Skip to main content

Table 4 Exercise performed and physiological parameters during 2-hour walk.

From: Beneficial cardiovascular effects of reducing exposure to particulate air pollution with a simple facemask

   Without Mask With Mask
Activity Energy expenditure, kcals 340
(314 – 367)
364
(304 – 426)
  Energy expenditure, METS 3.33
(3.09 – 3.57)
3.61
(3.12 – 4.10)
Ambulatory blood pressure Systolic blood pressure, mmHg 121
(115 – 127)
114*
(108 – 120)
  Diastolic blood pressure, mmHg 81
(75 – 87)
79
(74 – 83)
  Mean arterial pressure, mmHg 94
(89 – 99)
90
(86 – 94)
  Heart rate, bpm 88
(82 – 94)
91
(85 – 97)
Heart rate variability Data validity, % 99.1 97.8
  Average NN interval, ms 594
(562 – 627)
613
(571 – 655)
  pNN50, % 3.3
(0.8 – 5.7)
2.1
(-0.1 – 4.4)
  RMSSD, ms 17.2
(13.4 – 21.0)
20.0
(15.5 – 24.6)
  SDNN, ms 45.8
(36.8 – 54.8)
54.8
(42.5 – 67.0)
  Triangular Index 10.7
(9.1 – 12.4)
11.4
(9.4 – 13.3)
  LF-power, ms2 313
(170 – 455)
414
(233 – 595)
  HF-power, ms2 76.5
(33.6 – 120.0)
116.8
(52.6 – 181.0)
  LFn, ms 68.2
(60.9 – 75.5)
67.9
(61.9 – 73.9)
  HFn, ms 16.1
(11.9 – 20.3)
16.0
(12.5 – 19.4)
  HF/LF ratio 0.259
(0.173 – 0.344)
0.247
(0.180 – 0.314)
  1. All data expressed as mean (95% confidence interval).
  2. *P < 0.01 compared to control (without mask) day, paired Student's t-test.
  3. P > 0.05 for all other parameters compared to control (without mask) day.