Although the aerobic energy system is far more efficient than the anaerobic systems, it is much slower to take effect.
The energy needed for different activities varies considerably.
ATP is stored in small amounts in the muscle fibres and when one of its phosphate bonds is broken, , is formed together with energy and heat production (this is why people get hot when exercising).
ATP → ADP energy for contraction Muscle stores of ATP are limited.
This system allows the body to work in a steady state – the muscles work below maximal effort and keep this going for a long period of time.
Anaerobic Resynthesis Of Atp How To Write A Creative Writing Story
Carbon dioxide and water are produced as by-products.
Once exercise has started, the demand for energy increases and the stored supply of ATP is used up in a couple of seconds.
If continued muscular contraction is to take place, ATP has to be reformed from ADP once it has been used up. The body has three systems for doing this, which are collectively known as energy systems – there are two anaerobic and one aerobic system.
CP is also stored in the muscle fibres in small amounts, and although ATP can be reformed very quickly using this method, it cannot be kept up for very long, as the stores of CP are used up in 6-10 seconds.
ATP → ADP P energy (for movement) CP → C P energy (to resynthesize ATP) ADP P energy → ATP The CP system is used for activities that need bursts of explosive speed or power such as sprinting, jumping and throwing.