Respiratory Consequences of Mild-to-Moderate Obesity: Impact on Exercise Performance in Health and in Chronic Obstructive Pulmonary Disease

Figure 4

Operating lung volumes from rest-to-peak exercise are shown in normal weight (NW) and obese (OB) women. End-expiratory lung volume (EELV) increased by 0.38 L during exercise in OB but did not change in the NW subjects. Inspiratory reserve volume (IRV) was greater at rest and throughout exercise in OB women but was not statistically different at the peak of exercise. TLC: total lung capacity, IC: inspiratory capacity, 𝑉_𝑇: tidal volume (shaded area), from Ofir et al. [11].