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Try running.  A Nurses Health Study with 116,000 patients showed that the most physically active patients decreased their risk significantly of getting psoriasis.  But, interestingly, other  forms of vigorous activities such as bicycling, swimming and playing tennis did not decrease psoriasis risk.

The mechanism that running as a vigorous exercise reduces psoriasis is not yet known. . . but it is thought that maybe exercise could “modulate a state of chronic inflammation and/or immune activation that predisposes women to develop psoriasis”—per the investigators.   I read that as. . . there are more benefits than just heart-health to keep running.

Consider running more than one hour per week or 4 hours per week or aerobics to help (with cardiac health, of course) and to decrease psoriasis.