Skeletal muscle energy metabolism during exercise - Nature
2020年8月3日 · With the breakdown of ATP, PCr and glycogen in contracting skeletal muscle during intense exercise, marked increases in Mg 2+, ADP, P i, lactate and H + occur and have been associated with...
8.3 Phosphagen System (ATP-CP System)
The ATP–CP system (also known as the Phosphagen system or the ATP-PCr system) is the least complex of the three major energy producing systems and uses creatine phosphate (CP) as the fuel for ATP production. In general, the less complex the system, the fewer chemical reactions must take place so ATP can be produced faster.
ATP Energy Systems: Understanding What Happens in The Body
2024年7月13日 · Anaerobic - ATP-PCr (phosphagen system) The immediate source of energy for regenerating ATP, fueling the first 5-10 seconds of near-maximal activity. This is fueled by stores already in the muscles. Examples of this include a short sprint, a …
Energy system interaction and relative contribution during maximal exercise
The anaerobic energy system is divided into alactic and lactic components, referring to the processes involved in the splitting of the stored phosphagens, ATP and phosphocreatine (PCr), and the nonaerobic breakdown of carbohydrate to lactic acid through glycolysis.
Muscle [phosphocreatine] dynamics during exercise: implication …
2008年7月1日 · In contracting skeletal muscle, phosphocreatine (PCr) is one of the reactants linking mitochondrial respiration with the rate of muscle ATP usage through feedback activation. In contrast to what happens in heart in which [PCr] is stable, in skeletal muscle 31 P-MR spectroscopy shows marked changes in [PCr] in response to skeletal muscle activity.
Phosphocreatine recovery kinetics following low- and high …
Previous studies have suggested the recovery of phosphocreatine (PCr) after exercise is at least second-order in some conditions. Possible explanations for higher-order PCr recovery kinetics include heterogeneity of oxidative capacity among skeletal muscle fibers and ATP production via glycolysis contributing to PCr resynthesis.
Energy System Interaction and Relative Contribution During Maximal Exercise
2012年11月13日 · The first process involves the splitting of the high-energy phosphagen, phosphocreatine (PCr), which together with the stored ATP in the cell provides the immediate energy in the initial stages of intense or explosive exercise.
Overview of Exercise Metabolism - SpringerLink
2022年7月19日 · The supply of ATP is critical for ongoing skeletal muscle contractile activity during exercise. The metabolic pathways in muscle that ensure continual ATP supply are PCr degradation, glycolysis, and the oxidative metabolism of …
Enhancement of anaerobic glycolysis – a role of PGC-1α4 in
2022年4月28日 · PCr and anaerobic glycolysis can produce ATP much faster than oxidative phosphorylation, therefore anaerobic glycolysis is a preferred metabolic pathway of ATP generation for contracting...
Factors affecting the rate of phosphocreatine resynthesis following ...
Within the skeletal muscle cell at the onset of muscular contraction, phosphocreatine (PCr) represents the most immediate reserve for the rephosphorylation of adenosine triphosphate (ATP). As a result, its concentration can be reduced to less than 30% of resting levels during intense exercise. As a …