Seasonal changes influence the improvement in asthma symptoms by exercise training in subjects with asthma.

Mendes FAR; França-Pinto A; Martins MA; Cukier A; Stelmach R; Giavina-Bianchi P; Carvalho CRF;

The Journal Of Asthma: Official Journal Of The Association For The Care Of Asthma [J Asthma] 2018 Jul 04, pp. 1-19.

Objective: To investigate whether patients with moderate to severe asthma who commence an exercise training program in winter or summer show differences in exercise capacity, health-related quality of life (HRQoL) and asthma symptoms.
Methods: Forty-two consecutive subjects visiting the outpatient clinic were enrolled in the 17-week rehabilitation program. One group of patients received the intervention from summer to winter (SWG, n = 21), and the other group participated from winter to summer (WSG, n = 21). Before and after the exercise training program, all patients were evaluated by cardiopulmonary exercise test, pulmonary function test, quality of life questionnaire and a daily diary that evaluated clinical asthma symptoms.
Results: After the training period, both groups improved similarly in health-related quality of life (HRQoL) and aerobic capacity. The WSG patients had a greater increase that those in the SWG in asthma symptom-free days (p < 0.05, Table 2).
Conclusions: Our results indicate that seasonal variations affect the improvement in asthma symptoms after an exercise training program but have no effect on health-related quality of life, exercise capacity or pulmonary function.