Even with so much exercise still the muscles will atrophy. The blood will clot and the brain shift in its fluid. The spine lengthens, the T cells struggle to reproduce, kidney stones form. While they’re here food tastes of little. Their sinuses are murder. Proprioception falters – it’s hard to know where their body parts are without looking. They become misshapen bags of fluid, too much in the upper body and not enough lower down. Fluid gathers behind the eyeball and squashes the optic nerve. Sleep mutinies. Their gut microbiomes grow new bacteria. Their cancer risk increases.