This was a cross sectional, descriptive study analyzing written descriptions in 24-hour asthma diaries provided by adolescents with asthma (N=29). The asthma diaries were collected as part of a larger research study. The diary data reported in the current study capture one aspect of the self-regulation theory, perception of their experience (i.e., symptoms) to regulate their emotions (i.e., feelings) and subsequent behavior including activity and medication use.