Slow moving Zombies are more realistic than fast moving zombies

First I will talk about thermodynamics and energy regarding both categories of zombies. Then I will move on to address biological limitations of infectious disease and a rotting human body. Finally I will point out that sedentary lifestyle is more closely aligned to human illness and more beneficial for a zombie's survival. I'll begin by addressing my contention regarding thermodynamics and relate it to this debate. The second law of thermodynamics states that in a closed system (such as the universe) energy is constant. This is more colloquially referred to as the law of conservation of energy. Now in the case of fast moving zombies, they are unrealistic with regard to this law in the fact that moving at such high speed would require some kind of energy. All known life in the animal kingdom consume some type of chemical energy to power locomotion and other bodily functions. A zombie however consumes no chemical energy and therefore does not have any way to power its locomotion. One might argue that zombies eat brains for chemical energy, but if this were true the zombie virus (or other infection) would never spread due to the lack of available hosts. In theory a human body can decompose itself as a source of chemical energy, but this is illogical and will explain why in my next contention. My second contention regards the biological side of a zombie, which is the reanimated corpse of a human. A zombie (since it is still a rotting corpse) would likely have failing ligaments and skeletal structure, which would not allow for such high speeds on foot. This is supported by the phenomena of sprained and damaged bones/ligaments (especially in those of failing health [i. e. the walking dead]). Weakened and failing joints, ligaments, bones, etc. would totally fail if a zombie attempted to move at the speeds depicted in movies such as World War Z. This also supports my previous argument that self atrophy for the sake of chemical energy is illogical, due to the fact that self atrophy would only further accelerate the failing of zombie locomotive ability. My third contention regards both of my previous arguments. I would contend that, in usual infectious disease situations, sedentary lifestyle is more closely aligned with what is typical of human nature. When one is sick with the flu they do not run around at full speed, because they are sick, typically lack chemical energy, and therefore cannot move as fast as they normally could. This is true for zombies as well seeing as most zombie experts point to infectious disease as the source of the rising of the undead. Take the fast moving zombies in World War Z for example. They are infected with a bite that rapidly turns them into ghoul capable of superhuman strength and superhuman speeds. Not one of them consumes any form of chemical energy to power these extreme processes. Clearly the infection is some kind of pathogen, but there is no energy source to power their impressive feats of speed and strength. This clearly violates the second law of thermodynamics. Furthermore after a few days or weeks of failing health (due to many factors such as the weather, lack of chemical energy to maintain the body, etc. ) they can still exhibit such amazing feats. The "Max Brooks" zombie (described in his book The Zombie Survival Guide) however moves slowly and therefore requires much less chemical energy. Sedentary lifestyle zombies would allow them to preserve the chemical energy that remains in their bodies and wait for food to come near. That is why the "Max Brooks Zombie" waits for some type of signal to attack such as noise. This virus could spread in a more realistic manner due to the zombies only occasionally needing to feed on a human due to the low energy efficient lifestyles that they lead. This would allow for a more successful outbreak and would therefore be beneficial to the zombie virus and therefore more realistic. To reiterate, my main contentions are as follows: Fast moving zombies violate the second law of thermodynamics, Fast moving zombies are unrealistic with respect to a rotting human body, and slow moving zombies are more realistic with respect to typical human disease and energy efficiency. I thank my partner for his time and eagerly await his response.