PMID- 17024464
OWN - NLM
STAT- MEDLINE
DCOM- 20070529
LR  - 20181113
IS  - 1439-6319 (Print)
IS  - 1439-6319 (Linking)
VI  - 99
IP  - 1
DP  - 2007 Jan
TI  - Effects of acute carbohydrate supplementation during sessions of high-intensity 
      intermittent exercise.
PG  - 57-63
AB  - The present study evaluated the acute effects of carbohydrate supplementation on 
      heart rate (HR), rate of perceived exertion (RPE), metabolic and hormonal 
      responses during and after sessions of high-intensity intermittent running 
      exercise. Fifteen endurance runners (26 +/- 5 years, 64.5 +/- 4.9 kg) performed 
      two sessions of intermittent exercise under carbohydrate (CHO) and placebo (PLA) 
      ingestion. The sessions consisted of 12 x 800 m separated by intervals of 1 min 
      30 s at a mean velocity corresponding to the previously performed 3-km time 
      trial. Both the CHO and PLA sessions were concluded within approximately 28 min. 
      Blood glucose was significantly elevated in both sessions (123.9 +/- 13.2 mg 
      dl(-1) on CHO and 147.2 +/- 16.3 mg dl(-1) on PLA) and mean blood lactate was 
      significantly higher in the CHO (11.4 +/- 4.9 mmol l(-1)) than in the PLA 
      condition (8.4 +/- 5.1 mmol l(-1)) (P < 0.05). The metabolic stress induced by 
      the exercise model used was confirmed by the elevated HR (approximately 182 bpm) 
      and RPE (approximately 18 on the 15-point Borg scale) for both conditions. No 
      significant differences in plasma insulin, cortisol or free fatty acids were 
      observed during exercise between the two trials. During the recovery period, free 
      fatty acid and insulin concentrations were significantly lower in the CHO trial. 
      Supplementation with CHO resulted in higher lactate associated with lipolytic 
      suppression, but did not attenuate the cortisol, RPE or HR responses.
FAU - de Sousa, Maysa Vieira
AU  - de Sousa MV
AD  - Faculty of Pharmaceutical Sciences, Department of Food and Experimental 
      Nutrition, University of Sao Paulo, Sao Paulo, SP, Brazil. maysavs@uol.com.br
FAU - Simoes, Herbert Gustavo
AU  - Simoes HG
FAU - Oshiiwa, Marie
AU  - Oshiiwa M
FAU - Rogero, Marcelo Macedo
AU  - Rogero MM
FAU - Tirapegui, Julio
AU  - Tirapegui J
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20061006
PL  - Germany
TA  - Eur J Appl Physiol
JT  - European journal of applied physiology
JID - 100954790
RN  - 0 (Dietary Carbohydrates)
RN  - 0 (Fatty Acids, Nonesterified)
RN  - 0 (Insulin)
RN  - 0 (Lactates)
RN  - WI4X0X7BPJ (Hydrocortisone)
SB  - IM
MH  - Adult
MH  - Dietary Carbohydrates/*administration & dosage
MH  - *Dietary Supplements
MH  - Exercise/*physiology
MH  - Fatty Acids, Nonesterified/blood
MH  - Heart Rate/physiology
MH  - Humans
MH  - Hydrocortisone/blood
MH  - Insulin/blood
MH  - Lactates/blood
MH  - Physical Endurance/physiology
MH  - Physical Exertion/physiology
MH  - Running/*physiology
EDAT- 2006/10/07 09:00
MHDA- 2007/05/30 09:00
CRDT- 2006/10/07 09:00
PHST- 2006/09/15 00:00 [accepted]
PHST- 2006/10/07 09:00 [pubmed]
PHST- 2007/05/30 09:00 [medline]
PHST- 2006/10/07 09:00 [entrez]
AID - 10.1007/s00421-006-0317-3 [doi]
PST - ppublish
SO  - Eur J Appl Physiol. 2007 Jan;99(1):57-63. doi: 10.1007/s00421-006-0317-3. Epub 
      2006 Oct 6.