The ALACTIC system (aka the phosphagen or phosphocreatine system) is the energy system capable of producing the most energy within the shortest amount of time. A fight-ending flurry or combination uses this energy system. The alactic system is different to the aerobic and anaerobic system in that it produces energy by directly breaking down the ATP molecule, bypassing the conversion of fats, carbohydrates or protein into ATP. However, our body has limited stores of ATP, therefore the alactic system is the quickest to fatigue and can only produce large bursts of energy for up to 10 seconds. Fully restoring phosphocreatine and ATP stores takes around 5-8 minutes; this restoration time can be influenced by strength & conditioning training, as well as the level of development of the aerobic and anaerobic system.

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