Effect of a short-term dietary creatine supplementation on high-energy phosphates in the rat myocardium.

The aim of this study was to find out whether creatine (Cr) feeding affects total creatine (TCr), phosphocreatine (PCr), adenine nucleotide contents and beta-hydroxy-acyl-CoA-dehydrogenase (HAD) activity in myocardium as compared to red skeletal muscle. Ten adult Wistar rats received Cr (2.5% of diet weight) for 7 days.

Glucose infusion into exercising dogs after confinement: rectal and active muscle temperatures.

Background: Intravenous glucose infusion into ambulatory dogs results in attenuation of exercise-induced increase of both rectal and thigh muscle temperatures.

Hypothesis: That glucose (Glu) infusion attenuates excessive increase in body temperature from restricted activity during confinement deconditioning.

Methods: Rectal (Tre) and quadriceps femoris muscle (Tmu) temperatures, metabolic rate, and blood samples were taken before and after 90 min of moderate treadmill exercise (mean = 3.

Hypohydration increases the plasma catecholamine response to moderate exercise in the dog (Canis).

1. The effects of hypohydration produced by 48 hr water deprivation were examined in dogs during moderate treadmill exercise at an ambient temperature (Ta) of 21 degrees C. 2.

Effect of beta-adrenergic blockade on lipid mobilization induced by fasting in dogs.

To evaluate the contribution of catecholamines to the fasting-induced lipid mobilization prolonged or acute blockade of beta-adrenergic receptors with propranolol was applied in dogs during 72 hrs of food withdrawal. Propranolol given orally in a dose of 15 mg twice daily throughout the whole period of fasting failed to modify the increases in the plasma FFA and glycerol concentrations. The acute beta-adrenergic blockade due to i.