PMID- 11822474
OWN - NLM
STAT- MEDLINE
DCOM- 20020702
LR  - 20081121
IS  - 1439-6319 (Print)
IS  - 1439-6319 (Linking)
VI  - 86
IP  - 2
DP  - 2001 Dec
TI  - Single and choice reaction time during prolonged exercise in trained subjects: 
      influence of carbohydrate availability.
PG  - 150-6
AB  - The aim of the present study was to examine the effects of prolonged exercise at 
      the ventilatory threshold and carbohydrate ingestion on single (SRT) and choice 
      (CRT) reaction time. Eight well-trained triathletes completed three testing 
      sessions within a 3-week period. Maximal oxygen uptake was determined in the 
      first test, whereas the second and the third sessions were composed of a 100-min 
      run (treadmill 15 min, overground 70 min, treadmill 15 min) performed at the 
      velocity associated with the ventilatory threshold. During these submaximal 
      tests, the subjects ingested (in random order) 8 ml x kg(-1) body weight of 
      either a placebo (Pl) or 5.5% carbohydrate (CHO) solution prior to the first 
      submaximal run and 2 ml x kg(-1) body weight every 15 min after that. The 
      cognitive tasks were performed before and after exercise for CRT, and before, 
      during each submaximal run and after exercise for SRT. Furthermore, at the end of 
      each submaximal test subjects were asked to report their rating of perceived 
      exertion (RPE). Results showed a significant positive effect of CHO ingestion on 
      RPE and CRT performance at the end of exercise, while no effect of exercise 
      duration was found in the Pl condition. After a 100-min run, during the CHO 
      condition, CRT mean (SD) group values decreased from 688.5 (51) ms to 654 (63) 
      ms, while during the Pl condition, RPE mean group values increased from 11 (2) to 
      16 (1.02) and CRT mean values remained stable [688 (104) ms vs 676 (73.4) ms, P > 
      0.05]. No similar effect was observed for SRT. These results suggest that 
      CHO-electrolyte ingestion during a 100-min run results in an improvement in the 
      complex cognitive performance measured at the end of that run.
FAU - Collardeau, M
AU  - Collardeau M
AD  - Unite Ergonomie Sportive et Performance, Universite de Toulon-Var, La Garde, 
      France.
FAU - Brisswalter, J
AU  - Brisswalter J
FAU - Vercruyssen, F
AU  - Vercruyssen F
FAU - Audiffren, M
AU  - Audiffren M
FAU - Goubault, C
AU  - Goubault C
LA  - eng
PT  - Clinical Trial
PT  - Journal Article
PT  - Randomized Controlled Trial
PL  - Germany
TA  - Eur J Appl Physiol
JT  - European journal of applied physiology
JID - 100954790
RN  - 0 (Carbohydrates)
SB  - IM
MH  - Adult
MH  - Biological Availability
MH  - Carbohydrates/*pharmacokinetics
MH  - Choice Behavior/*physiology
MH  - Cognition/physiology
MH  - Exercise/*physiology
MH  - Humans
MH  - *Physical Education and Training
MH  - *Physical Endurance/*physiology
MH  - Physical Exertion
MH  - Reaction Time
MH  - Self Concept
EDAT- 2002/02/02 10:00
MHDA- 2002/07/03 10:01
CRDT- 2002/02/02 10:00
PHST- 2002/02/02 10:00 [pubmed]
PHST- 2002/07/03 10:01 [medline]
PHST- 2002/02/02 10:00 [entrez]
AID - 10.1007/s004210100513 [doi]
PST - ppublish
SO  - Eur J Appl Physiol. 2001 Dec;86(2):150-6. doi: 10.1007/s004210100513.