regardless of the situation with the helmets, the gastrointestinal distress and "jeep driver's disease" cysts could actually be a real problem.
the pilonidal cysts especially caused something like 40,000 casualties (rendered unfit for duty, not killed) in ww2, and they were directly caused by sitting in seats for long periods while traveling over rough terrain.
(the cysts form when the skin in the crack of the buttocks is over-stretched laterally and the pores, being weak points, get torn asunder to form channels that run deep into the interior which are subsequently infected.)
(i.e. the pores in the skin of your rear end, tear down the middle like the pants of a fat man bending over.)
Poll
