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Table 1 Characteristics of the healthy men

From: Ageing and endurance training effects on quantity and quality of pulmonary vascular bed in healthy men

Characteristics n median [interquartile]

Healthy men n = 63

Inactive men n = 31

Trained men n = 32

P value #

Age, years

38 [27; 47]

37 [29; 48]

39 [25; 46]

0.574

Height, cm

179 [173; 185]

177 [171; 183]

180 [178; 186]

0.038

Haemoglobin, g/dL

14.4 [13.7; 15.0]

14.4 [13.7; 15.4]

14.3 [13.7; 14.5]

0.397

Physical activity assessment

    

Sport practice, hours/week

4.0 [0.0; 8.0]

0.0 [0.0; 0.0]

7.0 [5.0; 10.0]

<0.001

Vigorous-intensity domain, MET-min/week

1200 [0; 3840]

0 [0; 80]

3840 [2880; 6300]

<0.001

Total IPAQ score, MET-min/week

3577 [1105; 7482]

1099 [684; 2739]

6943 [3909; 9887]

<0.001

Resting values

    

FEV1,% predicted

111 [103; 119]

108 [99; 116]

113 [105; 122]

0.137

DLCO, mmol/min/kPa

10.84 [9.52; 11.68]

10.51 [8.55; 11.19]

11.29 [10.21; 12.08]

0.005

VC, mL

95 [82; 104]

89 [76; 99]

103 [89; 112]

0.002

DMCO, mmol/min/kPa

22.53 [21.51; 23.64]

21.31 [19.80; 22.81]

23.69 [21.18; 25.67]

0.019

At 50% peak work load

    

DLCO, mmol/min/kPa

13.42 [12.81; 14.05]

11.90 [10.67; 13.45]

14.23 [13.08; 16.08]

0.001

VC, mL

125 [117; 132]

108 [95; 126]

129 [110; 153]

0.025

DMCO, mmol/min/kPa

25.42 [24.31; 26.44]

23.41 [21.90; 24.92]

27.33 [25.81; 28.84]

< 0.001

At peak exercise

    

Exercise duration, min

640 [589; 721]

640 [592; 735]

632 [585; 688]

0.640

V ˙ O 2 , mL/kg/min

2932 [2370; 3600]

2385 [2068; 2671]

3468 [3181; 3900]

<0.001

V ˙ O 2 , % predicted

95 [80; 108]

80 [68; 93]

107 [97; 119]

< 0.001

  1. #using Mann and Whitney U test.
  2. VC denotes capillary blood volume and DMCO denotes the pulmonary membrane diffusing capacity for carbon monoxide calculated using single breath DLCO/DLNO measurement.