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. Author manuscript; available in PMC: 2016 Jun 15.
Published in final edited form as: J Breath Res. 2015 Mar 9;9(1):016009. doi: 10.1088/1752-7155/9/1/016009

Figure 2.

Figure 2

Relative changes of alveolar methane concentration during ergometer test: 5 min rest—15 min workload—5 min rest (recovery). Note that the average of the measurements of 5 subjects (normalized with the pre-exercise average per individual) is indicated. Error bars show standard deviation of data. The alveolar methane concentration was estimated from mixed expired concentration as given in section 2.4.