After baseline assessments, the control group will receive a educational session, regarding important aspects of asthma (symptoms, treatment, exacerbations, triggers, etc) plus a unsupervised exercise prescription (walking, 5 times per week, for at least 30 minutes) and a pedometer-based physical activity prescription, consisting of targets to be achieved (in terms of steps per day).

After baseline assessments, the control group will receive a educational session, regarding important aspects of asthma (symptoms, treatment, exacerbations, triggers, etc) plus a unsupervised exercise prescription (walking, 5 times per week, for at least 30 minutes).

After baseline assessments, both groups will receive a educational session, regarding important aspects of asthma plus a unsupervised exercise prescription (walking, 5 times per week, for at least 30 minutes). Only the experimental group will receive a pedometer-based physical activity prescription, consisting of targets (steps per day) to be achieved. The initial target will be determined based on the average of steps per day assessed during the baseline assessments plus 1000 steps. The targets will be biweekly. Both groups will be contact once a week (by phone) and will be asked to return for asthma control assessments once a month.

The lifestyle physical activity will be estimated as the mean number of steps taken in six days using a pedometer (SW200, YAMAX,Tokyo, Japan)

Exercise capacity will be assessed through the six-minute walking teste.

Asthma Health related quality of life will be assessed through the Asthma Quality of Life Questionnaire.