-transparent.png){kind=logo}
Effects of carbohydrate ingestion and exercise on portal vein blood flow were studied. Flow was measured by pulsed-electronic Doppler. Eight male subjects performed four tests after a standardised breakfast and 5 h fast. Beverages were CHO (10 % glucose, 30 mmol . l (-1) NaCl) and W (water, 30 mmol . l (-1) NaCl). Exercise experiments comprised a resting measurement, 10 min warm-up and 60 min 70 % VO(2)max cycling. Every 10 min subjects stopped cycling briefly (approximately 30 s) for measurements. Beverage was consumed after warm-up (500 ml) and at 20 and 40 min (250 ml). Similar tests were done at rest. Blood samples were taken concurrently with flow measurements for hormonal concentrations. Exercise decreased blood flow (repeated measures ANOVA, p < 0.0001) and carbohydrate ingestion increased flow (p = 0.015). At rest, flow was greater with CHO than with W at 20 (177 +/- 31; 101 +/- 25 %, resp.) (mean +/- SE), 30 (209 +/- 37; 120 +/- 20 %), 40 (188 +/- 32; 108 +/- 12 %), and 60 min (195 +/- 19; 112 +/- 12 %) (1-way ANOVA, Fisher's PLSD, p < 0.05). Flow was similar during exercise with CHO and W, with a tendency for CHO to maintain flow better, at 10 (124 +/- 27; 77 +/- 21 %), 20 (81 +/- 10; 60 +/- 13 %), 30 (106 +/- 26; 56 +/- 10 %), 40 (109 +/- 28; 54 +/- 8 %), 50 (85 +/- 17; 54 +/- 13 %), and 60 min (61 +/- 15; 47 +/- 7 %). A positive correlation between glucagon and flow and an inverse correlation between noradrenaline and flow were observed. Exercise reduces, and carbohydrate increases, portal vein flow. Changes in plasma concentrations suggest that noradrenaline and glucagon, respectively, may play a role in modulating flow.
N J Rehrer, and
E Goes, and
C DuGardeyn, and
H Reynaert, and
K DeMeirleir
July 2000,
American journal of obstetrics and gynecology,
N J Rehrer, and
E Goes, and
C DuGardeyn, and
H Reynaert, and
K DeMeirleir
January 1991,
European surgical research. Europaische chirurgische Forschung. Recherches chirurgicales europeennes,
N J Rehrer, and
E Goes, and
C DuGardeyn, and
H Reynaert, and
K DeMeirleir
August 1994,
Aging (Milan, Italy),
N J Rehrer, and
E Goes, and
C DuGardeyn, and
H Reynaert, and
K DeMeirleir
February 1993,
Journal of applied physiology (Bethesda, Md. : 1985),
N J Rehrer, and
E Goes, and
C DuGardeyn, and
H Reynaert, and
K DeMeirleir
September 1986,
The Journal of surgical research,
N J Rehrer, and
E Goes, and
C DuGardeyn, and
H Reynaert, and
K DeMeirleir
March 2020,
Medicine and science in sports and exercise,
N J Rehrer, and
E Goes, and
C DuGardeyn, and
H Reynaert, and
K DeMeirleir
June 1980,
The Journal of clinical investigation,
N J Rehrer, and
E Goes, and
C DuGardeyn, and
H Reynaert, and
K DeMeirleir
January 1995,
Digestive diseases and sciences,
N J Rehrer, and
E Goes, and
C DuGardeyn, and
H Reynaert, and
K DeMeirleir
May 1961,
American journal of veterinary research,
N J Rehrer, and
E Goes, and
C DuGardeyn, and
H Reynaert, and
K DeMeirleir
January 1967,
Langenbecks Archiv fur Chirurgie,
