine on Time to Exhaustion during
Treadmill running
Amanda Locke, Kevin Sartin, Danny Accola, Steve Burns.
University of Central Missouri, Warrensburg, MO. (Sponsor:
Michael Godard, FACSM)
(No relationships reported)
Caffeine is often used to enhance athletic performance. Today, committees are
questioning if it should be a substance banned during competition.
PurPOsE: The primary purpose of this study was to determine the effect caffeine
had on the time until exhaustion while running.
METhOds: Participants included 8, moderately active males (22.0 ± 1.7 years, 184.9
±5.3 cm, 83.8 ±11.4 kg). Subjects reported to the lab on 3 separate occasions, with
no less than 48 hours of rest in between each visit. On the first visit, subjects ran on
a treadmill to determine their max heart rate. This was done by increasing the speed
until volitional exhaustion; the final speed and heart rate are considered maximums.
They returned to the lab two additional times and ran at 70% of their max heart rate,
determined during the first visit, for 15 minutes. Immediately after the 15 minutes
concluded, the treadmill speed was increased to the final speed at which exhaustion
was reached during trial one. This pace was maintained until volitional exhaustion. On
one occasion subjects were given water with caffeine (5mg/kg) and on the other water
without caffeine 45 min prior to each run. Rate Perceived Exertion (RPE) was recorded
every 5 minutes and after the exhaustive bout. Blood lactate was sampled immediately
Abstracts were prepared by the authors and printed as submitted.
Thursday, May 30, 2013