Skip to main content

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.