Fig. 5From: Effect of ramp bicycle exercise on exhaled carbon monoxide in humansThe effect of cessation time of smoking on \( \dot{V}_{\text{CO}} \) in two subjects. In the first measurement, the exercise testing started at least 2 h from the last smoking (S1-1 and S2-1). However, in the second measurement on different days, the exercise started immediately after smoking (S1-2 and S2-2), respectively. Note that \( \dot{V}_{\text{CO}} \) increased remarkably compared with the first measurementBack to article page