Sometimes I sleep in a hammock and it helps a lot. I have a Grand Trunk and an ENO, both doubles, that fit me and my girlfriend comfortably. I prefer the Grand Trunk, but I use the ENO mounting hardware with it.
Normal adult cells use a small energy plant located inside them to produce most of their energy needs from oxygen, this is an aerobic process. In contrast, cancer cells rely mainly on the first part of the energy production process dependant on glucose (sugar), this is an anaerobic process.
Anaerobic respiration is the metabolic process in which oxygen is absent, and only the stage of glycolysis is completed. This process occurs mostly in microorganisms, but it can also be a temporary response to anoxic, or oxygen-less, conditions in the cells of multi-cellular organisms - even us!