Figure 4

Kinetics of SP-D levels in serum during constant load exercise. Kinetics of SP-D levels in serum during constant load exercise taken at 4 different time points: at rest (rest), after 5 min of steady state exercise (5 min), at the end of loaded exercise (end), and 20 min after exercise (recovery). Change in SP-D serum concentrations over time in elderly smokers (S2, open triangles, dashed line, n = 15) and smokers with COPD (C, black triangles, n = 15) are shown. Data are given on the vertical axis on a logarithmic scale as mean ± SEM, * p < 0.05 compared to time point "rest".