Exposure to traffic-related air pollution during physical activity and acute changes in blood pressure, autonomic and micro-vascular function in women: a cross-over study

Table 2 Baseline physiological measurements

Physiological measure	n	Mean/% (SD)	Range
Heart Rate	142	78.5 (12)	53-105
Systolic Blood Pressure (mm Hg)	137	98. 4 (9.45)	80-129
Diastolic Blood Pressure (mm Hg)	137	62.1 (7.3)	44-80
Reactive Hyperemia Index	136	1.61 (0.31)	0.93-2.73
SDNN (ms)	142	112 (39)	43-229
RMSSD (ms)	142	28.3 (12)	9-78
pNN50 (%)	142	8.67 (8.5)	0-42
LF (ms²)	142	1316 (1189)	25-6764
HF (ms²)	142	296 (334)	11-1924
LF:HF	142	6.38 (5.0)	1.1-43

SD, standard deviation; SDNN, standard deviation of normal to normal intervals; RMSSD, root mean square of successive differences in adjacent NN intervals; pNN50, proportion of adjacent NN intervals differing by more than 50 ms; LF, low-frequency power; HF, high-frequency power.

ISSN: 1743-8977