Table 2. Changes in pulmonary function and hematological variables over the course of the training period. Values represent mean (± standard deviation). Pre Post Change FVC (L) Mask Control 5.2 (1.19) 5.3 1.42 5.1 (1.20) 5.2 (1.36) -0.1 -0.1 FEV1(L) Mask Control 4.3 (1.03) 4.3 (1.07) 4.4 (1.03) 4.3 (1.04) +0.1 0.0 FEV1/FVC (%) Mask Control 82.1 (7.70) 81.1 (5.61) 83.5 (7.00) 82.2 (5.46) +1.4 +1.1 MIP (cmH2O) Mask Control 80.1 (27.50) 80.7 (29.20) 88.6 (28.19) 88.2 (34.81) +8.5 +7.5 Hb Mask Control 13.7 (1.09) 14.2 (.75) 13.0 (1.00) 13.5 (1.24) -0.7 -0.7 Hct (%) Mask Control 40.5 (4.00) 42.9 (2.84) 42.1 (1.88) 43.8 (3.55) +1.6 +0.9