1. Endurance training in patients with chronic obstructive pulmonary disease: A comparison of high versus moderate intensity 
Manuel Gimenez, MD, PhD, Emilio Servera, PhD, Pedro Vergara, BS, John R. Bach, MD, Jean-Marie Polu, MD 
Archives of Physical Medicine and Rehabilitation 
Volume 81, Issue 1, Pages (January 2000)
DOI: /S (00)
Copyright © 2000 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

2. Fig. 1
Comparison of maximal inspiratory flow (PIF) and expiratory flow (PEF), and maximal mouth inspiratory pressure (PImax) and expiratory pressure (PEmax), measured at rest before and after training in the SWEET user group (●) and the O2 cart pushing group (○) (**p < .01; ***p < .001).
Archives of Physical Medicine and Rehabilitation  , DOI: ( /S (00) )
Copyright © 2000 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

3. Fig. 2
Comparison of dyspnea, arterial lactate, and respiratory equivalent of oxygen (V̇E/V̇O2) before and after training in the SWEET user group (●) and the O2 cart pushing group (○) at 40 watts of exercise (*p < .05; ***p < .001).
Archives of Physical Medicine and Rehabilitation  , DOI: ( /S (00) )
Copyright © 2000 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

4. Fig. 3
Mean values of V̇O2max (or peak V̇O2), ventilatory anaerobic threshold (VAT), maximum tolerated power (TMW45), and 12-minute walk before and after training in the SWEET user group (●) and O2 cart pushing group (○) (*p < .05; **p < .01).
Archives of Physical Medicine and Rehabilitation  , DOI: ( /S (00) )
Copyright © 2000 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions