PMID- 9189783
OWN - NLM
STAT- MEDLINE
DCOM- 19970724
LR  - 20191102
IS  - 1050-1606 (Print)
IS  - 1050-1606 (Linking)
VI  - 7
IP  - 2
DP  - 1997 Jun
TI  - Glycemic and insulinemic responses to multiple preexercise carbohydrate feedings.
PG  - 128-37
AB  - This investigation was undertaken to determine whether consuming several small 
      feedings of preexercise carbohydrate (CHO), rather than a single bolus, would 
      affect blood glucose and insulin responses during rest and exercise. Eight 
      trained cyclists ingested 22.5, 45, or 75 total g maltodextrin and dextrose 
      dissolved in 473 ml of water or an equal volume of placebo (PL). Drinks were 
      divided into four portions and consumed at 15-min intervals in the hour before a 
      120-min ride at 66% VO2max. Serum glucose values were elevated by the CHO 
      feedings at rest and fell significantly below baseline and PL at 15 min of 
      exercise. However, glucose concentrations were similar in each of the CHO trials. 
      Insulin concentrations also increased rapidly during rest, then fell sharply at 
      the onset of exercise. The findings demonstrate that CHO consumed within an hour 
      before exercise, even when taken in several small feedings, can produce transient 
      hypoglycemia near the onset of exercise. Additionally, the magnitude of the 
      response appears to be unrelated to either the amount of CHO ingested or the 
      insulin response.
FAU - Short, K R
AU  - Short KR
AD  - Human Performance Lab, Ball State University, Muncie, IN 47306, USA.
FAU - Sheffield-Moore, M
AU  - Sheffield-Moore M
FAU - Costill, D L
AU  - Costill DL
LA  - eng
PT  - Clinical Trial
PT  - Journal Article
PT  - Randomized Controlled Trial
PL  - United States
TA  - Int J Sport Nutr
JT  - International journal of sport nutrition
JID - 9307702
RN  - 0 (Blood Glucose)
RN  - 0 (Dietary Carbohydrates)
RN  - 0 (Insulin)
SB  - IM
MH  - Adult
MH  - Beverages
MH  - Blood Glucose/*metabolism
MH  - Dietary Carbohydrates/*administration & dosage
MH  - Dose-Response Relationship, Drug
MH  - Double-Blind Method
MH  - Exercise/*physiology
MH  - Humans
MH  - Insulin/*blood
MH  - Male
MH  - Oxidation-Reduction
MH  - Time Factors
EDAT- 1997/06/01 00:00
MHDA- 1997/06/01 00:01
CRDT- 1997/06/01 00:00
PHST- 1997/06/01 00:00 [pubmed]
PHST- 1997/06/01 00:01 [medline]
PHST- 1997/06/01 00:00 [entrez]
AID - 10.1123/ijsn.7.2.128 [doi]
PST - ppublish
SO  - Int J Sport Nutr. 1997 Jun;7(2):128-37. doi: 10.1123/ijsn.7.2.128.