If you’re going to star in a boxing movie, you really need to look like you belong in the ring. So, when Sydney Sweeney took on the role of Christy Martin – the pioneering female boxer, who also faced serious trials away from the ropes when her coach-turned-husband became abusive – she threw herself into training, donning those red gloves every day. And to help speed up the process, she brought the gym to her.

“I built my own version of a Rocky gym in my grandma’s garage,” Sweeney tells Empire of her training for Christy . “I had a floor ring, and bags hanging, and painted the walls with chalkboard paint. I felt like I was actually going for a real fight.” For a good chunk of a year, her days revolved around throwing down in the boxing ring. “I had three months of training and

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