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Table 1 Subject characteristics

From: Endurance-training in healthy men is associated with lesser exertional breathlessness that correlates with circulatory-muscular conditioning markers in a cross-sectional design

Characteristic, median [25th– 75thpercentiles]

Inactive men N = 31

Endurance-trained men N = 31

P Value

Age, years

37 [29–48]

41 [26–47]

0.714

Height, cm

177 [171–183]

180 [177–185]

0.051

Weight, kg

73 [69–85]

75 [69–84]

0.961

BMI, kg. m2

24.2 [22.5-25.6]

23.1 [21.8-24.9]

0.215

Rowing/Triathlon

0 / 0

19 / 12

<0.001

Sport practice, hours/week

0.00 [0.00-0.00]

7.00 [5.00-10.00]

<0.001

FEV1,% predicted

108 [100–115]

114 [106–123]

0.082

Exercise test

   

Peak work rate, watts

201 [181–226]

318 [274–353]

<0.001

Peak work rate,% predicted

92 [80–97]

133 [120–144]

<0.001

Peak V O2, L.kg.min-1

31.4 [28.5-37.4]

46.3 [39.6-52.6]

<0.001

Peak V O2,% predicted

89 [75–101]

125 [114–136]

<0.001

Peak minute ventilation, L.min-1

86 [72–100]

127 [107–139]

<0.001

Peak minute ventilation, % predicted

88 [63–105]

110 [93–121]

0.001

Peak respiratory rate, cycles.min-1

34 [29–39]

44 [37–49]

0.001

Ventilatory capacity, %

61 [45–71]

77 [65–86]

<0.001

Peak heart rate, bpm.min-1

175 [162–183]

174 [168–183]

0.617

Δ V O2/Δwork slope

9.3 [8.8-9.8]

9.4 [8.8-10.0]

0.468

Peak breathlessness, Borg

5.0 [2.5-7.0]

7.0 [4.0-8.0]

0.570

Peak leg discomfort, Borg

7.0 [4.0-9.0]

5.0 [4.0-8.0]

0.233

Borg score at 30% V Emax predicted

2.0 [1.0-2.5]

1.0 [0.5-2.0]

0.020

Power Law of V O 2 -Breathlessness

   

   Constant a

0.087 [0.002-0.650]

0.001 [0.00001-0.202]

0.035

   Exponent b

2.69 [2.05-3.56]

2.84 [2.10-4.35]

0.548

  1. BMI denotes body mass index.