When MMA spectators and fans see the effectiveness of mixed martial arts in the ring they instantly assume it's the ideal form of self defense for the street. To the uninitiated, this may seem like an obvious and logical supposition, but in reality it's wrong and can get you into a lot of trouble when faced with a street fight or any other reality based self defense situation. The truth is mixed martial arts are created and designed exclusively for sport competition and not self defense scenarios. I actually wrote a tongue-in-cheek article illustrating the drastic differences between mixed martial arts competition and reality based self defense. (see, sammy franco's open challenge.)
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.