Anaerobic Conditioning - Over 200 Beats Per Minute up to the horses MAXIMUM HEART RATE
There are two anaerobic energy systems: the ATP-CP system and the Lactic Acid system. The simpler and most rapid of these two is the ATP-CP system.
The ATC-CP System
The chemical compound Creatine Phosphate (CP) releases energy when it is broken down to creatine and phosphate. The released energy is used to rebuild more AdenosineTri-Phosphate (ATP). Oxygen is not required and no lactic acid is produced.
This system is called on to produce the energy for highly intense but short duration (1-6 seconds) activity. While training probably cannot increase the resting levels of CP, it can probably increase the rate at which CP is broken down to provide energy to rebuild ATP.
The Lactic Acid System
More complicated than the ATC-CP system, this system predominantly operates during the early period of high intensity – up to about 90 seconds – and produces a substance known as lactic acid with symptoms of pain and fatigue. It only uses carbohydrate as a fuel, therefore requiring glycogen stores in the muscles to be high.
Anaerobic-type training can increase the power and capacity of this system by increasing the number of enzymes involved in the breakdown of glycogen to lactic acid and improving the muscle’s tolerance to lactic acid accumulation.
Together the ATP-CP and lactic acid system can produce a large amount of energy very quickly. The downside, however, are they can only do it for a relatively short period of time.