The study involved: 1) preflight height change baseline data collection, 2) preflight back examination and back history, 3) daily in-flight reporting of back pain and other related information on a specially designed pain diagram, 4) daily in-flight measurement of height, and 5) postflight back examination and one month follow-up.
Measurements demonstrate a significant height increase within the first 24 hours of space flight in nearly all subjects. Seventy percent of subjects reported back symptoms of some degree. In addition, data demonstrated a shortening of the height following an extra-vehicular activity (EVA) and a re-growth to pre-EVA microgravity height within 24 hours post-EVA.
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