Can moderate-intensity aerobic exercise ameliorate atopic dermatitis?

It has been shown that aerobic exercise improves atopic dermatitis (AD), although the mechanism is not clear. Here, we propose a hypothesis that moderate-intensity aerobic exercise improves AD in a mouse model through modulating allergic inflammation. The DNCB-treated mouse model for eczema was divided into 3 groups: (a) not subjected to aerobic exercise, (b) subjected to continuous aerobic exercise and (c) subjected to accumulated aerobic exercise. After given exercise using a treadmill device either 30 min/d or 10 min x 3/day at a speed of 16 m/min, for 9 days, respectively, dermatitis symptom score, thickness of epidermis/dermis and eosinophil infiltration were decreased in the 2 exercise groups compared to the sedentary living group. The serum levels of IgE, MCP-1 and MDC showed a significant decrease both in the continuous or accumulated exercise groups. Moderate-intensity aerobic exercise ameliorates dermatitis symptoms through immune modulation in the DNCB-treated mouse model for eczema.