1. Volume 55, Issue 1, Pages 37-44 (January 1969)
Alterations in Lung Mechanics and Gas Exchange Following Training in Chronic Obstructive Lung Disease 
C.H. Woolf, M.D., F.C.C.P. 
Diseases of the Chest 
Volume 55, Issue 1, Pages (January 1969)
DOI: /chest
Copyright © 1969 The American College of Chest Physicians Terms and Conditions

2. Figure 1
Changes following training in individual patients. Patient identification on horizontal axis, change in test result on vertical axis. Horizontal line indicates no change at end of training period, increase is above line, decrease below line. Trend of increase in physiologic dead space, decrease in alveolar-arterial PO2 gradient, decrease in venous admixture and decrease in blood lactate and excess lactate.
Diseases of the Chest  , 37-44DOI: ( /chest )
Copyright © 1969 The American College of Chest Physicians Terms and Conditions

3. Figure 2
Changes following training in individual patients. Group 1 patients trained breathing air only (unshaded bars). Group 2 (shaded bars) patients requiring initia] training breathing 60 per cent oxygen. Respiratory rate, tidal volume and minute ventilation and fall of oxygen saturation at the fifth minute of exercise measured simultaneously with the mechanics of breathing. Trend of decrease in fall of arterial oxygen saturation and decrease in duration of 90 per cent desaturation time (see text). No trend in pattern of ventilation changes.
Diseases of the Chest  , 37-44DOI: ( /chest )
Copyright © 1969 The American College of Chest Physicians Terms and Conditions

4. Figure 3
Changes following training in individual patients. See legend of Figure 2. Trend of increased compliance, decreased respiratory work and decreased oxygen consumption measured at fifth minute of exercise. No trend in ventilatory equivalent for oxygen.
Diseases of the Chest  , 37-44DOI: ( /chest )
Copyright © 1969 The American College of Chest Physicians Terms and Conditions

5. Figure 4
Changes during training of respiratory rate (R), tidal volume (VT) and minute ventilation (V1) of Group 2 patients only. Meaning of letters A, B, C, D, and E as in Table 5.
Diseases of the Chest  , 37-44DOI: ( /chest )
Copyright © 1969 The American College of Chest Physicians Terms and Conditions