The building blocks of ATP synthesis are the by-products of its breakdown; adenosine diphosphate (ADP) and inorganic phosphate (Pi).
The energy for ATP resynthesis comes from three different series of chemical reactions that take place within the body.
Muscle glycogen content and plasma glucose, glycerol, nonesterified fatty acid, and triglyceride concentrations were determined.
RESULTS: Muscle glycogen content was significantly decreased immediately after exercise from 473 /- 45 to 329 /- 79 mmol/kg of dry weight in trial A, and from 472 /- 128 to 347 /- 59 mmol/kg in trial B.
The cellular respiration process that converts food energy into ATP (a form of energy) is largely dependent on oxygen availability.
During exercise, the supply and demand of oxygen available to muscle cells is affected by duration and intensity and by the individual's cardiorespiratory fitness level.The energy released is coupled to the energy requirement necessary for the resynthesis of ATP.The total muscular stores of both ATP and CP are small.(B) When creatine phosphate is broken down during muscular contraction, a large amount of energy is released.The energy released is coupled with the energy requirement to resynthesize ATP.The separate reactions are functionally linked together in such a way that the energy released by the one is always used by the other.The term metabolism refers to the various series of chemical reactions that take place within the body.OBJECTIVE: To determine glycogen resynthesis rate and changes in plasma metabolite concentrations in horses before and after repeated exercise.ANIMALS: 6 clinically normal Standardbred trotters. PROCEDURE: Horses trotted distances of 3,000, 3,000, and 2,000 m (trial A) and 3 days later, trotted 2,100, 2,100, and 1,600 m (trial B).Further decreases were measured 4 hours after exercise.Glycogen resynthesis was negligible 24 hours after exercise.