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Titolo:
Continuous measurement of breathlessness during exercise: validity, reliability, and responsiveness
Autore:
Mahler, DA; Mejia-Alfaro, R; Ward, J; Baird, JC;
Indirizzi:
Dartmouth Hitchcock Med Ctr, Pulm & Crit Care Med Sect, Lebanon, NH 03756 USA Dartmouth Hitchcock Med Ctr Lebanon NH USA 03756 t, Lebanon, NH 03756 USA Dartmouth Coll, Dept Psychol & Brain Sci, Hanover, NH 03755 USA Dartmouth Coll Hanover NH USA 03755 ol & Brain Sci, Hanover, NH 03755 USA
Titolo Testata:
JOURNAL OF APPLIED PHYSIOLOGY
fascicolo: 6, volume: 90, anno: 2001,
pagine: 2188 - 2196
SICI:
8750-7587(200106)90:6<2188:CMOBDE>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
VISUAL ANALOG SCALE; LUNG-DISEASE; DYSPNEA; SYMPTOM; REPRODUCIBILITY; ASTHMATICS; LIMITATION; SENSATION; INTENSITY; LOADS;
Keywords:
chronic obstructive pulmonary disease; breathlessness ratings; continuous measurement during exercise; category-ratio scale; inspiratory load;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Mahler, DA Dartmouth Hitchcock Med Ctr, Pulm & Crit Care Med Sect, 1 Med Ctr Dr, Lebanon, NH 03756 USA Dartmouth Hitchcock Med Ctr 1 Med Ctr Dr Lebanon NH USA 03756 A
Citazione:
D.A. Mahler et al., "Continuous measurement of breathlessness during exercise: validity, reliability, and responsiveness", J APP PHYSL, 90(6), 2001, pp. 2188-2196

Abstract

A continuous method for recording changes in breathlessness (dyspnea) during exercise is introduced and compared with the traditional discrete method. In study 1, a category-rating scale was presented on a computer screen, and 14 healthy, young female subjects exercised on a cycle ergometer until exhaustion. Two approaches were used to obtain ratings of breathlessness: a discrete method, in which subjects gave single judgments every minute, and a continuous method, in which subjects throughout exercise moved the mouse so that a bar on the screen extended to the desired location along the scale. Psychophysical results relating measures of breathlessness and the variables of work, oxygen consumption, and minute ventilation were statisticallyindistinguishable with the two methods, and both methods were highly reliable across test sessions. In study 2, both measurement methods were employed, and the subjects were 14 healthy, young males. In each of two sessions (discrete or continuous method), subjects first rated their breathlessness during an incremental test in which the workload was increased over time andlevels of work, and minute ventilation were recorded. Subjects then exercised for 10 min at 60% of the maximal oxygen consumption achieved during theincremental test. At two points during steady-state exercise, a respiratory load was introduced that lasted for 1 min. It was possible to determine the responsiveness of subjects to onset and offset of the respiratory load for the continuous method but not for the discrete method. In study 3, patients with chronic obstructive pulmonary disease employed both methods, and it was found that the continuous method was better at determining whether subjects showed a significant positive slope of the regression line between breathlessness ratings and physiological variables.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/05/20 alle ore 04:05:41