1 Respiratory Rehabilitation of the Institute of Lumezzane, Istituti Clinici Scientifici Maugeri IRCCS, Lumezzane (Brescia), Italy. Electronic address: michele.vitacca@icsmaugeri.it.
2 Department of Sport, Exercise and Rehabilitation; Faculty of Health and Life Sciences. Northumbria University, Newcastle, UK.
3 Respiratory Rehabilitation of the Institute of Lumezzane, Istituti Clinici Scientifici Maugeri IRCCS, Lumezzane (Brescia), Italy.
4 Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Italy.