GOLDEN — For 12 years, Paul Stroud’s done everything he can to combat the effects of Parkinson’s disease. He had a pair of stimulators implanted deep in his brain. He takes the standard medications to treat symptoms. He even briefly tried out tai chi. Over the past couple of months, however, the 71-year-old’s discovered an effective form of therapy he may have never tried otherwise — one that takes him vertical. When Stroud sheds his walker to put on a harness and scale a climbing wall at Movement gym in Golden, his battle with Parkinson’s — and the issues with balance and tremors that accompany it — dissipates as he pulls himself up. “I don’t do real well with heights, so I’m not a big fanatic about going up the wall.