Fig. 1: Bone biochemistry.
From: Bone metabolism during strict head-down tilt bed rest and exposure to elevated levels of ambient CO2
Urinary calcium, n-telopeptide, parathyroid hormone (PTH), and bone-specific alkaline phosphatase (BSAP) before (Pre), and during bed rest (BR15, BR30, or BR60) comparing several bed rest studies of similar duration. Data are means ± SD. The control data from this study are the solid black line and filled circle (AGBRESA Control) and the subjects exposed to 0.5% CO2 during bed rest are the solid line with filled squares. Comparable bed rest studies are in gray with dashed lines9,13,14,16,18,21,33,34,35,47,65,66.
