Earlier this month, there was “Unstoppable,” which told the story of Anthony Robles, a one-legged wrestler trying to make his way through the sport, dealing with all sorts of setbacks, including a violent home life. “The Fire Inside” is very similar, this time detailing the days of Claressa “T-Rex” Shields, a teenage boxer attempting to survive her environment and learn from a coach who cares about her future. There’s formula in both pictures, and while “Unstoppable” was indeed stopped by familiarity, “The Fire Inside” makes a noticeable effort to get past cliché. The screenplay, by Barry Jenkins, strives to merge the rush of underdog cinema with the reality of disillusionment, offering a more textured appreciation of struggle and sacrifice. And director Rachel Morrison (a longtime cinematographer making her helming debut) knows how to capture such tricky tonality, overseeing a challenging understanding of flickering spirit, and the production finds some fresh dramatic avenues to explore. Read the rest at Blu-ray.com