PMID- 3571097
OWN - NLM
STAT- MEDLINE
DCOM- 19870616
LR  - 20171213
IS  - 8750-7587 (Print)
IS  - 0161-7567 (Linking)
VI  - 62
IP  - 3
DP  - 1987 Mar
TI  - Improvements in exercise performance: effects of carbohydrate feedings and diet.
PG  - 983-8
AB  - In an effort to determine the effects of carbohydrate (CHO) feedings immediately 
      before exercise in both the fasted and fed state, 10 well-trained male cyclists 
      [maximum O2 consumption (VO2 max), 4.35 +/- 0.11 l/min)] performed 45 min of 
      cycling at 77% VO2 max followed by a 15-min performance ride on an isokinetic 
      cycle ergometer. After a 12-h fast, subjects ingested 45 g of liquid carbohydrate 
      (LCHO), solid carbohydrate confectionery bar (SCHO), or placebo (P) 5 min before 
      exercise. An additional trial was performed in which a high-CHO meal (200 g) 
      taken 4 h before exercise was combined with a confectionery bar feeding (M + 
      SCHO) immediately before the activity. At 10 min of exercise, serum glucose 
      values were elevated by 18 and 24% during SCHO and LCHO, respectively, compared 
      with P. At 0 and 45 min no significant differences were observed in muscle 
      glycogen concentration or total use between the four trials. Total work produced 
      during the final 15 min of exercise was significantly greater (P less than 0.05) 
      during M + SCHO (194,735 +/- 9,448 N X m), compared with all other trials and 
      significantly greater (P less than 0.05) during LCHO and SCHO (175,204 +/- 11,780 
      and 176,013 +/- 10,465 N X m, respectively) than trial P (159,143 +/- 11,407 N X 
      m). These results suggest that, under conditions when CHO stores are less than 
      optimal, exercise performance is enhanced with the ingestion of 45 g of CHO 5 min 
      before 1 h of intense cycling.(ABSTRACT TRUNCATED AT 250 WORDS)
FAU - Neufer, P D
AU  - Neufer PD
FAU - Costill, D L
AU  - Costill DL
FAU - Flynn, M G
AU  - Flynn MG
FAU - Kirwan, J P
AU  - Kirwan JP
FAU - Mitchell, J B
AU  - Mitchell JB
FAU - Houmard, J
AU  - Houmard J
LA  - eng
PT  - Clinical Trial
PT  - Controlled Clinical Trial
PT  - Journal Article
PL  - United States
TA  - J Appl Physiol (1985)
JT  - Journal of applied physiology (Bethesda, Md. : 1985)
JID - 8502536
RN  - 0 (Blood Glucose)
RN  - 0 (Dietary Carbohydrates)
RN  - 0 (Lactates)
RN  - 9005-79-2 (Glycogen)
RN  - PDC6A3C0OX (Glycerol)
SB  - IM
MH  - Bicycling
MH  - Blood Glucose/metabolism
MH  - *Diet
MH  - *Dietary Carbohydrates
MH  - Fasting
MH  - Glycerol/blood
MH  - Glycogen/metabolism
MH  - Humans
MH  - Lactates/blood
MH  - Male
MH  - Muscles/metabolism
MH  - *Oxygen Consumption
MH  - *Physical Exertion
MH  - *Respiration
MH  - Work
EDAT- 1987/03/01 00:00
MHDA- 1987/03/01 00:01
CRDT- 1987/03/01 00:00
PHST- 1987/03/01 00:00 [pubmed]
PHST- 1987/03/01 00:01 [medline]
PHST- 1987/03/01 00:00 [entrez]
AID - 10.1152/jappl.1987.62.3.983 [doi]
PST - ppublish
SO  - J Appl Physiol (1985). 1987 Mar;62(3):983-8. doi: 10.1152/jappl.1987.62.3.983.