Lorna Brunelle, owner of the Burt Wood School of Performing Arts in Middleborough, has taken her battle of the bulge nationally. Brunelle and three other women, including Farrah Lester, wife of Red Sox pitcher Jon Lester, are featured on “Wicked Fit,” a Boston-based series on The Style Network about how Katie Boyd, owner of the Miss Fit Club in Wellesley, whips women into shape. The show starts …