PMID- 2020269
OWN - NLM
STAT- MEDLINE
DCOM- 19910530
LR  - 20061115
IS  - 0195-9131 (Print)
IS  - 0195-9131 (Linking)
VI  - 23
IP  - 3
DP  - 1991 Mar
TI  - The influence of volume on gastric emptying and fluid balance during prolonged 
      exercise.
PG  - 314-9
AB  - The purpose of this study was to determine the effect of ingesting approximately 
      800, 1200, or 1600 ml.h-1 of a carbohydrate (CHO) solution on gastric emptying 
      (GE), ratings of stomach fullness (RF), plasma volume changes (PVC), 
      electrolytes, fluid loss, and blood glucose (BG) during 2 h of cycling at 70% of 
      VO2max. Eight male cyclists completed three rides during which they ingested 
      either 11.5 (LV), 17.1 (MV), or 23 ml.kg-1.h-1 (HV) of a 7.5% CHO solution every 
      15 min. Blood samples were taken at 0, 60, 90, and 120 min and 15 min after the 
      ride for the determination of PVC, sodium (Na+), potassium (K+), and BG. Body 
      weight was recorded before and after the rides to determine dehydration. Rates of 
      GE were determined via stomach aspiration after the rides. A significantly (P 
      less than 0.05) greater volume of fluid was emptied in the HV trial (2268 +/- 
      70.8 ml) compared with the MV and LV trials (1860 +/- 72 and 1452 +/- 24 ml, 
      respectively). The rate of GE in the MV trial was also significantly greater than 
      in the LV trial. RF were significantly higher in the MV and HV trials compared 
      with the LV trial throughout the rides. There were no significant differences in 
      PVC (0.01 +/- 2.2%, 1.05 +/- 1.62%, and 0.97 +/- 1.28% for LV, MV, and HV, 
      respectively), Na+, K+, or BG between the three trials. There was a significantly 
      greater decrease in body weight in the LV (-0.77 +/- 0.14 kg) compared with the 
      MV and HV trials (-0.38 +/- 0.13 and -0.14 +/- 0.14 kg).(ABSTRACT TRUNCATED AT 
      250 WORDS)
FAU - Mitchell, J B
AU  - Mitchell JB
AD  - Department of Physical Education, Texas Christian University, Fort Worth 76129.
FAU - Voss, K W
AU  - Voss KW
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PT  - Review
PL  - United States
TA  - Med Sci Sports Exerc
JT  - Medicine and science in sports and exercise
JID - 8005433
RN  - 0 (Dietary Carbohydrates)
RN  - 0 (Solutions)
SB  - IM
MH  - *Beverages
MH  - Dietary Carbohydrates/*administration & dosage
MH  - Exercise/*physiology
MH  - *Gastric Emptying
MH  - Humans
MH  - Osmolar Concentration
MH  - Solutions
RF  - 36
EDAT- 1991/03/01 00:00
MHDA- 1991/03/01 00:01
CRDT- 1991/03/01 00:00
PHST- 1991/03/01 00:00 [pubmed]
PHST- 1991/03/01 00:01 [medline]
PHST- 1991/03/01 00:00 [entrez]
PST - ppublish
SO  - Med Sci Sports Exerc. 1991 Mar;23(3):314-9.