Table 3 Variables for submaximal intensity.

From: The effects of cloth face masks on cardiorespiratory responses and VO2 during maximal incremental running protocol among apparently healthy men

  

Stage

ANOVA

1

2

3

4

5

mask

stage

interaction

Vo2 (mL/min)

CFM

1125 ± 85

1494 ± 133

2259 ± 120

3123 ± 185

3481 ± 385

P = 0.26

P < 0.001

P = 0.14

CON

1130 ± 97

1487 ± 130

2271 ± 209

3231 ± 314

3706 ± 465

ηp2 = 0.12

ηp2 = 0.98

ηp2 = 0.20

Vco2 (mL/min)

CFM

810 ± 9

1189 ± 124

1972 ± 144

3024 ± 182

3703 ± 348

P = 0.04

P < 0.001

P = 0.09

CON

851 ± 54

1220 ± 97

2055 ± 156

3212 ± 269

3989 ± 503

ηp2 = 0.24

ηp2 = 0.98

ηp2 = 0.25

VT (L)

CFM

1.1 ± 0.2

1.4 ± 0.2

1.8 ± 0.1

2.0 ± 0.2

2.0 ± 0.3

P = 0.32

P < 0.001

P = 0.08

CON

1.1 ± 0.2

1.3 ± 0.2

1.8 ± 0.3

2.1 ± 0.3

2.2 ± 0.3

ηp2 = 0.09

ηp2 = 0.90

ηp2 = 0.26

fR (breath/min)

CFM

22.4 ± 3.7

23 ± 4.2

27.4 ± 3.1

36.9 ± 4.9

49.4 ± 6.6

P < 0.001

P < 0.001

P = 0.82

CON

23.9 ± 4.5

27.1 ± 4.1

29.1 ± 4.5

38.9 ± 5

52.5 ± 10

ηp2 = 0.67

ηp2 = 0.92

ηp2 = 0.00

VE (L/min)

CFM

23.0 ± 3.1*

31.8 ± 4.1

47.8 ± 5.5*

73.2 ± 7.4*

97.1 ± 13.7*

P = 0.00

P < 0.001

P = 0.01

CON

25.3 ± 1.6

33.3 ± 2.7

51.5 ± 5

81.8 ± 6.9

111.8 ± 15.2

ηp2 = 0.60

ηp2 = 0.98

ηp2 = 0.47

PETco2 (mmHg)

CFM

33 ± 2.7

31.2 ± 4.1

36.4 ± 4.5

39.5 ± 3.9

37 ± 3.1

P < 0.001

P < 0.001

P = 0.83

CON

30.9 ± 2.6

29.7 ± 2.6

35.4 ± 5.2

37.6 ± 3.5

34.9 ± 3.9

ηp2 = 0.74

ηp2 = 0.74

ηp2 = 0.00

PIpeak (cmH2O)

CFM

− 2.75 ± 1.56

− 3.31 ± 1.93

− 3.70 ± 2.21

− 4.08 ± 2.54

− 4.30 ± 2.39

P = 0.19

P < 0.001

P = 0.05

CON

− 1.28 ± 1.27

− 1.52 ± 1.52

− 1.78 ± 1.90

− 2.65 ± 1.31

− 4.63 ± 4.28

ηp2 = 0.20

ηp2 = 0.81

ηp2 = 0.39

PEpeak (cmH2O)

CFM

2.00 ± 1.98

2.37 ± 1.65

4.85 ± 2.43

9.37 ± 4.69

11.47 ± 5.51

P = 0.05

P = 0.03

P = 0.27

CON

2.55 ± 1.37

3.04 ± 1.21

4.77 ± 1.85

7.13 ± 2.82

8.28 ± 3.83

ηp2 = 0.41

ηp2 = 0.45

ηp2 = 0.15

SV (mL)

CFM

100.3 ± 19.8

104.7 ± 18.4

109.0 ± 20.3

116.9 ± 23.9

134.1 ± 33.6

P = 0.81

P < 0.001

P = 0.43

CON

96.2 ± 12.8

106.6 ± 15

113.8 ± 21.4

119 ± 22.6

120.8 ± 26.6

ηp2 = 0.00

ηp2 = 0.78

ηp2 = 0.06

HR (beat/min)

CFM

96.9 ± 12.0

114.6 ± 11.2

143.6 ± 12.0

173.6 ± 10.8

181.9 ± 22.5

P = 0.92

P < 0.001

P = 0.68

CON

97.6 ± 8.6

112.9 ± 8.8

144.5 ± 11.2

169.2 ± 13.8

185.8 ± 10.4

ηp2 = 0.00

ηp2 = 0.98

ηp2 = 0.01

CO (L/min)

CFM

9.7 ± 2.0

11.9 ± 2.1

15.6 ± 2.6

20.3 ± 4.3

24.5 ± 7.4

P = 0.72

P < 0.001

P = 0.45

CON

9.4 ± 1.1

12 ± 1.7

16.3 ± 2.5

19.9 ± 2.7

22.3 ± 4.3

ηp2 = 0.01

ηp2 = 0.94

ηp2 = 0.05

SpO2 (%)

CFM

98.9 ± 1.0

99.0 ± 1.0

98.5 ± 1.2

97.3 ± 1.3

94.2 ± 2.3

P = 0.37

P < 0.001

P = 0.07

CON

99.5 ± 0.8

98.9 ± 1

98.5 ± 1.4

96.3 ± 2.5

93.9 ± 2

ηp2 = 0.08

ηp2 = 0.81

ηp2 = 0.30

  1. CFM, cloth face masked trial; CON, unmasked control trial; Vo2, oxygen uptake; Vco2, carbon dioxide elimination; VT, tidal volume; fR, respiratory frequency; VE, minute ventilation; PETco2, end-tidal partial pressure of CO2; PIpeak, peak inspiratory mouth pressure; PEpeak, peak expiratory mouth pressure; SV, stroke volume; HR, heart rate; CO, cardiac output; ∫Pm, the integral absolute value of mouth pressure; SaO2, arterial oxy-hemoglobin saturation. Values are expressed as the mean ± SD. *, P < 0.05, significantly different to the CON condition.
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