Figure 5.

% change from nightly mean values in BP_sys, BP_dia, and HR over SO in MA and YA during the control and 30-sec experimental condition as a function of time (2-min epochs) in phases 1 (30 min) and 5 (20 min), and 10% epochs in phases 2, 3, and 4. Legend: BP_sys, systolic blood pressure; BP_dia, diastolic blood pressure; HR, heart rate; MA, middle-aged; YA, young adults; LO, lights out; X̄, overall raw score phase average values across conditions and groups in mm Hg (BP_sys and BP_dia) and bpm (HR). Labeled values on the right of the graph in phase 5 are the % changes from phase 1 to phase 5 for each condition. N=10 per age group. Standard error bars indicate within-subject variability (variance in the change within subjects over time).