منابع مشابه
Effect of aging on glucose and lipid metabolism during endurance exercise.
Endurance exercise increases the use of endogenous fuels to provide energy for working muscles. Elderly subjects oxidize more glucose and less fat during moderate intensity exercise. This shift in substrate use is presumably caused by age-related changes in skeletal muscle, including decreased skeletal muscle respiratory capacity, because adipose tissue lipolysis and plasma fatty acid availabil...
متن کاملLiver glycogen metabolism during and after prolonged endurance-type exercise.
Carbohydrate and fat are the main substrates utilized during prolonged endurance-type exercise. The relative contribution of each is determined primarily by the intensity and duration of exercise, along with individual training and nutritional status. During moderate- to high-intensity exercise, carbohydrate represents the main substrate source. Because endogenous carbohydrate stores (primarily...
متن کاملSubstrate metabolism during different exercise intensities in endurance-trained women.
We have studied eight endurance-trained women at rest and during exercise at 25, 65, and 85% of maximal oxygen uptake. The rate of appearance (R(a)) of free fatty acids (FFA) was determined by infusion of [(2)H(2)]palmitate, and fat oxidation rates were determined by indirect calorimetry. Glucose kinetics were assessed with [6,6-(2)H(2)]glucose. Glucose R(a) increased in relation to exercise in...
متن کاملThe Effect of Chronic Intake of L-carnitine L-tartrate on Lipid Metabolism during Aerobic Exercise
Background & Aims: Despite 20 years of research, there is no compelling evidence about the effect of carnitine supplementation on improving physical performance in healthy subjects. The aim of this study was to determine the effect of long term consumption of acute L-carnitine L-tartarate (LCLT) on fat metabolism and aerobic capacity. Methods: A total of 28 healthy nonathlete male students rece...
متن کاملLipid metabolism and exercise
The regulation of lipolysis in adipocytes involves coordinated actions of many lipid droplet (LD)-associated proteins such as perilipin, hormone sensitive lipase (HSL), adipose triglyceride lipase (ATGL), and its activator protein, CGI-58. Recently, the author and my colleagues described the cellular origin and physiological significance of micro LDs (mLDs) that emerge in the cytoplasm during a...
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ژورنال
عنوان ژورنال: The American Journal of Clinical Nutrition
سال: 2000
ISSN: 0002-9165,1938-3207
DOI: 10.1093/ajcn/72.2.558s