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Heightened ventilatory response during stair climbing in individuals with dysfunctional breathing

Karina Siewers, Emil Walsted, Bishmann Manivannan, Christopher Warren, Colm McCabe, James H. Hull
ERJ Open Research 2022 8: 00285-2022; DOI: 10.1183/23120541.00285-2022
Karina Siewers
1Respiratory Research Unit, Department of Respiratory Medicine, Bispebjerg Hospital, Copenhagen, Denmark
2Department of Respiratory Medicine, Royal Brompton Hospital, London, UK
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  • ORCID record for Karina Siewers
Emil Walsted
1Respiratory Research Unit, Department of Respiratory Medicine, Bispebjerg Hospital, Copenhagen, Denmark
2Department of Respiratory Medicine, Royal Brompton Hospital, London, UK
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Bishmann Manivannan
2Department of Respiratory Medicine, Royal Brompton Hospital, London, UK
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Christopher Warren
2Department of Respiratory Medicine, Royal Brompton Hospital, London, UK
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Colm McCabe
2Department of Respiratory Medicine, Royal Brompton Hospital, London, UK
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James H. Hull
2Department of Respiratory Medicine, Royal Brompton Hospital, London, UK
3Institute of Sport, Exercise and Health, UCL, London, UK
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  • For correspondence: j.hull@rbht.nhs.uk
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Tables

  • TABLE 1

    Baseline data and cardiopulmonary response to stair climbing

    Controls#Patients¶p-value
    Males/females3/105/60.25
    Age, years49±8.054±9.90.19
    BMI, kg·m−226±5.229±3.00.047*
    Nijmegen questionnaire+3.5±4.723±9.8<0.01**
    Dyspnoea-12 questionnaire§0.0±015.7±8.6<0.01**
    FEV1, % predicted99.4±16109±100.23
    FVC, % predicted101±18115±120.04*
    Rest measurements
     VE, L·min−111±4.112±4.90.36
     BF, breaths per min17±3.322±5.00.01*
     VʹO2, mL·min−1·kg−14.5±1.23.8±0.70.91
     VT, L·min−10.69±0.20.59±0.10.09
     HR, beats per min78±1478±9.50.73
     PETCO2, kPa4.4±0.34.0±0.4<0.01**
     RER0.92±0.10.88±0.20.15
     Dyspnoeaƒ0.0 (0.0)0.5 (1.0)0.02*
     RPEƒ0.0 (0.0)1.0 (1.0)0.02*
    End-stair climb measurements
     VE, L·min−124±8.636±9.0<0.01**
     VE, % maximum22±5.931±9.70.02*
     BF, per min21±4.131±11<0.01**
      VʹO2, mL·min−1·kg−113±2.614±3.00.57
     BF change, breaths per min4±4.210±8.60.21
     VT, L·min−11.3±0.41.3±0.40.87
     HR, beats per min121±19116±170.65
     Dyspnoeaƒ0.5 (0.5)4.0 (2.0)0.00**
     RPEƒ1.0 (1.5)3.0 (4.0)0.00**
     Stair-climb time, s35.6±9.048.3±210.04*

    Data are presented as mean±sd or median (interquartile range), unless otherwise stated. BMI: body mass index; FEV1: forced expiratory volume in 1 s; FVC: forced vital capacity; VE: exhaled volume per breath; BF: breathing frequency; VʹO2: oxygen consumption; VT: tidal volume; HR: heart rate; PETCO2: end-tidal carbon dioxide tension; RER: respiratory exchange ratio; RPE: Rate of Perceived Exertion. #: N=13; ¶: N=11; +: out of 64; §: out of 24; ƒ: Borg Dyspnoea Scale. *: p<0.05; **: p<0.01.

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    Heightened ventilatory response during stair climbing in individuals with dysfunctional breathing
    Karina Siewers, Emil Walsted, Bishmann Manivannan, Christopher Warren, Colm McCabe, James H. Hull
    ERJ Open Research Oct 2022, 8 (4) 00285-2022; DOI: 10.1183/23120541.00285-2022

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    Heightened ventilatory response during stair climbing in individuals with dysfunctional breathing
    Karina Siewers, Emil Walsted, Bishmann Manivannan, Christopher Warren, Colm McCabe, James H. Hull
    ERJ Open Research Oct 2022, 8 (4) 00285-2022; DOI: 10.1183/23120541.00285-2022
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