In all three types of muscle cells, most of the energy produced is used for the demands of muscle contraction, which is achieved by actin molecules sliding on myosin filaments. In addition, energy is used for pumping Ca 2+ from the sarcoplasma to the sarcoplasmic reticulum after the muscle contraction is over.
http://www.eolss.net/Sample-Chapters/C03/E6-54-08-01.pdf
Despite the small amount of it compared with other muscle types, cardiac muscle has a remarkable share of blood supply with a vivid energy metabolism. Smooth muscle is mostly found in the respiratory, urinary, and gastrointestinal tract, the reproductive system, and blood vessels.
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For an overview of the relative contributions of carbohydrate, fat and protein to energy metabolism during exercise at various intensities, see “How Different Nutrients Fuel Exercise at Different Intensities” above. It is important to recognize that no one energy system acts in isolation.
http://www.ideafit.com/fitness-library/revisiting-energy-systems
© Encyclopedia of Life Support Systems (EOLSS) work. ATP consists of an adenosine molecule linked to three phosphates. The bonds that link the molecule to the outermost phosphates are called high-energy phosphate bonds, since their hydrolysis (when ATP joins with water) releases 7.3 kcal of energy.
http://www.eolss.net/Sample-Chapters/C03/E6-54-08-01.pdf
Anabolism, on the other hand, is a energy-consuming process during which substances are created. The substrate supply exceeds the immediate need. The organism creates energy reserves, tissues are created and renewed. Anabolic processes are prevalent in situations of reduced physical activity.
http://www.fsps.muni.cz/~tvodicka/data/reader/book-4/04.html
© Encyclopedia of Life Support Systems (EOLSS) three mechanisms of ATP resynthesis are through anaerobic metabolism, which means without the use of oxygen. Anaerobic energy metabolism, also called anaerobic glycolysis, involves the incomplete breakdown of carbohydrates to lactic acid via anaerobic metabolic pathways.
http://www.eolss.net/Sample-Chapters/C03/E6-54-08-01.pdf
It is important to remember that the phosphagen energy system (including the ATP-CP and ATP-AK reactions) can provide only enough energy to sustain all-out exercise for about five to 10 seconds (Cotton 1997). Beyond this point, assistance from other sources of energy is required.
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This article will provide the answers to these and other common questions regarding exercise training. It will also provide examples of how energy is utilized during different types of exercise, such as resistance training and indoor cycling. Performing any kind of exercise requires energy.
http://www.ideafit.com/fitness-library/revisiting-energy-systems
Metabolism. Metabolism is a sum of events which are carried out in the human body to create energy and other substances necessary for its activities. In our organism there are catabolic and anabolic processes. Catabolism is a process during which organic matter is broken down and the energy is simultaneously released. It is characterized by missing reserves of glycogen and mobilisation of non-saccharide sources of energy – fats and proteins.
http://www.fsps.muni.cz/~tvodicka/data/reader/book-4/04.html
While most fitness professionals are familiar with the basics of energy metabolism, it can be difficult to explain to clients the intricacies of how the body breaks down and uses nutrients to fuel physical activity.
http://www.ideafit.com/fitness-library/revisiting-energy-systems
energy is derived mainly from the metabolism of
Energy is derived mainly from the metabolism of catabolism.