Table 2. Subjects baseline characteristics.

Parameter	Mean ± SD	Range
Age (years)	78±8	56–88
Body mass index (kg/m2)	26±4	17–33
Brachial systolic blood pressure (mmHg)	126±17	101–155
Brachial diastolic blood pressure (mmHg)	71±9	55–90
Brachial mean arterial pressure (mmHg)	87±10	71–106
Paced heart rate (bpm)	61±3	50–78
Total peripheral resistance (dyn.s.cm-5)	1293±308	644–1743
Stroke volume (ml)	85.7±25.4	38.6–136.2
Cardiac output (L/min)	5.3±1.4	3.4–7.6
PPGF (%)	50±7	39–63

PPGF, PPG fitness index.