Table 2 Mean values with and without SMs during the 30 min continuous tests (n = 13; excluding the warm-up and recovery phase).

From: Effects of surgical face masks on cardiopulmonary parameters during steady state exercise

 

Co

SM

p-value

n2p

DIET

Pulmonary parameters

\({\text{VO}}_{2}\)(ml min−1 kg−1)

34.49 ± 5.79

33.05 ± 4.96

0.04*

0.31

44.79 ± 9.12

\({\dot{\text{V}}\text{CO}}_{2}\) (ml min−1)

2685 ± 278

2575 ± 310

0.04*

0.30

3958 ± 560

VE (l min−1)

82.42 ± 10.66

77.05 ± 9.26

 < 0.01*

0.61

141.83 ± 22.73

\({\text{V}}_{E}/{\dot{V}}{\text{O}}_{2}\) (l min−1/l min−1)

29.34 ± 4.41

28.50 ± 3.42

0.19

0.14

38.75 ± 7.12

\({\text{V}}_{E}/\dot{V}{\text{CO}}_{2}\) (l min−1/l min−1)

30.80 ± 3.81

30.01 ± 3.33

0.26

0.10

35.90 ± 3.87

\({\dot{\text{V}}}_{{\text{A}}}\) (l min−1)

60.88 ± 7.48

57.38 ± 6.55

0.01*

0.42

102,65 ± 17,71

Ti (s)

0.89 ± 0.14

1.01 ± 0.13

 < 0.01*

0.73

0.63 ± 0.11

Te (s)

0.98 ± 0.21

0.95 ± 0.17

0.14

0.17

0.66 ± 0.17

VT (l)

2.49 ± 0.35

2.45 ± 0.36

0.48

0.04

2.98 ± 0.59

RR (bpm)

34.03 ± 7.29

32.09 ± 5.40

0.02*

0.37

49.08 ± 11.23

Hemodynamic parameters

SBP (mmHg)

172.3 ± 15.8

177.2 ± 17.6

0.33

0.08

210.4 ± 26.9

DBP (mmHg)

74.6 ± 6.4

72.3 ± 9.1

0.20

0.13

77.5 ± 13.7

CO (l min−1)

25.93 ± 4.04

28.59 ± 3.94

0.06

0.27

32.06 ± 4.62

SV (ml)

168.4 ± 30.87

178.8 ± 25.67

0.22

0.12

176.02 ± 26.91

HR (bpm)

154.5 ± 11.4

160.1 ± 11.2

 < 0.01*

0.59

183.0 ± 11.4

CW (J)

29,049 ± 6165

31,866 ± 6770

0.14

0.17

37,040 ± 6964

avDO2 (%)

11.11 ± 1.84

9.59 ± 1.44

0.02*

0.38

11.74 ± 2.13

LAC∆ (mmol l−1)

4.27 ± 1.46

4.71 ± 1.42

0.26

0.11

9.01 ± 1.79

RER

0.95 ± 0.05

0.95 ± 0.05

0.97

–

1.08 ± 0.11

RPE (1–10)

6.6 ± 1.1

6.9 ± 1.1

0.16

0.16

10

SO2 (%)

95.22 ± 0.71

95.32 ± 0.83

0.73

0.01

–

Mean power output (Watt)

202.7 ± 26.0

202.7 ± 26.0

1.0

–

300.71 ± 40.52

Exercise duration (min)

30 ± 0

30 ± 0

1.0

 

–

  1. Values are given as the means and standard deviations. The values are presented as means and standard deviations.
  2. DIET double incremental exercise test; Co control; SM surgical mask; IET incremental exertion test; \({\text{VO}}_{2}\) oxygen uptake; \(\dot{V}CO_{2}\) carbon dioxide production; VE minute ventilation; \(V_{E}/{V}O_{2}\) refers to the number of liters of ventilation per liter of oxygen consumed; \(V_{E}/\dot{V}CO_{2}\) refers to the number of liters of ventilation per liter of carbon dioxide \({\dot{\text{V}}}_{A}\) alveolar ventilation; RR respiratory rate; VT tidal volume; Ti inspiratory time; Te expiratory time; SBP systolic blood pressure (5-min interval); DBP diastolic blood pressure (5-min interval); SV stroke volume; CO cardiac output; HR heart rate; avDO2 arteriovenous oxygen difference; RER respiratory exchange ratio, LAC blood lactate concentration (5-min interval); SO2% oxygen saturation RPE rating of perceived exertion (5-min interval); n2p.
  3. *Significant differences from control.
Back to article page