RT Journal Article SR Electronic A1 Hoyle, Brian T1 Geneva Stairs Study Findings JF MD Conference Express YR 2015 FD SAGE Publications VO 15 IS 28 suppl 1 SP 10 OP 11 DO 10.1177/1559897715613085 UL http://mdc.sagepub.com/content/15/28_suppl_1/10.abstract AB Participants who were healthy but physically inactive regularly used stairs in their workplace for 6 months instead of an elevator. The use of stairs was intensive during the first 3 months and less intensive the following 3 months. Blood analyses linked the physical activity intervention with a significant decrease in plasma PCSK9 (proprotein convertase subtilisin/kexin type 9) level at 3 months. PCSK9 could be seen as a novel marker of lifestyle interventions.