TABLE 1

Reference details, type of article and list of variables of nine studies reporting the dyspnoea–inactivity vicious circle in a diagram identified through the systematic literature search

ReferenceYearType of articleVariables involved in the dyspnoea–inactivity vicious circle
Cooper [5]2001ReviewDyspnoea, exercise capacity, muscle force, ventilatory requirements
Polkey and Moxhan [8]2006ReviewDyspnoea, muscle force, anaerobic metabolism, gas trapping, dyspnoea
Cooper [32]2006ReviewAirflow limitation, gas trapping, dyspnoea, physical activity, anxiety, tachypnoea, hypoxaemia, exercise capacity, ventilator requirements, health-related quality of life
Reardon et al. [7]2006ReviewDyspnoea, physical activity, exercise capacity
Decramer [33]2006ReviewAirflow limitation, gas trapping, dyspnoea, physical activity, exercise capacity, muscle force, chronic obstructive pulmonary disease exacerbation, health-related quality of life
Donaldson et al. [34]2012ReviewDyspnoea, physical activity, muscle force, anaerobic metabolism
Maltais [35]2013ReviewAirflow limitation, gas trapping, dyspnoea, physical activity, muscle force, comorbidities, exercise capacity, health-related quality of life
Garcia-Aymerich and Pitta [36]2014ReviewDyspnoea, physical activity, muscle force, exercise capacity
Corhay et al. [37]2014ReviewDyspnoea, physical activity, depression, anxiety