The effects of prolonged physical exercise on renal function, electrolyte balance and muscle cell breakdown

2002 ◽  
Vol 57 (06) ◽  
pp. 425-431 ◽  
Author(s):  
J. Gerth ◽  
U. Ott ◽  
R. Fünfstück ◽  
R. Bartsch ◽  
E. Keil ◽  
...  
Keyword(s):  
Renal Function ◽  
Physical Exercise ◽  
Muscle Cell ◽  
Electrolyte Balance ◽  
Prolonged Physical Exercise ◽  
Cell Breakdown

Effect of low blood glucose on plasma CRF, ACTH, and cortisol during prolonged physical exercise

1991 ◽  
Vol 71 (5) ◽  
pp. 1807-1812 ◽  
Author(s):  
I. Tabata ◽  
F. Ogita ◽  
M. Miyachi ◽  
H. Shibayama
Keyword(s):  
Blood Glucose ◽  
Physical Exercise ◽  
Glucose Concentration ◽  
Blood Glucose Concentration ◽  
Plasma Concentrations ◽  
Bicycle Exercise ◽  
Low Intensity ◽  
Prolonged Physical Exercise ◽  
Blood Glucose Concentrations ◽  
Exercise In Humans

The effects of low blood glucose concentration during low-intensity prolonged physical exercise on the hypothalamus-pituitary-adrenocortical axis were investigated in healthy young men. In experiment 1, six subjects who had fasted for 14 h performed bicycle exercise at 50% of their maximal O2 uptake until exhaustion. At the end of the exercise, adrenocorticotropic hormone (ACTH) and cortisol increased significantly. However, this hormonal response was totally abolished when the same subjects exercised at the same intensity while blood glucose concentrations were maintained at the preexercise level. In experiment 2, in addition to ACTH and cortisol, the possible changes in plasma concentration of corticotropin-releasing factor (CRF) were investigated during exercise of the same intensity performed by six subjects. As suggested by a previous study (Tabata et al. Clin. Physiol. Oxf. 4: 299–307, 1984), when the blood glucose concentrations decreased to less than 3.3 mM, plasma concentrations of CRF, ACTH, and cortisol showed a significant increase. At exhaustion, further increases were observed in plasma CRF, ACTH, and cortisol concentrations. These results demonstrate that decreases in blood glucose concentration trigger the pituitary-adrenocortical axis to enhance secretion of ACTH and cortisol during low-intensity prolonged exercise in humans. The data also might suggest that this activation is due to increased concentration of CRF, which was shown to increase when blood glucose concentration decreased to a critical level of 3.3 mM.

Evaluation of renal function and fluid homeostasis during recovery from exercise-induced hyponatremia

1991 ◽  
Vol 70 (1) ◽  
pp. 342-348 ◽  
Author(s):  
R. A. Irving ◽  
T. D. Noakes ◽  
R. Buck ◽  
R. van Zyl Smit ◽  
E. Raine ◽  
...  
Keyword(s):  
Renal Function ◽  
Prolonged Exercise ◽  
Fluid Intake ◽  
Sodium Concentration ◽  
Plasma Sodium ◽  
Electrolyte Balance ◽  
Plasma Sodium Concentration ◽  
Fluid Deficit ◽  
H 41 ◽  
Exercise Induced

Renal function including fluid and electrolyte balance was studied during recovery in eight subjects who developed symptomatic hyponatremia (HN; plasma sodium concentration less than 130 mM) during an 88-km ultramarathon footrace and compared with results for normonatremic runners [NN; n = 18, mean postrace plasma sodium concentration, 138.2 +/- 1.2 (SE) mM]. Estimated fluid intake during the race for HN was 12.5 +/- 1.6 (SE) liters over 9 h 41 min (+/- 28 min). HN excreted a net fluid excess of 2.95 +/- 0.56 (range 1.2–5.9) liters compared with a fluid deficit of 2.7 +/- 0.3% body weight in NN. The sodium deficit was 153 +/- 35 mmol in HN and 187 +/- 37 mmol in NN. Despite the fluid overload, plasma volume was decreased by 24.1 +/- 5.0% in HN compared with 8.2 +/- 2.6% in NN. Serum renin activity (5.1 +/- 2.0 ng.ml-1.h-1), aldosterone concentrations (410 +/- 34 ng/l), creatinine clearances (174.8 +/- 28.2 ml/min), and urine output (6.4 +/- 1.0 ml/min) were markedly elevated in HN during recovery. Thus the hyponatremia of exercise results from fluid retention in subjects who ingest abnormally large fluid volumes during prolonged exercise.

Biochemical Variables in Plasma and Urine before and after Prolonged Physical Exercise

Enzyme ◽  
1985 ◽  
Vol 33 (3) ◽  
pp. 134-142 ◽  
Author(s):  
P. (a) Hespel ◽  
E. (b) Vanden Eynde ◽  
A. (a) Amery ◽  
P. (a) Lijnen
Keyword(s):  
Physical Exercise ◽  
Biochemical Variables ◽  
Prolonged Physical Exercise ◽  
Before And After

Metabolic Effects of Atenolol and Doxazosin in Healthy Volunteers During Prolonged Physical Exercise

1995 ◽  
Vol 25 (1) ◽  
pp. 142-146 ◽  
Author(s):  
Alessandro Cosenzi ◽  
Ariela Sacerdote ◽  
Elena Bocin ◽  
Rossella Molino ◽  
Mariangela Mangiarotti ◽  
...  
Keyword(s):  
Physical Exercise ◽  
Healthy Volunteers ◽  
Metabolic Effects ◽  
Prolonged Physical Exercise

Effects of Aging on the Renal Function after Physical Exercise

2006 ◽  
Vol 38 (Supplement) ◽  
pp. S89 ◽  
Author(s):  
Masato Suzuki ◽  
Akio Imanishi ◽  
Junichi Otsuka ◽  
Daisuke Shindou ◽  
Masaki Kimura ◽  
...  
Keyword(s):  
Renal Function ◽  
Physical Exercise ◽  
Effects Of Aging

Effect of HCG Injection on Glucose and Lactate Turn-Over during Prolonged Physical Exercise and Fasting in Rats

1986 ◽  
Vol 18 (04) ◽  
pp. 278-279
Author(s):  
P. Satabin ◽  
D. Merino ◽  
B. Serrurier ◽  
C. Guezennec
Keyword(s):  
Physical Exercise ◽  
Prolonged Physical Exercise ◽  
Turn Over

Metabolic effects of testosterone during prolonged physical exercise and fasting

1984 ◽  
Vol 52 (3) ◽  
pp. 300-304 ◽  
Author(s):  
C. Y. Guezennec ◽  
P. Ferre ◽  
B. Serrurier ◽  
D. Merino ◽  
M. Aymonod ◽  
...  
Keyword(s):  
Physical Exercise ◽  
Metabolic Effects ◽  
Prolonged Physical Exercise
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