Article ; Online: The Importance of Fatty Acids as Nutrients during Post-Exercise Recovery.
2020 Volume 12, Issue 2
Abstract: It is well recognized that whole-body fatty acid (FA) oxidation remains increased for several hours following aerobic endurance exercise, even despite carbohydrate intake. However, the mechanisms involved herein have hitherto not been subject to a ... ...
Abstract | It is well recognized that whole-body fatty acid (FA) oxidation remains increased for several hours following aerobic endurance exercise, even despite carbohydrate intake. However, the mechanisms involved herein have hitherto not been subject to a thorough evaluation. In immediate and early recovery (0-4 h), plasma FA availability is high, which seems mainly to be a result of hormonal factors and increased adipose tissue blood flow. The increased circulating availability of adipose-derived FA, coupled with FA from lipoprotein lipase (LPL)-derived very-low density lipoprotein (VLDL)-triacylglycerol (TG) hydrolysis in skeletal muscle capillaries and hydrolysis of TG within the muscle together act as substrates for the increased mitochondrial FA oxidation post-exercise. Within the skeletal muscle cells, increased reliance on FA oxidation likely results from enhanced FA uptake into the mitochondria through the carnitine palmitoyltransferase (CPT) 1 reaction, and concomitant AMP-activated protein kinase (AMPK)-mediated pyruvate dehydrogenase (PDH) inhibition of glucose oxidation. Together this allows glucose taken up by the skeletal muscles to be directed towards the resynthesis of glycogen. Besides being oxidized, FAs also seem to be crucial signaling molecules for peroxisome proliferator-activated receptor (PPAR) signaling post-exercise, and thus for induction of the exercise-induced FA oxidative gene adaptation program in skeletal muscle following exercise. Collectively, a high FA turnover in recovery seems essential to regain whole-body substrate homeostasis. |
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MeSH term(s) | AMP-Activated Protein Kinases/metabolism ; Adipose Tissue/metabolism ; Biological Availability ; Carnitine O-Palmitoyltransferase/metabolism ; Exercise/physiology ; Fatty Acids/pharmacokinetics ; Glucose/metabolism ; Glycogen/metabolism ; Homeostasis ; Humans ; Hydrolysis/drug effects ; Lipoprotein Lipase/metabolism ; Lipoproteins, VLDL/metabolism ; Muscle, Skeletal/metabolism ; Nutrients/pharmacokinetics ; Oxidation-Reduction/drug effects ; Peroxisome Proliferator-Activated Receptors/metabolism ; Signal Transduction ; Triglycerides/metabolism |
Chemical Substances | Fatty Acids ; Lipoproteins, VLDL ; Peroxisome Proliferator-Activated Receptors ; Triglycerides ; Glycogen (9005-79-2) ; Carnitine O-Palmitoyltransferase (EC 2.3.1.21) ; AMP-Activated Protein Kinases (EC 2.7.11.31) ; Lipoprotein Lipase (EC 3.1.1.34) ; Glucose (IY9XDZ35W2) |
Language | English |
Publishing date | 2020-01-21 |
Publishing country | Switzerland |
Document type | Journal Article ; Review |
ZDB-ID | 2518386-2 |
ISSN | 2072-6643 ; 2072-6643 |
ISSN (online) | 2072-6643 |
ISSN | 2072-6643 |
DOI | 10.3390/nu12020280 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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