Each patient's comfort level was assessed at two time points: at baseline-prior to random assignment to bed rest or walking-and after 1 hour of bed rest or walking. In the current study, the lowest endpoint on the VAS was anchored by the words "Extremely Comfortable" and the highest endpoint was anchored by the words "Extremely Uncomfortable." The participant was directed to make a horizontal mark through the point on the vertical line that indicates how comfortable or uncomfortable she was feeling at that moment. Prior to completing the VAS for the study, each participant practiced marking a VAS once under supervision to verity that they understood how to mark the VAS properly. Scoring of the VAS was conducted at a later time by measuring in millimeters from the lowest end of the vertical line to the intersection of the participant's mark on the vertical line. Scores on the VAS can range from 0 to 100 mm, with higher scores indicating higher levels of discomfort.